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_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:47,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:47,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:47,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:47,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:47,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:47,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:47,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:47,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:47,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:47,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:47,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:47,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:47,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:47,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:47,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:47,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:47,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:47,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:47,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:47,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:47,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:47,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:47,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:47,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:41:47,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:41:47,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:41:47,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:41:47,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:41:47,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:41:47,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:47,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:47,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:47,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:47,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:47,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:47,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:47,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:47,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:47,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:47,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:47,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:41:47,114 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:47,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:47,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:47,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:47,119 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:47,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:47,119 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:47,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:47,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:47,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:47,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:47,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:47,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:47,121 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:47,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:47,121 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:47,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:47,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:47,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:47,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:47,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:47,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:47,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:47,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:47,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:47,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:47,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:47,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:47,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:47,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:47,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:47,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:47,415 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:47,415 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:47,416 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-10-14 21:41:47,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8ee2038/0672cfdf38944464884b5c266b86c746/FLAG09581c045 [2019-10-14 21:41:47,937 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:47,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-10-14 21:41:47,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8ee2038/0672cfdf38944464884b5c266b86c746/FLAG09581c045 [2019-10-14 21:41:48,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8ee2038/0672cfdf38944464884b5c266b86c746 [2019-10-14 21:41:48,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:48,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:48,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:48,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:48,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:48,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397df160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48, skipping insertion in model container [2019-10-14 21:41:48,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,389 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:48,406 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:48,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:48,590 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:48,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:48,717 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:48,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48 WrapperNode [2019-10-14 21:41:48,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:48,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:48,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:48,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:48,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:48,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:48,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:48,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:48,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:48,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:48,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:48,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:48,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-14 21:41:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:41:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:49,114 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:49,114 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:41:49,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:49 BoogieIcfgContainer [2019-10-14 21:41:49,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:49,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:49,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:49,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:49,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:48" (1/3) ... [2019-10-14 21:41:49,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da5112f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:49, skipping insertion in model container [2019-10-14 21:41:49,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (2/3) ... [2019-10-14 21:41:49,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da5112f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:49, skipping insertion in model container [2019-10-14 21:41:49,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:49" (3/3) ... [2019-10-14 21:41:49,124 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2019-10-14 21:41:49,133 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:49,142 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:49,152 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:49,173 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:49,173 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:49,173 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:49,173 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:49,173 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:49,173 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:49,174 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:49,174 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-14 21:41:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:41:49,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:49,198 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:49,200 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash -286857817, now seen corresponding path program 1 times [2019-10-14 21:41:49,211 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:49,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673885877] [2019-10-14 21:41:49,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:49,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673885877] [2019-10-14 21:41:49,382 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:49,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:49,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646709303] [2019-10-14 21:41:49,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:49,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:49,400 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2019-10-14 21:41:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:49,527 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-10-14 21:41:49,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:49,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-14 21:41:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:49,537 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:41:49,537 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:41:49,541 INFO L600 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 [2019-10-14 21:41:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:41:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:41:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:41:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:41:49,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-10-14 21:41:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:49,576 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:41:49,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:41:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:41:49,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:49,578 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:49,579 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1625158677, now seen corresponding path program 1 times [2019-10-14 21:41:49,579 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:49,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256023428] [2019-10-14 