/usr/bin/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/recursive-simple/id_o20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:22:08,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:22:08,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:22:08,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:22:08,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:22:08,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:22:08,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:22:08,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:22:08,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:22:08,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:22:08,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:22:08,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:22:08,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:22:08,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:22:08,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:22:08,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:22:08,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:22:08,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:22:08,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:22:08,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:22:08,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:22:08,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:22:08,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:22:08,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:22:08,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:22:08,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:22:08,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:22:08,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:22:08,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:22:08,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:22:08,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:22:08,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:22:08,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:22:08,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:22:08,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:22:08,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:22:08,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:22:08,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:22:08,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:22:08,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:22:08,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:22:08,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:22:08,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:22:08,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:22:08,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:22:08,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:22:08,589 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:22:08,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:22:08,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:22:08,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:22:08,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:22:08,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:22:08,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:22:08,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:22:08,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:22:08,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:22:08,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:22:08,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:22:08,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:22:08,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:22:08,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:22:08,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:22:08,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:22:08,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:22:08,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:22:08,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:22:08,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:22:08,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:22:08,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:22:08,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:22:08,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:22:08,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:22:09,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:22:09,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:22:09,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:22:09,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:22:09,082 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:22:09,083 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c [2020-09-04 13:22:09,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10364b423/4ee7ea8e71a4484798a0703066d78efc/FLAG865c06fa0 [2020-09-04 13:22:09,726 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:22:09,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o20.c [2020-09-04 13:22:09,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10364b423/4ee7ea8e71a4484798a0703066d78efc/FLAG865c06fa0 [2020-09-04 13:22:10,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10364b423/4ee7ea8e71a4484798a0703066d78efc [2020-09-04 13:22:10,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:22:10,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:22:10,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:22:10,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:22:10,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:22:10,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fd9ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10, skipping insertion in model container [2020-09-04 13:22:10,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:22:10,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:22:10,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:22:10,367 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:22:10,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:22:10,409 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:22:10,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10 WrapperNode [2020-09-04 13:22:10,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:22:10,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:22:10,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:22:10,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:22:10,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... [2020-09-04 13:22:10,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:22:10,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:22:10,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:22:10,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:22:10,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:10,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:22:10,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:22:10,637 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 13:22:10,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:22:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 13:22:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:22:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 13:22:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:22:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:22:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:22:10,833 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:22:10,834 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:22:10,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:22:10 BoogieIcfgContainer [2020-09-04 13:22:10,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:22:10,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:22:10,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:22:10,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:22:10,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:22:10" (1/3) ... [2020-09-04 13:22:10,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707184c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:22:10, skipping insertion in model container [2020-09-04 13:22:10,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:10" (2/3) ... [2020-09-04 13:22:10,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707184c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:22:10, skipping insertion in model container [2020-09-04 13:22:10,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:22:10" (3/3) ... [2020-09-04 13:22:10,851 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2020-09-04 13:22:10,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:22:10,875 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:22:10,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:22:10,929 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:22:10,929 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:22:10,930 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:22:10,930 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:22:10,930 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:22:10,930 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:22:10,930 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:22:10,930 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:22:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 13:22:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:22:10,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:10,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:10,966 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-04 13:22:10,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:10,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458182881] [2020-09-04 13:22:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,307 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-09-04 13:22:11,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:22:11,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458182881] [2020-09-04 13:22:11,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:22:11,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:22:11,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565261787] [2020-09-04 13:22:11,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:22:11,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:11,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:22:11,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:22:11,451 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-04 13:22:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:11,509 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-09-04 13:22:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:22:11,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:22:11,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:11,527 INFO L225 Difference]: With dead ends: 32 [2020-09-04 13:22:11,527 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 13:22:11,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:22:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 13:22:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 13:22:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:22:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 13:22:11,586 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-04 13:22:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:11,587 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 13:22:11,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:22:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 13:22:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:22:11,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:11,589 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:11,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:22:11,590 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-04 13:22:11,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:11,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142681834] [2020-09-04 13:22:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:22:11,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142681834] [2020-09-04 13:22:11,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891582485] [2020-09-04 13:22:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-04 13:22:11,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:22:12,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:12,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-04 13:22:12,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539714534] [2020-09-04 13:22:12,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:22:12,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:22:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:22:12,067 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-09-04 13:22:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:12,112 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-04 13:22:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:22:12,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-04 13:22:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:12,114 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:22:12,114 