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_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:49,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:49,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:49,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:49,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:49,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:49,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:49,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:49,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:49,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:49,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:49,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:49,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:49,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:49,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:49,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:49,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:49,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:49,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:49,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:49,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:49,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:49,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:49,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:49,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:41:49,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:41:49,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:41:49,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:41:49,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:41:49,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:41:49,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:49,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:49,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:49,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:49,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:49,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:49,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:49,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:49,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:49,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:49,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:49,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:41:49,509 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:49,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:49,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:49,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:49,512 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:49,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:49,512 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:49,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:49,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:49,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:49,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:49,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:49,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:49,515 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:49,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:49,516 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:49,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:49,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:49,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:49,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:49,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:49,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:49,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:49,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:49,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:49,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:49,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:49,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:49,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:49,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:49,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:49,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:49,846 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:49,847 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:49,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2019-10-14 21:41:49,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92426205/28db04832b14474ea1198e4ab1c9d35f/FLAG49b9f3e64 [2019-10-14 21:41:50,420 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:50,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2019-10-14 21:41:50,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92426205/28db04832b14474ea1198e4ab1c9d35f/FLAG49b9f3e64 [2019-10-14 21:41:50,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92426205/28db04832b14474ea1198e4ab1c9d35f [2019-10-14 21:41:50,804 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:50,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:50,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:50,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:50,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:50,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:50" (1/1) ... [2019-10-14 21:41:50,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a958aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:50, skipping insertion in model container [2019-10-14 21:41:50,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:50" (1/1) ... [2019-10-14 21:41:50,823 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:50,844 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:51,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:51,077 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:51,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:51,214 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:51,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51 WrapperNode [2019-10-14 21:41:51,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:51,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:51,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:51,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:51,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (1/1) ... [2019-10-14 21:41:51,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:51,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:51,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:51,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:51,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (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 21:41:51,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:51,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:51,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:51,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-14 21:41:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:41:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:51,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:51,630 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:51,631 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:41:51,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:51 BoogieIcfgContainer [2019-10-14 21:41:51,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:51,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:51,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:51,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:51,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:50" (1/3) ... [2019-10-14 21:41:51,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68014881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:51, skipping insertion in model container [2019-10-14 21:41:51,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:51" (2/3) ... [2019-10-14 21:41:51,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68014881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:51, skipping insertion in model container [2019-10-14 21:41:51,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:51" (3/3) ... [2019-10-14 21:41:51,642 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2019-10-14 21:41:51,654 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:51,663 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:51,679 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:51,725 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:51,726 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:51,726 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:51,726 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:51,726 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:51,726 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:51,726 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:51,727 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2019-10-14 21:41:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:51,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:51,755 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 21:41:51,757 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2099146995, now seen corresponding path program 1 times [2019-10-14 21:41:51,768 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:51,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743843432] [2019-10-14 21:41:51,769 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:51,769 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:51,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:51,942 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 21:41:51,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743843432] [2019-10-14 21:41:51,944 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:51,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:51,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176585049] [2019-10-14 21:41:51,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:51,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:51,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:51,968 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2019-10-14 21:41:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:52,151 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2019-10-14 21:41:52,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:52,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-14 21:41:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:52,162 INFO L225 Difference]: With dead ends: 83 [2019-10-14 21:41:52,162 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:41:52,166 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 21:41:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:41:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 21:41:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:41:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-14 21:41:52,204 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-10-14 21:41:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:52,205 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-14 21:41:52,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-14 21:41:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:52,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:52,207 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 21:41:52,208 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2130853259, now seen corresponding path program 1 times [2019-10-14 21:41:52,209 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:52,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446857100] [2019-10-14 21:41:52,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:52,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446857100] [2019-10-14 21:41:52,413 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:52,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:52,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191927231] [2019-10-14 21:41:52,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:52,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:52,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:52,420 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2019-10-14 21:41:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:52,629 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-10-14 