21:41:49,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:49,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256023428] [2019-10-14 21:41:49,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:49,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:49,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751539650] [2019-10-14 21:41:49,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:49,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:49,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:49,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:49,721 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-10-14 21:41:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:49,869 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-10-14 21:41:49,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:49,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:41:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:49,871 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:41:49,871 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:41:49,872 INFO L600 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 [2019-10-14 21:41:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:41:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 21:41:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:41:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-14 21:41:49,886 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2019-10-14 21:41:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:49,887 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-14 21:41:49,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-14 21:41:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:41:49,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:49,890 INFO L380 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] [2019-10-14 21:41:49,891 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:49,892 INFO L82 PathProgramCache]: Analyzing trace with hash -573455021, now seen corresponding path program 1 times [2019-10-14 21:41:49,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:49,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180664402] [2019-10-14 21:41:49,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:49,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180664402] [2019-10-14 21:41:49,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:49,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:49,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524955912] [2019-10-14 21:41:49,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:49,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:49,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:49,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:49,971 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2019-10-14 21:41:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:50,062 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-14 21:41:50,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:50,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 21:41:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:50,065 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:41:50,066 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:41:50,067 INFO L600 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 [2019-10-14 21:41:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:41:50,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 21:41:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:41:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-14 21:41:50,078 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2019-10-14 21:41:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:50,079 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-14 21:41:50,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-14 21:41:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:41:50,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:50,082 INFO L380 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] [2019-10-14 21:41:50,082 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2038931473, now seen corresponding path program 1 times [2019-10-14 21:41:50,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:50,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271281931] [2019-10-14 21:41:50,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:50,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271281931] [2019-10-14 21:41:50,216 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:50,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:50,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460989746] [2019-10-14 21:41:50,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:50,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:50,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:50,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:50,218 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-10-14 21:41:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:50,331 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-10-14 21:41:50,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:50,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-14 21:41:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:50,333 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:41:50,333 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:41:50,333 INFO L600 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 [2019-10-14 21:41:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:41:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-10-14 21:41:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:41:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 21:41:50,340 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2019-10-14 21:41:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:50,340 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 21:41:50,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 21:41:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:41:50,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:50,342 INFO L380 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] [2019-10-14 21:41:50,342 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2121276981, now seen corresponding path program 1 times [2019-10-14 21:41:50,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:50,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382723864] [2019-10-14 21:41:50,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:41:50,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382723864] [2019-10-14 21:41:50,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24898883] [2019-10-14 21:41:50,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:50,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:41:50,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:50,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:50,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926073404] [2019-10-14 21:41:50,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:50,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:50,561 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-10-14 21:41:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:50,661 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-14 21:41:50,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:50,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-14 21:41:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:50,662 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:41:50,662 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:41:50,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:41:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 21:41:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:41:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 21:41:50,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2019-10-14 21:41:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:50,676 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 21:41:50,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 21:41:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:50,677 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:50,678 INFO L380 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] [2019-10-14 21:41:50,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:50,885 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash -376037751, now seen corresponding path program 2 times [2019-10-14 21:41:50,885 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:50,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6954785] [2019-10-14 21:41:50,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:41:50,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6954785] [2019-10-14 21:41:50,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754731047] [2019-10-14 21:41:50,964 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 [2019-10-14 21:41:51,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:51,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:51,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:51,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:41:51,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:51,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:51,055 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503535964] [2019-10-14 21:41:51,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:51,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:51,056 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2019-10-14 21:41:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:51,209 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-10-14 21:41:51,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:51,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-14 21:41:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:51,210 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:41:51,210 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:41:51,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:41:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-10-14 21:41:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:41:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 21:41:51,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2019-10-14 21:41:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:51,218 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 21:41:51,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 21:41:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:41:51,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:51,220 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:51,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:51,425 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:51,426 INFO L82 PathProgramCache]: Analyzing trace with hash -740334591, now seen corresponding path program 3 times [2019-10-14 21:41:51,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:51,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935720519] [2019-10-14 