java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:42:40,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:42:40,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:42:40,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:42:40,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:42:40,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:42:40,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:42:40,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:42:40,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:42:40,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:42:40,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:42:40,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:42:40,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:42:40,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:42:40,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:42:40,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:42:40,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:42:40,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:42:40,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:42:40,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:42:40,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:42:40,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:42:40,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:42:40,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:42:40,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:42:40,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:42:40,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:42:40,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:42:40,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:42:40,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:42:40,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:42:40,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:42:40,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:42:40,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:42:40,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:42:40,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:42:40,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:42:40,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:42:40,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:42:40,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:42:40,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:42:40,583 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 [2019-10-13 17:42:40,604 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:42:40,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:42:40,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:42:40,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:42:40,606 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:42:40,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:42:40,607 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:42:40,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:42:40,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:42:40,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:42:40,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:42:40,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:42:40,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:42:40,609 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:42:40,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:42:40,610 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:42:40,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:42:40,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:42:40,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:42:40,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:42:40,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:42:40,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:40,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:42:40,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:42:40,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:42:40,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:42:40,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:42:40,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:42:40,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:42:40,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:42:40,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:42:40,935 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:42:40,936 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:42:40,937 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:42:40,937 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-10-13 17:42:41,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa9d35ece/b00b42238caa41cf967610fd7ad7ff3f/FLAGf4567e48f [2019-10-13 17:42:41,460 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:42:41,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-10-13 17:42:41,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa9d35ece/b00b42238caa41cf967610fd7ad7ff3f/FLAGf4567e48f [2019-10-13 17:42:41,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa9d35ece/b00b42238caa41cf967610fd7ad7ff3f [2019-10-13 17:42:41,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:42:41,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:42:41,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:41,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:42:41,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:42:41,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705ef929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41, skipping insertion in model container [2019-10-13 17:42:41,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,849 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:42:41,868 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:42:42,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:42,078 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:42:42,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:42,218 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:42:42,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42 WrapperNode [2019-10-13 17:42:42,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:42,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:42:42,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:42:42,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:42:42,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:42:42,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:42:42,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:42:42,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:42:42,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (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 [2019-10-13 17:42:42,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:42:42,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:42:42,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:42:42,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:42:42,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:42:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:42:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:42:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 17:42:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:42:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:42:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:42:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:42:42,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:42:42,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:42:42,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:42:42,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:42:42,685 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:42:42,685 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-13 17:42:42,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:42 BoogieIcfgContainer [2019-10-13 17:42:42,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:42:42,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:42:42,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:42:42,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:42:42,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:42:41" (1/3) ... [2019-10-13 17:42:42,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4194d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:42, skipping insertion in model container [2019-10-13 17:42:42,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (2/3) ... [2019-10-13 17:42:42,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4194d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:42, skipping insertion in model container [2019-10-13 17:42:42,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:42" (3/3) ... [2019-10-13 17:42:42,695 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2019-10-13 17:42:42,704 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:42:42,710 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:42:42,719 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:42:42,745 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:42:42,746 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:42:42,746 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:42:42,746 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:42:42,746 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:42:42,746 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:42:42,746 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:42:42,747 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:42:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-13 17:42:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:42:42,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:42,775 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] [2019-10-13 17:42:42,777 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-10-13 17:42:42,788 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:42,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446400442] [2019-10-13 17:42:42,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:42,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446400442] [2019-10-13 17:42:42,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:42,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:42:42,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051340991] [2019-10-13 17:42:42,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:42:42,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:42:42,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:42,996 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-13 17:42:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:43,219 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2019-10-13 17:42:43,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:42:43,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-13 17:42:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:43,233 INFO L225 Difference]: With dead ends: 81 [2019-10-13 17:42:43,234 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 17:42:43,240 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 [2019-10-13 17:42:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 17:42:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 17:42:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 17:42:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-13 17:42:43,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-10-13 17:42:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:43,309 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-13 17:42:43,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:42:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-13 17:42:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:42:43,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:43,311 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] [2019-10-13 17:42:43,311 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-10-13 17:42:43,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:43,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223566919] [2019-10-13 