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_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:40:59,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:40:59,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:40:59,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:40:59,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:40:59,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:40:59,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:40:59,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:40:59,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:40:59,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:40:59,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:40:59,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:40:59,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:40:59,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:40:59,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:40:59,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:40:59,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:40:59,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:40:59,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:40:59,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:40:59,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:40:59,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:40:59,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:40:59,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:40:59,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:40:59,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:40:59,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:40:59,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:40:59,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:40:59,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:40:59,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:40:59,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:40:59,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:40:59,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:40:59,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:40:59,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:40:59,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:40:59,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:40:59,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:40:59,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:40:59,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:40:59,242 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 21:40:59,264 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:40:59,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:40:59,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:40:59,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:40:59,267 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:40:59,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:40:59,267 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:40:59,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:40:59,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:40:59,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:40:59,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:40:59,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:40:59,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:40:59,268 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:40:59,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:40:59,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:40:59,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:40:59,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:40:59,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:40:59,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:40:59,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:40:59,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:59,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:40:59,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:40:59,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:40:59,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:40:59,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:40:59,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:40:59,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:40:59,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:40:59,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:40:59,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:40:59,599 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:40:59,599 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:40:59,600 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2019-10-14 21:40:59,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d55cd70d1/8479a7911cb64f4eaba857e99d7fda7c/FLAG2402b9739 [2019-10-14 21:41:00,138 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:00,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum3.c [2019-10-14 21:41:00,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d55cd70d1/8479a7911cb64f4eaba857e99d7fda7c/FLAG2402b9739 [2019-10-14 21:41:00,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d55cd70d1/8479a7911cb64f4eaba857e99d7fda7c [2019-10-14 21:41:00,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:00,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:00,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:00,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:00,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:00,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:00,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16920bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00, skipping insertion in model container [2019-10-14 21:41:00,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:00,510 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:00,533 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:00,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:00,828 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:00,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:00,893 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:00,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00 WrapperNode [2019-10-14 21:41:00,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:00,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:00,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:00,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:00,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:00,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:00,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:00,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:00,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:01,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:01,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (1/1) ... [2019-10-14 21:41:01,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:01,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:01,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:01,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:01,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (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 21:41:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-14 21:41:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:41:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:01,484 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:01,485 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-14 21:41:01,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:01 BoogieIcfgContainer [2019-10-14 21:41:01,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:01,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:01,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:01,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:01,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:00" (1/3) ... [2019-10-14 21:41:01,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453e51ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:01, skipping insertion in model container [2019-10-14 21:41:01,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:00" (2/3) ... [2019-10-14 21:41:01,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453e51ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:01, skipping insertion in model container [2019-10-14 21:41:01,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:01" (3/3) ... [2019-10-14 21:41:01,496 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2019-10-14 21:41:01,507 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:01,515 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:01,526 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:01,552 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:01,552 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:01,552 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:01,553 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:01,553 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:01,553 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:01,553 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:01,553 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-10-14 21:41:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:41:01,580 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,581 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 21:41:01,583 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash -604531369, now seen corresponding path program 1 times [2019-10-14 21:41:01,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:01,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771691907] [2019-10-14 21:41:01,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,764 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 21:41:01,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771691907] [2019-10-14 21:41:01,766 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:01,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:01,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476673688] [2019-10-14 21:41:01,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:01,772 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:01,791 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2019-10-14 21:41:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:01,937 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2019-10-14 21:41:01,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:01,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-14 21:41:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:01,949 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:41:01,949 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:41:01,953 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 21:41:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:41:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:41:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:41:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-14 21:41:01,994 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2019-10-14 21:41:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:01,995 