21:41:51,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:51,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:51,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:52,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935720519] [2019-10-14 21:41:52,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321624087] [2019-10-14 21:41:52,472 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 [2019-10-14 21:41:52,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:52,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:52,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-14 21:41:52,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:52,641 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 [2019-10-14 21:41:52,642 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:52,652 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:52,653 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:52,653 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2019-10-14 21:41:54,092 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:54,093 INFO L375 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 [2019-10-14 21:41:54,095 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-14 21:41:54,110 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:54,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:54,116 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. [2019-10-14 21:41:54,116 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-10-14 21:41:54,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:54,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:54,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:54,395 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:54,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 49 [2019-10-14 21:41:54,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741568416] [2019-10-14 21:41:54,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-14 21:41:54,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:54,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-14 21:41:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2179, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 21:41:54,398 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 49 states. [2019-10-14 21:41:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:56,923 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2019-10-14 21:41:56,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 21:41:56,924 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 40 [2019-10-14 21:41:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:56,926 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:41:56,926 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:41:56,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2019-10-14 21:41:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:41:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2019-10-14 21:41:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:41:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-10-14 21:41:56,939 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2019-10-14 21:41:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:56,939 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-10-14 21:41:56,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-14 21:41:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-10-14 21:41:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:41:56,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:56,941 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-14 21:41:57,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:57,148 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1774785985, now seen corresponding path program 4 times [2019-10-14 21:41:57,150 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:57,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997409527] [2019-10-14 21:41:57,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:57,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:57,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:41:57,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997409527] [2019-10-14 21:41:57,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621811721] [2019-10-14 21:41:57,241 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 [2019-10-14 21:41:57,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:57,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:57,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:57,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:41:57,341 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:57,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:57,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108386073] [2019-10-14 21:41:57,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:57,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:57,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:57,343 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 14 states. [2019-10-14 21:41:57,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:57,594 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2019-10-14 21:41:57,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:41:57,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-10-14 21:41:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:57,596 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:41:57,597 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:41:57,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:41:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:41:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-10-14 21:41:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:41:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2019-10-14 21:41:57,607 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 42 [2019-10-14 21:41:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:57,607 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2019-10-14 21:41:57,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2019-10-14 21:41:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:41:57,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:57,609 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 21:41:57,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:57,813 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash -536741379, now seen corresponding path program 5 times [2019-10-14 21:41:57,814 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:57,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525922486] [2019-10-14 21:41:57,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:57,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:57,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:41:57,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525922486] [2019-10-14 21:41:57,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908017209] [2019-10-14 21:41:57,907 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 [2019-10-14 21:41:57,964 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:41:57,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:57,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:57,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:41:58,076 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:58,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-14 21:41:58,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072310063] [2019-10-14 21:41:58,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:41:58,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:58,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:41:58,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:41:58,078 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 17 states. [2019-10-14 21:41:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:58,410 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2019-10-14 21:41:58,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:41:58,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-10-14 21:41:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:58,412 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:41:58,412 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:41:58,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:41:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-10-14 21:41:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:41:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 21:41:58,421 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2019-10-14 21:41:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:58,422 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 21:41:58,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:41:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 21:41:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:41:58,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:58,423 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:58,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:58,627 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1811621193, now seen corresponding path program 6 times [2019-10-14 21:41:58,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:58,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985794190] [2019-10-14 21:41:58,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:02,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985794190] [2019-10-14 21:42:02,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62372701] [2019-10-14 21:42:02,075 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 [2019-10-14 21:42:02,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:42:02,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:02,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-14 21:42:02,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:02,257 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 [2019-10-14 21:42:02,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:02,264 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:02,265 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:02,265 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-10-14 21:42:04,054 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:04,055 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:04,056 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:04,057 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:04,060 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:04,061 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 15 [2019-10-14 21:42:04,062 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:04,067 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:04,068 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:04,068 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2019-10-14 21:42:04,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:04,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:04,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 35] total 73 [2019-10-14 21:42:04,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443457251] [2019-10-14 21:42:04,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-10-14 