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_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:50,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:50,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:50,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:50,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:50,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:50,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:50,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:50,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:50,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:50,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:50,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:50,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:50,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:50,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:50,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:50,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:50,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:50,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:50,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:50,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:50,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:50,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:50,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:50,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:41:50,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:41:50,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:41:50,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:41:50,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:41:50,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:41:50,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:50,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:50,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:50,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:50,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:50,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:50,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:50,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:50,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:50,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:50,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:50,417 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 21:41:50,431 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:50,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:50,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:50,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:50,434 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:50,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:50,435 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:50,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:50,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:50,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:50,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:50,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:50,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:50,436 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:50,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:50,436 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:50,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:50,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:50,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:50,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:50,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:50,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:50,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:50,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:50,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:50,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:50,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:50,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:50,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:50,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:50,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:50,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:50,732 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:50,732 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:50,733 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-10-14 21:41:50,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9965e12/da6bd967e13643018000e975a69f6c7a/FLAG9583ba226 [2019-10-14 21:41:51,287 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:51,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-10-14 21:41:51,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9965e12/da6bd967e13643018000e975a69f6c7a/FLAG9583ba226 [2019-10-14 21:41:51,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9965e12/da6bd967e13643018000e975a69f6c7a [2019-10-14 21:41:51,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:51,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:51,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:51,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:51,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:51,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a425a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51, skipping insertion in model container [2019-10-14 21:41:51,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,690 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:51,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:51,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:51,923 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:51,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:52,060 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:52,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52 WrapperNode [2019-10-14 21:41:52,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:52,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:52,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:52,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:52,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (1/1) ... [2019-10-14 21:41:52,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (1/1) ... [2019-10-14 21:41:52,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (1/1) ... [2019-10-14 21:41:52,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (1/1) ... [2019-10-14 21:41:52,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (1/1) ... [2019-10-14 21:41:52,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (1/1) ... [2019-10-14 21:41:52,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (1/1) ... [2019-10-14 21:41:52,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:52,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:52,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:52,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:52,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (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 21:41:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-14 21:41:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:41:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:52,565 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:52,566 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-14 21:41:52,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:52 BoogieIcfgContainer [2019-10-14 21:41:52,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:52,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:52,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:52,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:52,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:51" (1/3) ... [2019-10-14 21:41:52,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4229b958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:52, skipping insertion in model container [2019-10-14 21:41:52,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:52" (2/3) ... [2019-10-14 21:41:52,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4229b958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:52, skipping insertion in model container [2019-10-14 21:41:52,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:52" (3/3) ... [2019-10-14 21:41:52,576 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-10-14 21:41:52,587 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:52,595 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:52,607 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:52,634 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:52,634 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:52,634 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:52,634 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:52,634 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:52,635 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:52,635 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:52,635 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2019-10-14 21:41:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:52,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:52,665 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, 1, 1] [2019-10-14 21:41:52,667 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash -298961335, now seen corresponding path program 1 times [2019-10-14 21:41:52,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:52,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299122131] [2019-10-14 21:41:52,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,889 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 21:41:52,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299122131] [2019-10-14 21:41:52,891 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:52,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:52,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052755176] [2019-10-14 21:41:52,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:52,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:52,917 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2019-10-14 21:41:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:53,105 INFO L93 Difference]: Finished difference Result 95 states and 139 transitions. [2019-10-14 21:41:53,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:53,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:41:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:53,118 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:41:53,118 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:41:53,122 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 21:41:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:41:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:41:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:41:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-14 21:41:53,171 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-10-14 21:41:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:53,172 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-14 21:41:53,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-14 21:41:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:53,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:53,174 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, 1, 1] [2019-10-14 21:41:53,175 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash 351831333, now seen corresponding path program 1 times [2019-10-14 21:41:53,176 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:53,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108477588] [2019-10-14 