/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/array-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:38:03,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:38:03,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:38:03,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:38:03,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:38:03,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:38:03,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:38:03,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:38:03,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:38:03,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:38:03,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:38:03,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:38:03,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:38:03,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:38:03,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:38:03,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:38:03,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:38:03,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:38:03,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:38:03,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:38:03,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:38:03,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:38:03,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:38:03,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:38:03,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:38:03,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:38:03,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:38:03,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:38:03,799 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 18:38:03,821 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:38:03,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:38:03,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:38:03,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:38:03,828 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:38:03,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:38:03,828 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:38:03,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:38:03,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:38:03,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:38:03,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:38:03,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:38:03,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:38:03,830 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:38:03,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:38:03,830 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:38:03,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:38:03,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:38:03,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:38:03,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:38:03,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:38:03,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:38:03,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:38:03,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:38:03,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:38:03,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:38:03,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:38:03,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:38:03,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:38:04,099 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:38:04,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:38:04,115 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:38:04,117 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:38:04,117 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:38:04,118 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-11-06 18:38:04,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/937a4059d/1b36257baa8243c18b8a9829a259ca18/FLAG55c96f82a [2019-11-06 18:38:04,612 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:38:04,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-11-06 18:38:04,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/937a4059d/1b36257baa8243c18b8a9829a259ca18/FLAG55c96f82a [2019-11-06 18:38:05,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/937a4059d/1b36257baa8243c18b8a9829a259ca18 [2019-11-06 18:38:05,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:38:05,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:38:05,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:05,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:38:05,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:38:05,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d77e53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05, skipping insertion in model container [2019-11-06 18:38:05,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,049 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:38:05,073 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:38:05,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:05,315 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:38:05,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:05,450 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:38:05,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05 WrapperNode [2019-11-06 18:38:05,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:05,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:38:05,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:38:05,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:38:05,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (1/1) ... [2019-11-06 18:38:05,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:38:05,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:38:05,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:38:05,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:38:05,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (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 18:38:05,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:38:05,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:38:05,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:38:05,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:38:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:38:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:38:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:38:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-06 18:38:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:38:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:38:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:38:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:38:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:38:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:38:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:38:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:38:05,932 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:38:05,932 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-06 18:38:05,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:05 BoogieIcfgContainer [2019-11-06 18:38:05,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:38:05,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:38:05,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:38:05,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:38:05,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:38:05" (1/3) ... [2019-11-06 18:38:05,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f28846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:05, skipping insertion in model container [2019-11-06 18:38:05,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:05" (2/3) ... [2019-11-06 18:38:05,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f28846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:05, skipping insertion in model container [2019-11-06 18:38:05,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:05" (3/3) ... [2019-11-06 18:38:05,941 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2019-11-06 18:38:05,951 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:38:05,958 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:38:05,970 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:38:05,995 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:38:05,995 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:38:05,995 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:38:05,996 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:38:05,996 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:38:05,996 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:38:05,996 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:38:05,996 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:38:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-11-06 18:38:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:38:06,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:06,023 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] [2019-11-06 18:38:06,025 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1272746570, now seen corresponding path program 1 times [2019-11-06 18:38:06,039 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:06,039 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248081771] [2019-11-06 18:38:06,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:06,232 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 18:38:06,233 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248081771] [2019-11-06 18:38:06,234 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:06,234 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:38:06,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173564506] [2019-11-06 18:38:06,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:38:06,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:06,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:38:06,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:38:06,258 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-11-06 18:38:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:06,454 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-11-06 18:38:06,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:38:06,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:38:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:06,468 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:38:06,468 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:38:06,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:38:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:38:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 18:38:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:38:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-11-06 18:38:06,521 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-11-06 18:38:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:06,522 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-11-06 18:38:06,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:38:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-11-06 18:38:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:38:06,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:06,524 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] [2019-11-06 18:38:06,525 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:06,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1923539238, now seen corresponding path program 1 times [2019-11-06 18:38:06,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:06,526 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350031480] [2019-11-06 18:38:06,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:06,728 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 18:38:06,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350031480] [2019-11-06 18:38:06,729 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:06,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:38:06,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652238081] [2019-11-06 18:38:06,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:38:06,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:06,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:38:06,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:38:06,734 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 6 states. [2019-11-06 18:38:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:06,966 