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-14 21:41:01,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-14 21:41:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:41:01,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,997 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 21:41:01,997 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:01,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1170586821, now seen corresponding path program 1 times [2019-10-14 21:41:01,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:01,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706773019] [2019-10-14 21:41:01,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,140 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 21:41:02,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706773019] [2019-10-14 21:41:02,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:02,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:02,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003506433] [2019-10-14 21:41:02,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:02,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:02,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:02,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:02,145 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2019-10-14 21:41:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:02,349 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-10-14 21:41:02,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:02,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-14 21:41:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:02,352 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:41:02,353 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:41:02,355 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 21:41:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:41:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:41:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:41:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-10-14 21:41:02,377 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2019-10-14 21:41:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:02,378 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-10-14 21:41:02,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-10-14 21:41:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:41:02,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:02,384 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] [2019-10-14 21:41:02,384 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash 669656451, now seen corresponding path program 1 times [2019-10-14 21:41:02,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598514244] [2019-10-14 21:41:02,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,519 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 21:41:02,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598514244] [2019-10-14 21:41:02,520 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:02,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:02,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363113067] [2019-10-14 21:41:02,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:02,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:02,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:02,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:02,525 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2019-10-14 21:41:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:02,627 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-14 21:41:02,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:02,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-10-14 21:41:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:02,630 INFO L225 Difference]: With dead ends: 79 [2019-10-14 21:41:02,630 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:41:02,631 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 21:41:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:41:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:41:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:41:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-10-14 21:41:02,640 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 26 [2019-10-14 21:41:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:02,640 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-10-14 21:41:02,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2019-10-14 21:41:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:02,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:02,642 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] [2019-10-14 21:41:02,642 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1075251265, now seen corresponding path program 1 times [2019-10-14 21:41:02,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230482576] [2019-10-14 21:41:02,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,741 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 21:41:02,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230482576] [2019-10-14 21:41:02,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:02,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:02,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516721483] [2019-10-14 21:41:02,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:02,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:02,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:02,744 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2019-10-14 21:41:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:02,888 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2019-10-14 21:41:02,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:02,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-14 21:41:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:02,889 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:41:02,890 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:41:02,890 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 21:41:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:41:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-10-14 21:41:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:41:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 21:41:02,898 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2019-10-14 21:41:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:02,898 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 21:41:02,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 21:41:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:41:02,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:02,900 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] [2019-10-14 21:41:02,900 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash -215297609, now seen corresponding path program 1 times [2019-10-14 21:41:02,901 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335840533] [2019-10-14 21:41:02,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:41:03,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335840533] [2019-10-14 21:41:03,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424152737] [2019-10-14 21:41:03,019 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 21:41:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:03,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:41:03,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:03,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:03,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865597073] [2019-10-14 21:41:03,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:03,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:03,159 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2019-10-14 21:41:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:03,259 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 21:41:03,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:03,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-10-14 21:41:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:03,262 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:41:03,262 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:41:03,263 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 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 21:41:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:41:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:41:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:41:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 21:41:03,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2019-10-14 21:41:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:03,277 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 21:41:03,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 21:41:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:41:03,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:03,279 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:03,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:03,481 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash -632060043, now seen corresponding path program 2 times [2019-10-14 21:41:03,482 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:03,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057263256] [2019-10-14 21:41:03,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:41:03,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057263256] [2019-10-14 21:41:03,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717659915] [2019-10-14 21:41:03,627 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 21:41:03,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:03,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:03,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:03,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:41:03,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:03,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:03,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132531853] [2019-10-14 21:41:03,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:03,737 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:03,743 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2019-10-14 21:41:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:03,961 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2019-10-14 21:41:03,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:03,962 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-10-14 21:41:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:03,963 INFO L225 Difference]: With dead ends: 84 [2019-10-14 21:41:03,963 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:41:03,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 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 21:41:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:41:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2019-10-14 21:41:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-10-14 21:41:03,972 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2019-10-14 21:41:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:03,973 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-10-14 