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:22:12,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:22:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:22:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 13:22:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:22:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:22:12,123 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-04 13:22:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:12,124 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:22:12,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:22:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:22:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:22:12,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:12,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:12,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:22:12,343 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:12,344 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-04 13:22:12,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:12,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159180106] [2020-09-04 13:22:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:22:12,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159180106] [2020-09-04 13:22:12,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824210414] [2020-09-04 13:22:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:12,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:12,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:22:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:22:12,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:12,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-04 13:22:12,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092414553] [2020-09-04 13:22:12,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:22:12,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:12,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:22:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:22:12,860 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-09-04 13:22:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:12,925 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-04 13:22:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:22:12,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-09-04 13:22:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:12,929 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:22:12,929 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:22:12,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:22:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:22:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:22:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:22:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 13:22:12,941 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-04 13:22:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:12,941 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 13:22:12,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:22:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 13:22:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:22:12,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:12,944 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:13,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:13,160 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:13,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-04 13:22:13,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:13,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497919996] [2020-09-04 13:22:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:22:13,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497919996] [2020-09-04 13:22:13,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851091744] [2020-09-04 13:22:13,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:13,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:22:13,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:13,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-04 13:22:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:22:13,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:13,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-04 13:22:13,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923913778] [2020-09-04 13:22:13,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:22:13,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:22:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:22:13,562 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-09-04 13:22:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:13,626 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-04 13:22:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:22:13,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-09-04 13:22:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:13,629 INFO L225 Difference]: With dead ends: 31 [2020-09-04 13:22:13,629 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 13:22:13,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:22:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 13:22:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-04 13:22:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:22:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:22:13,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-04 13:22:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:13,637 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:22:13,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:22:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:22:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:22:13,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:13,639 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:13,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:13,854 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:13,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-04 13:22:13,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:13,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409328031] [2020-09-04 13:22:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:22:14,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409328031] [2020-09-04 13:22:14,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168736026] [2020-09-04 13:22:14,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:14,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:22:14,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:14,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-04 13:22:14,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:22:14,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:14,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-04 13:22:14,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770476235] [2020-09-04 13:22:14,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:22:14,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:14,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:22:14,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:22:14,350 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-09-04 13:22:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:14,422 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-04 13:22:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:22:14,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-09-04 13:22:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:14,424 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:22:14,425 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:22:14,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:22:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:22:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:22:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:22:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 13:22:14,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-04 13:22:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:14,433 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 13:22:14,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:22:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 13:22:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:22:14,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:14,435 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:14,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:14,649 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:14,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-04 13:22:14,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:14,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760001104] [2020-09-04 13:22:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:22:15,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760001104] [2020-09-04 13:22:15,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780511006] [2020-09-04 13:22:15,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:15,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-04 13:22:15,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:15,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-04 13:22:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:22:15,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:15,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-04 13:22:15,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179843080] [2020-09-04 13:22:15,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:22:15,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:22:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:22:15,229 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2020-09-04 13:22:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:15,338 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-04 13:22:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:22:15,339 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-09-04 13:22:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:15,340 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:22:15,340 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:22:15,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:22:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:22:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 13:22:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:22:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 13:22:15,347 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-04 13:22:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:15,348 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 13:22:15,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:22:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 13:22:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:22:15,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:15,350 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:15,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:22:15,551 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:15,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-04 13:22:15,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:15,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535608012] [2020-09-04 13:22:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:22:15,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535608012] [2020-09-04 13:22:15,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941249696] [2020-09-04 13:22:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:16,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:22:16,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-04 13:22:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:22:16,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:16,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-04 13:22:16,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877022484] [2020-09-04 13:22:16,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:22:16,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:22:16,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:22:16,140 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 18 states. [2020-09-04 13:22:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:16,296 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-04 13:22:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 13:22:16,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-09-04 13:22:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:16,300 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:22:16,300 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:22:16,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:22:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:22:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 13:22:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:22:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 13:22:16,315 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-04 13:22:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:16,315 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 13:22:16,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:22:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 13:22:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:22:16,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:16,317 