17:42:43,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:43,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223566919] [2019-10-13 17:42:43,464 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:43,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:42:43,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486165353] [2019-10-13 17:42:43,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:43,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:43,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:43,469 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2019-10-13 17:42:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:43,695 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-10-13 17:42:43,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:43,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-13 17:42:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:43,698 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:42:43,698 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 17:42:43,701 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 [2019-10-13 17:42:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 17:42:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-13 17:42:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:42:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-10-13 17:42:43,724 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-10-13 17:42:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:43,725 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-10-13 17:42:43,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-10-13 17:42:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:42:43,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:43,730 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:43,732 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:43,733 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-10-13 17:42:43,733 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:43,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230973941] [2019-10-13 17:42:43,734 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:42:43,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230973941] [2019-10-13 17:42:43,892 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:43,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:42:43,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904405482] [2019-10-13 17:42:43,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:43,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:43,894 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 4 states. [2019-10-13 17:42:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,012 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-10-13 17:42:44,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:42:44,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-13 17:42:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,014 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:42:44,014 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:42:44,015 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 [2019-10-13 17:42:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:42:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-13 17:42:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 17:42:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-10-13 17:42:44,024 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-10-13 17:42:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,024 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-10-13 17:42:44,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-10-13 17:42:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:42:44,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,026 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,026 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-10-13 17:42:44,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849387337] [2019-10-13 17:42:44,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:44,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849387337] [2019-10-13 17:42:44,123 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:44,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:42:44,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300089964] [2019-10-13 17:42:44,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:42:44,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:42:44,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:42:44,125 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 5 states. [2019-10-13 17:42:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,278 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-10-13 17:42:44,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:44,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-13 17:42:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,280 INFO L225 Difference]: With dead ends: 95 [2019-10-13 17:42:44,280 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 17:42:44,281 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 [2019-10-13 17:42:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 17:42:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-13 17:42:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:42:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-13 17:42:44,289 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-10-13 17:42:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,289 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-13 17:42:44,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:42:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-13 17:42:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 17:42:44,292 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,293 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,293 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-10-13 17:42:44,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856916337] [2019-10-13 17:42:44,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:42:44,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856916337] [2019-10-13 17:42:44,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753247509] [2019-10-13 17:42:44,436 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 [2019-10-13 17:42:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:44,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:42:44,575 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:44,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:42:44,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682781473] [2019-10-13 17:42:44,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:42:44,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:44,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:42:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:44,577 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 7 states. [2019-10-13 17:42:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,747 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-10-13 17:42:44,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:44,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-13 17:42:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,749 INFO L225 Difference]: With dead ends: 87 [2019-10-13 17:42:44,749 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 17:42:44,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 17:42:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-13 17:42:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:42:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-10-13 17:42:44,763 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2019-10-13 17:42:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,764 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-10-13 17:42:44,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:42:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-10-13 17:42:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 17:42:44,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,773 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:44,979 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,980 INFO L82 PathProgramCache]: Analyzing trace with hash 589604962, now seen corresponding path program 2 times [2019-10-13 17:42:44,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89286533] [2019-10-13 17:42:44,981 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 17:42:45,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89286533] [2019-10-13 17:42:45,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967568737] [2019-10-13 17:42:45,110 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 [2019-10-13 17:42:45,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:42:45,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:45,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:45,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 17:42:45,272 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:45,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 17:42:45,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403155798] [2019-10-13 17:42:45,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:42:45,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:42:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:45,274 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-10-13 17:42:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:45,495 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2019-10-13 17:42:45,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:42:45,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2019-10-13 17:42:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:45,496 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:42:45,496 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:42:45,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:42:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2019-10-13 17:42:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:42:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-10-13 17:42:45,505 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2019-10-13 17:42:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:45,506 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-10-13 17:42:45,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:42:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-10-13 17:42:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 17:42:45,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,507 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:45,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:45,711 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1474058926, now seen corresponding path program 3 times [2019-10-13 17:42:45,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792483738] [2019-10-13 17:42:45,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:47,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792483738] [2019-10-13 17:42:47,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657571338] [2019-10-13 17:42:47,256 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 [2019-10-13 17:42:47,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:42:47,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:47,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 88 conjunts are in the unsatisfiable core [2019-10-13 17:42:47,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:48,814 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:48,815 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 15 treesize of output 16 [2019-10-13 17:42:48,816 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-13 17:42:48,828 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:48,829 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 17:42:48,830 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2019-10-13 17:42:48,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:48,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:48,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:49,058 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:49,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28] total 45 [2019-10-13 