21:41:53,176 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,383 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 21:41:53,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108477588] [2019-10-14 21:41:53,385 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:53,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:53,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820937812] [2019-10-14 21:41:53,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:53,389 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:53,391 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 6 states. [2019-10-14 21:41:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:53,664 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-10-14 21:41:53,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:53,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-14 21:41:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:53,667 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:41:53,667 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:41:53,669 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 21:41:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:41:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-14 21:41:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:41:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-10-14 21:41:53,700 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-10-14 21:41:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:53,701 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-10-14 21:41:53,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-10-14 21:41:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:41:53,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:53,704 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, 1, 1, 1, 1] [2019-10-14 21:41:53,704 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:53,706 INFO L82 PathProgramCache]: Analyzing trace with hash 615337315, now seen corresponding path program 1 times [2019-10-14 21:41:53,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:53,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100172401] [2019-10-14 21:41:53,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,842 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 21:41:53,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100172401] [2019-10-14 21:41:53,843 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:53,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:53,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621602808] [2019-10-14 21:41:53,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:53,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:53,849 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2019-10-14 21:41:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:53,973 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2019-10-14 21:41:53,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:53,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-10-14 21:41:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:53,975 INFO L225 Difference]: With dead ends: 119 [2019-10-14 21:41:53,976 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:41:53,977 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 21:41:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:41:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 21:41:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:41:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-14 21:41:53,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-10-14 21:41:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:53,986 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-14 21:41:53,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-14 21:41:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:41:53,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:53,988 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, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:53,988 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1838268449, now seen corresponding path program 1 times [2019-10-14 21:41:53,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:53,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710287932] [2019-10-14 21:41:53,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:54,075 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 21:41:54,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710287932] [2019-10-14 21:41:54,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:54,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:54,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91529520] [2019-10-14 21:41:54,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:54,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:54,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:54,078 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2019-10-14 21:41:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:54,268 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2019-10-14 21:41:54,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:54,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-14 21:41:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:54,270 INFO L225 Difference]: With dead ends: 114 [2019-10-14 21:41:54,270 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:41:54,271 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 21:41:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:41:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2019-10-14 21:41:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:41:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-14 21:41:54,279 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-10-14 21:41:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:54,279 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-14 21:41:54,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-14 21:41:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:41:54,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:54,283 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, 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 21:41:54,283 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1356508047, now seen corresponding path program 1 times [2019-10-14 21:41:54,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:54,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277901580] [2019-10-14 21:41:54,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:54,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277901580] [2019-10-14 21:41:54,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336297413] [2019-10-14 21:41:54,432 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 21:41:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:54,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:54,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:54,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:54,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:41:54,561 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522068883] [2019-10-14 21:41:54,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:54,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:54,563 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 8 states. [2019-10-14 21:41:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:54,877 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2019-10-14 21:41:54,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:41:54,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2019-10-14 21:41:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:54,879 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:41:54,879 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:41:54,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:41:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 21:41:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:41:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-10-14 21:41:54,893 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 54 [2019-10-14 21:41:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:54,894 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-10-14 21:41:54,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-10-14 21:41:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:41:54,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:54,898 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:55,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:55,103 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1043072633, now seen corresponding path program 2 times [2019-10-14 21:41:55,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:55,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710556927] [2019-10-14 21:41:55,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:55,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:55,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:58,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710556927] [2019-10-14 21:41:58,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385067024] [2019-10-14 21:41:58,033 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 21:41:58,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:58,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:58,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 96 conjunts are in the unsatisfiable core [2019-10-14 21:41:58,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:00,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:00,902 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:00,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42] total 76 [2019-10-14 21:42:00,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198686632] [2019-10-14 21:42:00,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-10-14 21:42:00,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-10-14 21:42:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=5467, Unknown=0, NotChecked=0, Total=5700 [2019-10-14 21:42:00,906 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 76 states. [2019-10-14 21:42:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:04,430 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2019-10-14 21:42:04,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-14 21:42:04,431 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2019-10-14 21:42:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:04,433 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:42:04,433 INFO L226 Difference]: Without dead ends: 142 [2019-10-14 21:42:04,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=269, Invalid=6373, Unknown=0, NotChecked=0, Total=6642 [2019-10-14 21:42:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-10-14 21:42:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2019-10-14 21:42:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 21:42:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2019-10-14 21:42:04,451 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2019-10-14 21:42:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:04,452 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2019-10-14 21:42:04,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-10-14 21:42:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2019-10-14 21:42:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:42:04,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:04,456 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:04,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:04,670 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash 867658167, now seen