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:16,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:16,531 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-09-04 13:22:16,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:16,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079508157] [2020-09-04 13:22:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:22:17,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079508157] [2020-09-04 13:22:17,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070358578] [2020-09-04 13:22:17,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-04 13:22:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:22:17,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:17,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-04 13:22:17,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273227634] [2020-09-04 13:22:17,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 13:22:17,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:17,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 13:22:17,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:22:17,195 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-09-04 13:22:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:17,388 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-04 13:22:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:22:17,389 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-09-04 13:22:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:17,391 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:22:17,391 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:22:17,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:22:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:22:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-04 13:22:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:22:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:22:17,408 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-04 13:22:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:17,409 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:22:17,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 13:22:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:22:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 13:22:17,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:17,414 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:17,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:17,632 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:17,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:17,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-09-04 13:22:17,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:17,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662404947] [2020-09-04 13:22:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:22:18,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662404947] [2020-09-04 13:22:18,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414540299] [2020-09-04 13:22:18,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:18,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:18,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 39 conjunts are in the unsatisfiable core [2020-09-04 13:22:18,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:22:18,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:18,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-04 13:22:18,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80155844] [2020-09-04 13:22:18,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 13:22:18,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 13:22:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:22:18,487 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-09-04 13:22:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:18,674 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 13:22:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 13:22:18,674 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-09-04 13:22:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:18,676 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:22:18,676 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:22:18,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:22:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:22:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 13:22:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:22:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 13:22:18,691 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-04 13:22:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:18,694 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 13:22:18,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 13:22:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 13:22:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:22:18,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:18,695 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:18,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:22:18,897 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-09-04 13:22:18,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:18,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453220377] [2020-09-04 13:22:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:22:19,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453220377] [2020-09-04 13:22:19,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802106451] [2020-09-04 13:22:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:19,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:22:19,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:19,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2020-09-04 13:22:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:22:19,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:19,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-04 13:22:19,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741212918] [2020-09-04 13:22:19,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 13:22:19,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:19,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 13:22:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:22:19,790 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-09-04 13:22:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:19,996 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-04 13:22:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 13:22:19,997 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-09-04 13:22:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:19,998 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:22:19,999 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:22:20,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:22:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:22:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 13:22:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:22:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 13:22:20,011 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-04 13:22:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:20,011 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 13:22:20,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 13:22:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 13:22:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:22:20,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:20,015 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:20,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:20,233 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:20,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-09-04 13:22:20,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:20,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679733893] [2020-09-04 13:22:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-04 13:22:21,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679733893] [2020-09-04 13:22:21,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722295602] [2020-09-04 13:22:21,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:21,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:22:21,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:21,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2020-09-04 13:22:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-04 13:22:21,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:21,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-04 13:22:21,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604217936] [2020-09-04 13:22:21,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 13:22:21,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 13:22:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:22:21,251 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2020-09-04 13:22:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:21,490 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-09-04 13:22:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 13:22:21,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-09-04 13:22:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:21,492 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:22:21,492 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:22:21,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:22:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:22:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-04 13:22:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:22:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-09-04 13:22:21,499 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-09-04 13:22:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:21,499 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-09-04 13:22:21,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 13:22:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-09-04 13:22:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:22:21,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:21,501 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:21,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:21,717 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:21,718 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-09-04 13:22:21,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:21,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286087092] [2020-09-04 13:22:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-04 13:22:22,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286087092] [2020-09-04 13:22:22,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801777298] [2020-09-04 13:22:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:38,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-04 13:22:38,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:38,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 51 conjunts are in the unsatisfiable core [2020-09-04 13:22:38,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-04 13:22:38,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:38,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-04 13:22:38,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060949399] [2020-09-04 13:22:38,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 13:22:38,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:38,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 13:22:38,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:22:38,523 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 28 states. [2020-09-04 13:22:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:38,811 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-04 13:22:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 13:22:38,811 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-09-04 13:22:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:38,812 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:22:38,813 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 13:22:38,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:22:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 13:22:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-04 13:22:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:22:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-04 13:22:38,820 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-09-04 13:22:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:38,820 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-04 13:22:38,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 13:22:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-04 13:22:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 13:22:38,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:38,822 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:39,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-04 13:22:39,028 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-09-04 13:22:39,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:39,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439818962] [2020-09-04 13:22:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-04 13:22:40,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439818962] [2020-09-04 13:22:40,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660645052] [2020-09-04 