17:42:49,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106845153] [2019-10-13 17:42:49,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-13 17:42:49,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-13 17:42:49,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2019-10-13 17:42:49,061 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 45 states. [2019-10-13 17:42:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:51,785 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2019-10-13 17:42:51,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:42:51,787 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 64 [2019-10-13 17:42:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:51,790 INFO L225 Difference]: With dead ends: 174 [2019-10-13 17:42:51,790 INFO L226 Difference]: Without dead ends: 168 [2019-10-13 17:42:51,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 37 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=316, Invalid=3466, Unknown=0, NotChecked=0, Total=3782 [2019-10-13 17:42:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-13 17:42:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2019-10-13 17:42:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-13 17:42:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2019-10-13 17:42:51,806 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2019-10-13 17:42:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:51,806 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2019-10-13 17:42:51,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-13 17:42:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2019-10-13 17:42:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:42:51,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:51,808 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:52,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:52,013 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1815286352, now seen corresponding path program 4 times [2019-10-13 17:42:52,014 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:52,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522153375] [2019-10-13 17:42:52,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:52,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:52,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 17:42:52,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522153375] [2019-10-13 17:42:52,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137862286] [2019-10-13 17:42:52,107 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 [2019-10-13 17:42:52,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:42:52,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:52,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:52,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 17:42:52,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:52,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:52,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392722133] [2019-10-13 17:42:52,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:52,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:52,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:52,240 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 14 states. [2019-10-13 17:42:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:52,761 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2019-10-13 17:42:52,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:42:52,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 17:42:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:52,766 INFO L225 Difference]: With dead ends: 237 [2019-10-13 17:42:52,767 INFO L226 Difference]: Without dead ends: 139 [2019-10-13 17:42:52,768 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:42:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-13 17:42:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2019-10-13 17:42:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 17:42:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2019-10-13 17:42:52,809 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 66 [2019-10-13 17:42:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:52,810 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2019-10-13 17:42:52,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2019-10-13 17:42:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:42:52,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:52,817 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:53,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:53,022 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:53,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1556829298, now seen corresponding path program 5 times [2019-10-13 17:42:53,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:53,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927311595] [2019-10-13 17:42:53,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:53,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:53,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 17:42:53,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927311595] [2019-10-13 17:42:53,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311411428] [2019-10-13 17:42:53,132 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 [2019-10-13 17:42:53,311 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 17:42:53,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:53,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:53,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 17:42:53,393 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:53,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:53,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936541472] [2019-10-13 17:42:53,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:53,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:53,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:53,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:53,396 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 14 states. [2019-10-13 17:42:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:53,891 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2019-10-13 17:42:53,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:42:53,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2019-10-13 17:42:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:53,893 INFO L225 Difference]: With dead ends: 132 [2019-10-13 17:42:53,894 INFO L226 Difference]: Without dead ends: 91 [2019-10-13 17:42:53,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:42:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-13 17:42:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-10-13 17:42:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:42:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2019-10-13 17:42:53,904 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2019-10-13 17:42:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:53,904 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2019-10-13 17:42:53,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2019-10-13 17:42:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:42:53,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:53,906 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:54,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:54,110 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash 249886016, now seen corresponding path program 6 times [2019-10-13 17:42:54,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:54,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185097078] [2019-10-13 17:42:54,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,411 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-10-13 17:42:55,582 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-10-13 17:42:55,717 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2019-10-13 17:42:56,220 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-10-13 17:42:56,438 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-13 17:42:56,624 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2019-10-13 17:42:56,829 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-10-13 17:42:57,034 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2019-10-13 17:42:57,389 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2019-10-13 17:42:57,572 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-10-13 17:42:57,800 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-10-13 17:42:58,138 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-10-13 17:42:58,601 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2019-10-13 17:42:58,800 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2019-10-13 17:42:59,007 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-10-13 17:42:59,195 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-10-13 17:42:59,408 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-13 17:42:59,905 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2019-10-13 17:43:00,122 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2019-10-13 17:43:00,758 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2019-10-13 17:43:00,970 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2019-10-13 17:43:01,201 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2019-10-13 17:43:01,396 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2019-10-13 17:43:01,564 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2019-10-13 17:43:02,163 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-10-13 17:43:02,346 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-10-13 17:43:02,530 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2019-10-13 17:43:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:03,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185097078] [2019-10-13 17:43:03,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883021172] [2019-10-13 17:43:03,662 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 [2019-10-13 17:43:03,730 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 17:43:03,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:03,733 WARN L254 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 118 conjunts are in the unsatisfiable core [2019-10-13 17:43:03,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:10,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:10,994 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:10,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 123 [2019-10-13 17:43:10,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705902594] [2019-10-13 17:43:10,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-10-13 17:43:10,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-10-13 17:43:11,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1065, Invalid=13941, Unknown=0, NotChecked=0, Total=15006 [2019-10-13 17:43:11,000 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 123 states. [2019-10-13 17:43:12,462 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2019-10-13 17:43:12,818 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2019-10-13 17:43:13,271 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 59 [2019-10-13 17:43:13,609 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2019-10-13 17:43:14,107 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2019-10-13 17:43:14,476 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 96 [2019-10-13 17:43:15,514 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 51 [2019-10-13 17:43:15,743 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2019-10-13 17:43:16,165 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 52 [2019-10-13 17:43:16,875 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2019-10-13 17:43:17,786 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2019-10-13 17:43:18,177 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 58 [2019-10-13 17:43:19,489 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 82 [2019-10-13 17:43:20,324 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2019-10-13 17:43:21,539 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2019-10-13 17:43:23,437 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 46