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-11-06 18:38:06,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:06,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-06 18:38:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:06,969 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:38:06,969 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:38:06,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:38:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-06 18:38:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 18:38:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-11-06 18:38:06,982 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-11-06 18:38:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:06,983 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-11-06 18:38:06,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:38:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-11-06 18:38:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:38:06,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:06,985 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] [2019-11-06 18:38:06,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash -772301532, now seen corresponding path program 1 times [2019-11-06 18:38:06,986 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:06,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658978991] [2019-11-06 18:38:06,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:38:07,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658978991] [2019-11-06 18:38:07,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:07,108 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:38:07,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985614228] [2019-11-06 18:38:07,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:38:07,110 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:38:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:38:07,111 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2019-11-06 18:38:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:07,261 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2019-11-06 18:38:07,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:38:07,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-11-06 18:38:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:07,263 INFO L225 Difference]: With dead ends: 119 [2019-11-06 18:38:07,263 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 18:38:07,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:38:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 18:38:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-06 18:38:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:38:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-11-06 18:38:07,275 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-11-06 18:38:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:07,275 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-11-06 18:38:07,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:38:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-11-06 18:38:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:38:07,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:07,277 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] [2019-11-06 18:38:07,277 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:07,278 INFO L82 PathProgramCache]: Analyzing trace with hash -213249118, now seen corresponding path program 1 times [2019-11-06 18:38:07,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:07,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055910324] [2019-11-06 18:38:07,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:38:07,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055910324] [2019-11-06 18:38:07,364 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:07,364 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:38:07,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544348847] [2019-11-06 18:38:07,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:38:07,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:38:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:38:07,366 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2019-11-06 18:38:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:07,572 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2019-11-06 18:38:07,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:07,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-06 18:38:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:07,574 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:38:07,574 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:38:07,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:38:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:38:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2019-11-06 18:38:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:38:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-11-06 18:38:07,582 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-11-06 18:38:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:07,583 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-11-06 18:38:07,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:38:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-11-06 18:38:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:38:07,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:07,585 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:07,585 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash 25817296, now seen corresponding path program 1 times [2019-11-06 18:38:07,586 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:07,586 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144937509] [2019-11-06 18:38:07,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:38:07,705 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144937509] [2019-11-06 18:38:07,705 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891777884] [2019-11-06 18:38:07,705 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 18:38:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:07,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:38:07,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:07,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:38:07,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526784752] [2019-11-06 18:38:07,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:38:07,864 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:38:07,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:07,865 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 7 states. [2019-11-06 18:38:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:08,059 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2019-11-06 18:38:08,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:08,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-11-06 18:38:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:08,061 INFO L225 Difference]: With dead ends: 103 [2019-11-06 18:38:08,061 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:38:08,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:38:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-06 18:38:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:38:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-11-06 18:38:08,085 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2019-11-06 18:38:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:08,086 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-11-06 18:38:08,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:38:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-11-06 18:38:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:38:08,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:08,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:08,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:08,300 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash -95536050, now seen corresponding path program 2 times [2019-11-06 18:38:08,300 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:08,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568207272] [2019-11-06 18:38:08,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:38:08,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568207272] [2019-11-06 18:38:08,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886644619] [2019-11-06 18:38:08,416 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 [2019-11-06 18:38:08,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:38:08,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:08,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:08,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:38:08,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:08,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 18:38:08,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645795422] [2019-11-06 18:38:08,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:38:08,524 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:38:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:08,528 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 8 states. [2019-11-06 18:38:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:08,774 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2019-11-06 18:38:08,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:38:08,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-11-06 18:38:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:08,776 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:38:08,776 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:38:08,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:38:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:38:08,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2019-11-06 18:38:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:38:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-06 18:38:08,789 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2019-11-06 18:38:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:08,789 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-06 18:38:08,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:38:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-06 18:38:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:38:08,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:08,791 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:08,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:08,995 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1296186118, now seen corresponding path program 3 times [2019-11-06 18:38:08,996 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:08,997 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347534382] [2019-11-06 18:38:08,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:10,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347534382] [2019-11-06 18:38:10,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266559002] [2019-11-06 18:38:10,833 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 [2019-11-06 18:38:10,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:38:10,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:10,904 WARN L254 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-06 18:38:10,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:11,004 INFO L375 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 15 treesize of output 11 [2019-11-06 18:38:11,005 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:11,015 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:11,016 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:11,016 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-06 18:38:12,676 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:12,686 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:12,687 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-11-06 18:38:12,689 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:12,723 INFO L567 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2019-11-06 18:38:12,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:12,728 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:12,729 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:36 [2019-11-06 18:38:12,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:12,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:12,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:13,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:13,016 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2019-11-06 