corresponding path program 3 times [2019-10-14 21:42:04,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:04,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184897539] [2019-10-14 21:42:04,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:04,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:04,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:42:04,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184897539] [2019-10-14 21:42:04,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776260720] [2019-10-14 21:42:04,785 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 21:42:04,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:42:04,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:04,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:04,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:42:04,976 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:04,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-10-14 21:42:04,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883294051] [2019-10-14 21:42:04,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:42:04,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:42:04,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:04,982 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 16 states. [2019-10-14 21:42:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:05,750 INFO L93 Difference]: Finished difference Result 346 states and 400 transitions. [2019-10-14 21:42:05,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:05,751 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:42:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:05,754 INFO L225 Difference]: With dead ends: 346 [2019-10-14 21:42:05,755 INFO L226 Difference]: Without dead ends: 171 [2019-10-14 21:42:05,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-14 21:42:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 145. [2019-10-14 21:42:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 21:42:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2019-10-14 21:42:05,772 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2019-10-14 21:42:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:05,773 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2019-10-14 21:42:05,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:42:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2019-10-14 21:42:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 21:42:05,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:05,775 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:05,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:05,979 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash 230738229, now seen corresponding path program 4 times [2019-10-14 21:42:05,980 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:05,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805718874] [2019-10-14 21:42:05,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:05,981 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:05,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:42:06,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805718874] [2019-10-14 21:42:06,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17706531] [2019-10-14 21:42:06,081 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 21:42:06,142 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:06,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:06,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:06,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:42:06,270 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:06,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-10-14 21:42:06,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512811278] [2019-10-14 21:42:06,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:42:06,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:42:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:06,272 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand 16 states. [2019-10-14 21:42:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:06,844 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2019-10-14 21:42:06,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:06,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2019-10-14 21:42:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:06,845 INFO L225 Difference]: With dead ends: 162 [2019-10-14 21:42:06,846 INFO L226 Difference]: Without dead ends: 109 [2019-10-14 21:42:06,848 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-14 21:42:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2019-10-14 21:42:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 21:42:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-10-14 21:42:06,868 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2019-10-14 21:42:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:06,869 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-10-14 21:42:06,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:42:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-10-14 21:42:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:42:06,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:06,873 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:07,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:07,075 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1937623581, now seen corresponding path program 5 times [2019-10-14 21:42:07,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:07,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245048421] [2019-10-14 21:42:07,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:07,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:07,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,062 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 14 [2019-10-14 21:42:08,248 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2019-10-14 21:42:08,466 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2019-10-14 21:42:08,663 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2019-10-14 21:42:08,885 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2019-10-14 21:42:09,078 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 32 [2019-10-14 21:42:09,278 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2019-10-14 21:42:09,466 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2019-10-14 21:42:09,666 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2019-10-14 21:42:09,859 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2019-10-14 21:42:10,078 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 43 [2019-10-14 21:42:10,304 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2019-10-14 21:42:10,494 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2019-10-14 21:42:10,682 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 33 [2019-10-14 21:42:10,895 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2019-10-14 21:42:11,065 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2019-10-14 21:42:11,260 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2019-10-14 21:42:11,497 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2019-10-14 21:42:11,769 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2019-10-14 21:42:11,998 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2019-10-14 21:42:12,212 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2019-10-14 21:42:12,419 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-10-14 21:42:12,620 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-10-14 21:42:12,815 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2019-10-14 21:42:13,009 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2019-10-14 21:42:13,213 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2019-10-14 21:42:13,442 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2019-10-14 21:42:13,679 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2019-10-14 21:42:13,912 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2019-10-14 21:42:14,122 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2019-10-14 21:42:14,332 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2019-10-14 21:42:14,489 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2019-10-14 21:42:14,675 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2019-10-14 21:42:14,888 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-10-14 21:42:15,155 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2019-10-14 21:42:15,388 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2019-10-14 21:42:15,594 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2019-10-14 21:42:15,831 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2019-10-14 21:42:16,040 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2019-10-14 21:42:16,198 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2019-10-14 21:42:16,396 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2019-10-14 21:42:16,599 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-10-14 21:42:16,836 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2019-10-14 21:42:17,069 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2019-10-14 21:42:17,264 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2019-10-14 21:42:17,702 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2019-10-14 21:42:17,929 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2019-10-14 21:42:18,164 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2019-10-14 21:42:18,718 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2019-10-14 21:42:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:21,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245048421] [2019-10-14 21:42:21,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466306745] [2019-10-14 21:42:21,543 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 21:42:22,346 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:42:22,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:22,354 WARN L254 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 138 conjunts are in the unsatisfiable core [2019-10-14 21:42:22,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:22,467 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 21:42:22,467 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:22,478 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:22,479 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 21:42:22,479 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-10-14 21:42:22,556 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 13 treesize of output 9 [2019-10-14 21:42:22,557 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:22,562 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:22,563 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 21:42:22,563 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:42:27,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:28,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:28,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 60] total 133 [2019-10-14 21:42:28,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240008915] [2019-10-14 21:42:28,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 133 states [2019-10-14 21:42:28,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:28,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2019-10-14 21:42:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=16173, Unknown=0, NotChecked=0, Total=17556 [2019-10-14 21:42:28,159 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 133 states. [2019-10-14 21:42:31,147 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2019-10-14 21:42:33,097 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48