21:41:03,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-10-14 21:41:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:41:03,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:03,975 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:04,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:04,179 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1758734551, now seen corresponding path program 3 times [2019-10-14 21:41:04,181 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:04,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846254559] [2019-10-14 21:41:04,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:04,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:04,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:05,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846254559] [2019-10-14 21:41:05,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236350702] [2019-10-14 21:41:05,154 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 21:41:05,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:05,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:05,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2019-10-14 21:41:05,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:06,221 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:06,222 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 21:41:06,224 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 21:41:06,236 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:06,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:06,243 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 21:41:06,243 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-10-14 21:41:06,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:06,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:06,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:06,509 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:06,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 36 [2019-10-14 21:41:06,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871295114] [2019-10-14 21:41:06,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:41:06,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:06,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:41:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:41:06,512 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 36 states. [2019-10-14 21:41:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:08,286 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2019-10-14 21:41:08,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:41:08,287 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 52 [2019-10-14 21:41:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:08,290 INFO L225 Difference]: With dead ends: 136 [2019-10-14 21:41:08,290 INFO L226 Difference]: Without dead ends: 130 [2019-10-14 21:41:08,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 21:41:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-14 21:41:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2019-10-14 21:41:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:41:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-10-14 21:41:08,322 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2019-10-14 21:41:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:08,323 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-10-14 21:41:08,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:41:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-10-14 21:41:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:41:08,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:08,328 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-14 21:41:08,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:08,542 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1204603161, now seen corresponding path program 4 times [2019-10-14 21:41:08,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:08,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096942205] [2019-10-14 21:41:08,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:41:08,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096942205] [2019-10-14 21:41:08,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407931968] [2019-10-14 21:41:08,663 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 21:41:08,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:08,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:08,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:08,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:41:08,806 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:08,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:08,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066622852] [2019-10-14 21:41:08,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:08,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:08,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:08,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:08,809 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2019-10-14 21:41:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:09,142 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2019-10-14 21:41:09,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:41:09,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-10-14 21:41:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:09,148 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:41:09,148 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:41:09,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 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 21:41:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:41:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-10-14 21:41:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:41:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2019-10-14 21:41:09,164 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 54 [2019-10-14 21:41:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:09,165 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2019-10-14 21:41:09,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2019-10-14 21:41:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:41:09,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:09,166 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:09,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:09,368 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1197781157, now seen corresponding path program 5 times [2019-10-14 21:41:09,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:09,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637792568] [2019-10-14 21:41:09,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:41:09,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637792568] [2019-10-14 21:41:09,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086105149] [2019-10-14 21:41:09,446 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 21:41:09,550 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:41:09,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:09,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:09,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:41:09,626 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:09,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:09,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388879271] [2019-10-14 21:41:09,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:09,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:09,628 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 14 states. [2019-10-14 21:41:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:09,952 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2019-10-14 21:41:09,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:09,952 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-10-14 21:41:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:09,953 INFO L225 Difference]: With dead ends: 131 [2019-10-14 21:41:09,953 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:41:09,954 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:41:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:41:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-10-14 21:41:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:41:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2019-10-14 21:41:09,962 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2019-10-14 21:41:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:09,962 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2019-10-14 21:41:09,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2019-10-14 21:41:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:41:09,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:09,964 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:10,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:10,176 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:10,177 INFO L82 PathProgramCache]: Analyzing trace with hash 115993883, now seen corresponding path program 6 times [2019-10-14 21:41:10,177 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:10,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765919625] [2019-10-14 21:41:10,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,845 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 20 [2019-10-14 21:41:11,002 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2019-10-14 21:41:11,144 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2019-10-14 21:41:11,289 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2019-10-14 21:41:11,428 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2019-10-14 21:41:11,853 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2019-10-14 21:41:12,017 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2019-10-14 21:41:12,174 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2019-10-14 21:41:12,327 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2019-10-14 21:41:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:14,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765919625] [2019-10-14 21:41:14,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673661471] [2019-10-14 21:41:14,951 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 21:41:15,015 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:41:15,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:15,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 93 conjunts are in the unsatisfiable core [2019-10-14 21:41:15,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:20,705 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,707 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:41:20,707 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:41:20,709 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:41:20,709 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,710 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,712 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:41:20,713 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:41:20,714 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,715 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,716 