18:38:13,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302972524] [2019-11-06 18:38:13,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-06 18:38:13,018 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-06 18:38:13,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:38:13,019 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 41 states. [2019-11-06 18:38:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:16,052 INFO L93 Difference]: Finished difference Result 212 states and 242 transitions. [2019-11-06 18:38:16,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:38:16,053 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2019-11-06 18:38:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:16,055 INFO L225 Difference]: With dead ends: 212 [2019-11-06 18:38:16,055 INFO L226 Difference]: Without dead ends: 206 [2019-11-06 18:38:16,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 50 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=255, Invalid=2607, Unknown=0, NotChecked=0, Total=2862 [2019-11-06 18:38:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-06 18:38:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 130. [2019-11-06 18:38:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-06 18:38:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2019-11-06 18:38:16,076 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2019-11-06 18:38:16,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:16,077 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2019-11-06 18:38:16,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-06 18:38:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2019-11-06 18:38:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:38:16,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:16,079 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:16,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:16,283 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:16,284 INFO L82 PathProgramCache]: Analyzing trace with hash -862553096, now seen corresponding path program 4 times [2019-11-06 18:38:16,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:16,285 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066018950] [2019-11-06 18:38:16,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:38:16,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066018950] [2019-11-06 18:38:16,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478725080] [2019-11-06 18:38:16,375 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 [2019-11-06 18:38:16,456 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:38:16,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:16,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:16,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:38:16,543 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:16,544 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:16,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546159233] [2019-11-06 18:38:16,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:16,547 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:16,548 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 14 states. [2019-11-06 18:38:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:17,162 INFO L93 Difference]: Finished difference Result 293 states and 339 transitions. [2019-11-06 18:38:17,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:38:17,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2019-11-06 18:38:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:17,167 INFO L225 Difference]: With dead ends: 293 [2019-11-06 18:38:17,167 INFO L226 Difference]: Without dead ends: 171 [2019-11-06 18:38:17,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:38:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-11-06 18:38:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 145. [2019-11-06 18:38:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-06 18:38:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2019-11-06 18:38:17,184 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2019-11-06 18:38:17,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:17,185 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2019-11-06 18:38:17,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2019-11-06 18:38:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 18:38:17,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:17,187 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:17,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:17,398 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash -320389322, now seen corresponding path program 5 times [2019-11-06 18:38:17,399 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:17,399 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497600773] [2019-11-06 18:38:17,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 18:38:17,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497600773] [2019-11-06 18:38:17,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679757623] [2019-11-06 18:38:17,484 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 [2019-11-06 18:38:17,638 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:38:17,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:17,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:17,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 18:38:17,708 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:17,708 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:17,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315113914] [2019-11-06 18:38:17,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:17,709 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:17,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:17,710 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand 14 states. [2019-11-06 18:38:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:18,327 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2019-11-06 18:38:18,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:38:18,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2019-11-06 18:38:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:18,330 INFO L225 Difference]: With dead ends: 162 [2019-11-06 18:38:18,330 INFO L226 Difference]: Without dead ends: 109 [2019-11-06 18:38:18,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:38:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-06 18:38:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2019-11-06 18:38:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-06 18:38:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-11-06 18:38:18,346 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2019-11-06 18:38:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:18,346 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-11-06 18:38:18,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-11-06 18:38:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:38:18,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:18,348 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:18,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:18,557 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash -850657884, now seen corresponding path program 6 times [2019-11-06 18:38:18,557 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:18,557 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129213534] [2019-11-06 18:38:18,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:19,985 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-11-06 18:38:20,155 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-11-06 18:38:20,728 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-11-06 18:38:20,891 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-11-06 18:38:21,047 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2019-11-06 18:38:21,211 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-11-06 18:38:21,934 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-11-06 18:38:22,117 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-06 18:38:22,289 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-11-06 18:38:22,469 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-11-06 18:38:22,628 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2019-11-06 18:38:23,017 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2019-11-06 18:38:23,214 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-11-06 18:38:23,396 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-11-06 18:38:23,970 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-11-06 18:38:24,173 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-06 18:38:24,357 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2019-11-06 18:38:24,811 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-11-06 18:38:25,007 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2019-11-06 18:38:26,072 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2019-11-06 18:38:26,279 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2019-11-06 18:38:26,513 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2019-11-06 18:38:26,738 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2019-11-06 18:38:26,927 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2019-11-06 18:38:27,644 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2019-11-06 18:38:27,838 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2019-11-06 18:38:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:28,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129213534] [2019-11-06 18:38:28,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244450670] [2019-11-06 18:38:28,971 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 [2019-11-06 18:38:29,055 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:38:29,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:29,060 WARN L254 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 142 conjunts are in the unsatisfiable core [2019-11-06 18:38:29,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:29,152 INFO L375 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 15 treesize of output 11 [2019-11-06 18:38:29,153 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:29,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:29,162 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:29,162 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-06 18:38:29,284 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:29,285 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-11-06 18:38:29,286 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:29,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:29,296 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:29,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2019-11-06 18:38:34,383 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:34,384 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:34,385 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:34,386 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:34,386 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:34,387 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:34,410 INFO L341 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2019-11-06 18:38:34,411 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 30 [2019-11-06 18:38:34,412 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:34,420 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:34,420 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:34,421 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:70, output treesize:3 [2019-11-06 18:38:34,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:34,746 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:34,746 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 43] total 102 [2019-11-06 18:38:34,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022365156] [2019-11-06 18:38:34,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-11-06 18:38:34,747 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-11-06 18:38:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=9544, Unknown=0, NotChecked=0, Total=10302 [2019-11-06 18:38:34,752 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 102 states. [2019-11-06 18:38:36,855 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 49 [2019-11-06 18:38:38,084 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2019-11-06 18:38:39,559 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2019-11-06 18:38:42,679 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 36