21:42:04,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:04,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-10-14 21:42:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=4753, Unknown=0, NotChecked=0, Total=5256 [2019-10-14 21:42:04,208 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 73 states. [2019-10-14 21:42:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:11,530 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2019-10-14 21:42:11,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-10-14 21:42:11,531 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 50 [2019-10-14 21:42:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:11,532 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:42:11,533 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 21:42:11,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4720 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1597, Invalid=13165, Unknown=0, NotChecked=0, Total=14762 [2019-10-14 21:42:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 21:42:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2019-10-14 21:42:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:42:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-10-14 21:42:11,547 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2019-10-14 21:42:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:11,548 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-10-14 21:42:11,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-10-14 21:42:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-10-14 21:42:11,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:42:11,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:11,549 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-10-14 21:42:11,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:11,752 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:11,753 INFO L82 PathProgramCache]: Analyzing trace with hash -489059467, now seen corresponding path program 7 times [2019-10-14 21:42:11,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:11,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661561067] [2019-10-14 21:42:11,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:11,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:11,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:42:11,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661561067] [2019-10-14 21:42:11,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250892989] [2019-10-14 21:42:11,845 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:11,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:11,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:42:11,978 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:11,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:42:11,978 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725744384] [2019-10-14 21:42:11,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:11,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:11,979 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 17 states. [2019-10-14 21:42:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:12,312 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2019-10-14 21:42:12,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:42:12,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2019-10-14 21:42:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:12,313 INFO L225 Difference]: With dead ends: 138 [2019-10-14 21:42:12,314 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:42:12,315 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:42:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 21:42:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:42:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2019-10-14 21:42:12,325 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 52 [2019-10-14 21:42:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:12,325 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2019-10-14 21:42:12,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2019-10-14 21:42:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:42:12,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:12,327 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2019-10-14 21:42:12,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:12,531 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:12,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1826978381, now seen corresponding path program 8 times [2019-10-14 21:42:12,532 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:12,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859922156] [2019-10-14 21:42:12,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:12,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:12,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:42:12,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859922156] [2019-10-14 21:42:12,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784957313] [2019-10-14 21:42:12,630 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:12,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:12,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:12,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:12,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:42:12,833 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:12,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:42:12,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513028740] [2019-10-14 21:42:12,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:12,836 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:12,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:12,837 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 17 states. [2019-10-14 21:42:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:13,144 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2019-10-14 21:42:13,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:42:13,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2019-10-14 21:42:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:13,145 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:42:13,145 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:42:13,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:42:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-10-14 21:42:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:42:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 21:42:13,155 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2019-10-14 21:42:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:13,156 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 21:42:13,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 21:42:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:42:13,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:13,157 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:13,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:13,360 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:13,361 INFO L82 PathProgramCache]: Analyzing trace with hash -381639187, now seen corresponding path program 9 times [2019-10-14 21:42:13,361 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:13,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457918637] [2019-10-14 21:42:13,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:13,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:13,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:14,242 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2019-10-14 21:42:14,388 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2019-10-14 21:42:14,548 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2019-10-14 21:42:14,694 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2019-10-14 21:42:14,831 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2019-10-14 21:42:15,577 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2019-10-14 21:42:15,719 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-10-14 21:42:15,871 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2019-10-14 21:42:16,026 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2019-10-14 21:42:16,187 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2019-10-14 21:42:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:18,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457918637] [2019-10-14 21:42:18,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416219416] [2019-10-14 21:42:18,843 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:18,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:42:18,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:18,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 84 conjunts are in the unsatisfiable core [2019-10-14 21:42:18,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:18,965 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 [2019-10-14 21:42:18,965 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:18,974 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:18,974 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:18,974 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-10-14 21:42:22,373 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:22,374 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:22,375 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:22,391 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:22,392 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2019-10-14 21:42:22,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:22,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:22,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:22,396 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2019-10-14 21:42:22,425 INFO L567 ElimStorePlain]: treesize reduction 47, result has 39.7 percent of original size [2019-10-14 21:42:22,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:22,427 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. [2019-10-14 21:42:22,427 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:19 [2019-10-14 21:42:22,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:22,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:22,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:22,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:22,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 41] total 89 [2019-10-14 21:42:22,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054601135] [2019-10-14 21:42:22,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-10-14 21:42:22,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-10-14 21:42:22,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=7241, Unknown=0, NotChecked=0, Total=7832 [2019-10-14 21:42:22,851 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 89 states. [2019-10-14 21:42:25,615 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2019-10-14 21:42:27,795 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2019-10-14 21:42:28,117 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2019-10-14 21:42:28,440 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2019-10-14 21:42:31,074 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81