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,717 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,718 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:20,759 INFO L341 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2019-10-14 21:41:20,760 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 41 [2019-10-14 21:41:20,761 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:20,775 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:20,776 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:20,776 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:3 [2019-10-14 21:41:20,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:21,001 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:21,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 51] total 90 [2019-10-14 21:41:21,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213619914] [2019-10-14 21:41:21,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-10-14 21:41:21,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:21,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-10-14 21:41:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=7345, Unknown=0, NotChecked=0, Total=8010 [2019-10-14 21:41:21,007 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 90 states. [2019-10-14 21:41:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:35,303 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2019-10-14 21:41:35,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:41:35,303 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 66 [2019-10-14 21:41:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:35,305 INFO L225 Difference]: With dead ends: 120 [2019-10-14 21:41:35,305 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 21:41:35,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 20 SyntacticMatches, 18 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1086, Invalid=11796, Unknown=0, NotChecked=0, Total=12882 [2019-10-14 21:41:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 21:41:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2019-10-14 21:41:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:41:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2019-10-14 21:41:35,322 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 66 [2019-10-14 21:41:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:35,323 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2019-10-14 21:41:35,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-10-14 21:41:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2019-10-14 21:41:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 21:41:35,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:35,324 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-10-14 21:41:35,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:35,529 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash 818124889, now seen corresponding path program 7 times [2019-10-14 21:41:35,530 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:35,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638703063] [2019-10-14 21:41:35,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:35,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:35,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 21:41:35,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638703063] [2019-10-14 21:41:35,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835699402] [2019-10-14 21:41:35,635 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 21:41:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:35,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:35,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 21:41:35,844 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:35,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:41:35,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432416294] [2019-10-14 21:41:35,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:41:35,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:41:35,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:41:35,850 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 17 states. [2019-10-14 21:41:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:36,281 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2019-10-14 21:41:36,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:41:36,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2019-10-14 21:41:36,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:36,282 INFO L225 Difference]: With dead ends: 202 [2019-10-14 21:41:36,282 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:41:36,283 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:41:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:41:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-10-14 21:41:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:41:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-10-14 21:41:36,307 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 68 [2019-10-14 21:41:36,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:36,308 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-10-14 21:41:36,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:41:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-10-14 21:41:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:41:36,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:36,309 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2019-10-14 21:41:36,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:36,511 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1011232151, now seen corresponding path program 8 times [2019-10-14 21:41:36,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:36,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153482631] [2019-10-14 21:41:36,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:36,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:36,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-14 21:41:36,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153482631] [2019-10-14 21:41:36,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315301183] [2019-10-14 21:41:36,672 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 21:41:36,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:36,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:36,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:36,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-14 21:41:36,819 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:36,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:41:36,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475051598] [2019-10-14 21:41:36,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:41:36,820 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:36,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:41:36,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:41:36,821 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 17 states. [2019-10-14 21:41:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:37,255 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2019-10-14 21:41:37,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:41:37,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2019-10-14 21:41:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:37,256 INFO L225 Difference]: With dead ends: 161 [2019-10-14 21:41:37,257 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:41:37,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 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 21:41:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:41:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2019-10-14 21:41:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 21:41:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2019-10-14 21:41:37,264 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 70 [2019-10-14 21:41:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:37,265 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2019-10-14 21:41:37,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:41:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2019-10-14 21:41:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 21:41:37,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:37,266 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2019-10-14 21:41:37,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:37,470 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:37,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:37,471 INFO L82 PathProgramCache]: Analyzing trace with hash 185480077, now seen corresponding path program 9 times [2019-10-14 21:41:37,471 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:37,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597766776] [2019-10-14 21:41:37,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:37,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:37,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:38,275 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2019-10-14 21:41:38,467 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2019-10-14 21:41:38,651 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2019-10-14 21:41:38,890 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2019-10-14 21:41:39,148 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2019-10-14 21:41:39,356 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2019-10-14 21:41:39,543 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-10-14 21:41:39,751 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2019-10-14 21:41:39,938 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2019-10-14 21:41:40,100 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2019-10-14 21:41:40,290 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2019-10-14 21:41:40,475 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2019-10-14 21:41:40,662 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2019-10-14 21:41:40,837 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2019-10-14 21:41:41,000 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2019-10-14 21:41:41,795 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2019-10-14 21:41:41,942 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2019-10-14 21:41:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 1 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:43,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597766776] [2019-10-14 21:41:43,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161344397] [2019-10-14 21:41:43,661 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 21:41:43,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:41:43,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:43,741 WARN L254 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 118 conjunts are in the unsatisfiable core [2019-10-14 21:41:43,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:43,786 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 21:41:43,786 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:43,793 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:43,794 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 21:41:43,794 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10