21:41:52,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:52,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-14 21:41:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:52,632 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:41:52,632 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:41:52,634 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 21:41:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:41:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 21:41:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-10-14 21:41:52,645 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-10-14 21:41:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:52,646 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-10-14 21:41:52,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-10-14 21:41:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:41:52,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:52,648 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:52,648 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1966572211, now seen corresponding path program 1 times [2019-10-14 21:41:52,649 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:52,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167121601] [2019-10-14 21:41:52,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,755 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 21:41:52,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167121601] [2019-10-14 21:41:52,756 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:52,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:52,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105367507] [2019-10-14 21:41:52,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:52,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:52,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:52,759 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 4 states. [2019-10-14 21:41:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:52,890 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-10-14 21:41:52,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:52,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-14 21:41:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:52,892 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:41:52,892 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:41:52,893 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 21:41:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:41:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 21:41:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:41:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-10-14 21:41:52,902 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-10-14 21:41:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:52,902 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-10-14 21:41:52,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-10-14 21:41:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:52,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:52,904 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:52,904 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1207168369, now seen corresponding path program 1 times [2019-10-14 21:41:52,905 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:52,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920783750] [2019-10-14 21:41:52,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,004 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 21:41:53,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920783750] [2019-10-14 21:41:53,005 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:53,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:53,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006384787] [2019-10-14 21:41:53,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:53,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:53,007 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 5 states. [2019-10-14 21:41:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:53,188 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2019-10-14 21:41:53,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:53,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-14 21:41:53,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:53,190 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:41:53,190 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:41:53,191 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 21:41:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:41:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-10-14 21:41:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:41:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-14 21:41:53,209 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-10-14 21:41:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:53,209 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-14 21:41:53,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-14 21:41:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:41:53,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:53,211 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] [2019-10-14 21:41:53,211 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1413365853, now seen corresponding path program 1 times [2019-10-14 21:41:53,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:53,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965400960] [2019-10-14 21:41:53,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:53,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965400960] [2019-10-14 21:41:53,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585214082] [2019-10-14 21:41:53,304 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 21:41:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:53,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:53,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:53,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:53,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145101045] [2019-10-14 21:41:53,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:53,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:53,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:53,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:53,441 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 7 states. [2019-10-14 21:41:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:53,595 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-10-14 21:41:53,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:53,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-14 21:41:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:53,597 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:41:53,597 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:41:53,599 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 [2019-10-14 21:41:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:41:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 21:41:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:41:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-10-14 21:41:53,608 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2019-10-14 21:41:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:53,609 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-10-14 21:41:53,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-10-14 21:41:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:41:53,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:53,614 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] [2019-10-14 21:41:53,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:53,815 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:53,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:53,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1166217631, now seen corresponding path program 2 times [2019-10-14 21:41:53,816 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:53,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661996834] [2019-10-14 21:41:53,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:41:53,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661996834] [2019-10-14 21:41:53,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767428696] [2019-10-14 21:41:53,968 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 21:41:54,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:54,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:54,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:54,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:41:54,098 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:54,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:54,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295720204] [2019-10-14 21:41:54,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:54,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:54,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:54,105 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-10-14 21:41:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:54,350 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2019-10-14 21:41:54,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:54,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2019-10-14 21:41:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:54,352 INFO L225 Difference]: With dead ends: 106 [2019-10-14 21:41:54,352 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:41:54,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:41:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2019-10-14 21:41:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:41:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-10-14 21:41:54,365 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2019-10-14 21:41:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:54,366 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-10-14 21:41:54,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-10-14 21:41:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:41:54,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:54,368 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] [2019-10-14 21:41:54,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:54,571 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash -419525295, now seen corresponding path program 3 times [2019-10-14 21:41:54,573 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:54,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531319577] [2019-10-14 21:41:54,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:56,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531319577] [2019-10-14 21:41:56,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645797874] [2019-10-14 21:41:56,613 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 21:41:56,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:56,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:56,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-14 21:41:56,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:02,901 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:02,902 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 21:42:02,903 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 21:42:02,915 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:02,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:02,920 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:42:02,921 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-10-14 21:42:03,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:03,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:03,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:03,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:03,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 50] total 81 [2019-10-14 21:42:03,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930912606] [2019-10-14 21:42:03,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-10-14 21:42:03,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-10-14 21:42:03,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=6189, Unknown=0, NotChecked=0, Total=6480 [2019-10-14 21:42:03,443 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 81 states. [2019-10-14 21:42:21,772 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44