13:22:40,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:40,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-04 13:22:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 55 conjunts are in the unsatisfiable core [2020-09-04 13:22:40,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-04 13:22:40,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:40,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-09-04 13:22:40,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584457814] [2020-09-04 13:22:40,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 13:22:40,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:40,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 13:22:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:22:40,436 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 30 states. [2020-09-04 13:22:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:40,770 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-09-04 13:22:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 13:22:40,770 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-09-04 13:22:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:40,772 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:22:40,772 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:22:40,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:22:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:22:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-04 13:22:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:22:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 13:22:40,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-09-04 13:22:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:40,780 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 13:22:40,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 13:22:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 13:22:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 13:22:40,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:40,782 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:40,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:22:40,988 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-09-04 13:22:40,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:40,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310791569] [2020-09-04 13:22:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-04 13:22:42,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310791569] [2020-09-04 13:22:42,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065439846] [2020-09-04 13:22:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 59 conjunts are in the unsatisfiable core [2020-09-04 13:22:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-04 13:22:42,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:42,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-09-04 13:22:42,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501363959] [2020-09-04 13:22:42,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 13:22:42,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 13:22:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-09-04 13:22:42,289 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 32 states. [2020-09-04 13:22:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:42,772 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-09-04 13:22:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 13:22:42,772 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2020-09-04 13:22:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:42,773 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:22:42,774 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:22:42,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-09-04 13:22:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:22:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-04 13:22:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:22:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-04 13:22:42,780 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-09-04 13:22:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:42,780 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-04 13:22:42,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 13:22:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-04 13:22:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 13:22:42,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:42,782 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:42,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:22:42,996 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-09-04 13:22:42,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:42,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470626919] [2020-09-04 13:22:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-04 13:22:44,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470626919] [2020-09-04 13:22:44,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425198046] [2020-09-04 13:22:44,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:44,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:44,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:44,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 63 conjunts are in the unsatisfiable core [2020-09-04 13:22:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-04 13:22:44,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:44,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-09-04 13:22:44,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855324715] [2020-09-04 13:22:44,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 13:22:44,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 13:22:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 13:22:44,387 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-09-04 13:22:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:44,905 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-04 13:22:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 13:22:44,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-09-04 13:22:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:44,907 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:22:44,907 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:22:44,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 13:22:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:22:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-04 13:22:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 13:22:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 13:22:44,919 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-09-04 13:22:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:44,920 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 13:22:44,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 13:22:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 13:22:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 13:22:44,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:44,921 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:45,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:45,137 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-09-04 13:22:45,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:45,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764321048] [2020-09-04 13:22:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-09-04 13:22:46,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764321048] [2020-09-04 13:22:46,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061339222] [2020-09-04 13:22:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:47,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-04 13:22:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:47,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 68 conjunts are in the unsatisfiable core [2020-09-04 13:22:47,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-09-04 13:22:47,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:47,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-09-04 13:22:47,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601622734] [2020-09-04 13:22:47,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 13:22:47,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:47,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 13:22:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 13:22:47,332 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 36 states. [2020-09-04 13:22:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:47,968 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-09-04 13:22:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 13:22:47,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2020-09-04 13:22:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:47,971 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:22:47,971 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:22:47,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 13:22:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:22:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-04 13:22:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 13:22:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-04 13:22:47,978 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-09-04 13:22:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-04 13:22:47,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 13:22:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-04 13:22:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 13:22:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:47,980 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:48,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-04 13:22:48,185 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-09-04 13:22:48,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:48,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836274450] [2020-09-04 13:22:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-09-04 13:22:49,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836274450] [2020-09-04 13:22:49,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389145196] [2020-09-04 13:22:49,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:49,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:22:49,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 71 conjunts are in the unsatisfiable core [2020-09-04 13:22:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-09-04 13:22:49,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:49,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-09-04 13:22:49,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509435754] [2020-09-04 13:22:49,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 13:22:49,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 13:22:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 13:22:49,853 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 38 states. [2020-09-04 13:22:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:50,546 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-09-04 13:22:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 13:22:50,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2020-09-04 13:22:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:50,548 INFO L225 Difference]: With dead ends: 70 [2020-09-04 13:22:50,549 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:22:50,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 13:22:50,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:22:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 13:22:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 13:22:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-09-04 13:22:50,560 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-09-04 13:22:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:50,561 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-09-04 13:22:50,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 13:22:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-09-04 13:22:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-04 13:22:50,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:50,563 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:50,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-04 13:22:50,764 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-09-04 13:22:50,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:50,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720256855] [2020-09-04 13:22:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:50,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:50,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:50,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:50,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:51,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:52,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:52,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:52,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-09-04 13:22:52,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720256855] [2020-09-04 13:22:52,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619113092] [2020-09-04 13:22:52,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true