/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_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:21:37,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:21:37,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:21:37,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:21:37,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:21:37,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:21:37,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:21:37,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:21:37,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:21:37,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:21:37,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:21:37,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:21:37,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:21:37,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:21:37,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:21:37,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:21:37,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:21:37,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:21:37,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:21:37,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:21:37,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:21:37,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:21:37,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:21:37,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:21:37,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:21:37,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:21:37,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:21:37,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:21:37,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:21:37,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:21:37,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:21:37,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:21:37,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:21:37,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:21:37,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:21:37,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:21:37,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:21:37,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:21:37,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:21:37,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:21:37,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:21:37,712 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 13:21:37,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:21:37,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:21:37,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:21:37,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:21:37,773 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:21:37,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:21:37,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:21:37,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:21:37,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:21:37,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:21:37,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:21:37,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:21:37,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:21:37,775 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:21:37,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:21:37,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:21:37,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:21:37,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:21:37,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:21:37,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:21:37,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:21:37,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:21:37,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:21:37,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:21:37,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:21:37,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:21:37,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:21:37,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:21:37,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:21:37,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:21:38,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:21:38,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:21:38,326 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:21:38,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:21:38,329 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:21:38,330 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-09-04 13:21:38,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ff3b7ec2/355b9f370b8a41238b78cde340985b54/FLAGde567654d [2020-09-04 13:21:39,059 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:21:39,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-09-04 13:21:39,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ff3b7ec2/355b9f370b8a41238b78cde340985b54/FLAGde567654d [2020-09-04 13:21:39,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ff3b7ec2/355b9f370b8a41238b78cde340985b54 [2020-09-04 13:21:39,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:21:39,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:21:39,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:39,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:21:39,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:21:39,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a44ffa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39, skipping insertion in model container [2020-09-04 13:21:39,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:21:39,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:21:39,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:39,677 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:21:39,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:39,711 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:21:39,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39 WrapperNode [2020-09-04 13:21:39,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:39,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:21:39,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:21:39,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:21:39,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (1/1) ... [2020-09-04 13:21:39,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:21:39,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:21:39,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:21:39,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:21:39,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (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 13:21:39,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:21:39,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:21:39,933 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 13:21:39,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:21:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:21:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:21:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 13:21:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:21:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:21:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:21:40,180 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:21:40,180 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:21:40,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:40 BoogieIcfgContainer [2020-09-04 13:21:40,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:21:40,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:21:40,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:21:40,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:21:40,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:21:39" (1/3) ... [2020-09-04 13:21:40,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb51a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:40, skipping insertion in model container [2020-09-04 13:21:40,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:39" (2/3) ... [2020-09-04 13:21:40,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb51a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:40, skipping insertion in model container [2020-09-04 13:21:40,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:40" (3/3) ... [2020-09-04 13:21:40,196 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2020-09-04 13:21:40,209 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:21:40,219 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:21:40,241 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:21:40,273 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:21:40,274 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:21:40,274 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:21:40,274 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:21:40,274 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:21:40,274 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:21:40,275 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:21:40,275 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:21:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 13:21:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:21:40,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:40,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:40,309 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:40,316 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-04 13:21:40,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:40,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469805559] [2020-09-04 13:21:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,709 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 13:21:40,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469805559] [2020-09-04 13:21:40,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:21:40,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:21:40,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201491282] [2020-09-04 13:21:40,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:21:40,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:40,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:21:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:40,742 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-04 13:21:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:40,854 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-04 13:21:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:21:40,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:21:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:40,878 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:21:40,878 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 13:21:40,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:21:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 13:21:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 13:21:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:21:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 13:21:40,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-04 13:21:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:40,960 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 13:21:40,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:21:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 13:21:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:21:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:40,969 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 13:21:40,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:21:40,971 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-04 13:21:40,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:40,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914657097] [2020-09-04 13:21:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,209 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 13:21:41,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914657097] [2020-09-04 13:21:41,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191148307] [2020-09-04 13:21:41,211 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 13:21:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:21:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:41,414 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 13:21:41,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:41,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-09-04 13:21:41,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052426195] [2020-09-04 13:21:41,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:21:41,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:21:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:21:41,419 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-09-04 13:21:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:41,499 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-04 13:21:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:21:41,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-04 13:21:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:41,501 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:21:41,502 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:21:41,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:21:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:21:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 13:21:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:21:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:21:41,511 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-04 13:21:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:41,512 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:21:41,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:21:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:21:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:21:41,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:41,514 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 13:21:41,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:21:41,729 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:41,730 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-04 13:21:41,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:41,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458904050] [2020-09-04 13:21:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,884 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 13:21:41,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458904050] [2020-09-04 13:21:41,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022917199] [2020-09-04 13:21:41,886 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 13:21:41,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:21:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:42,033 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 13:21:42,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:42,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-09-04 13:21:42,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988210424] [2020-09-04 13:21:42,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:21:42,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:21:42,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:21:42,037 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-09-04 13:21:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:42,162 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-04 13:21:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:21:42,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-04 13:21:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:42,166 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:21:42,166 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:21:42,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:21:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:21:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:21:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:21:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 13:21:42,183 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-04 13:21:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:42,184 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 13:21:42,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:21:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 13:21:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:21:42,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:42,186 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 13:21:42,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:42,401 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-04 13:21:42,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:42,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889045098] [2020-09-04 13:21:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,564 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 13:21:42,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889045098] [2020-09-04 13:21:42,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846769241] [2020-09-04 13:21:42,566 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 13:21:42,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:21:42,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:42,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:21:42,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:42,676 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 13:21:42,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:42,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-09-04 13:21:42,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499271440] [2020-09-04 13:21:42,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:21:42,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:21:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:21:42,679 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-09-04 13:21:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:42,776 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-04 13:21:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:21:42,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-04 13:21:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:42,778 INFO L225 Difference]: With dead ends: 31 [2020-09-04 13:21:42,779 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 13:21:42,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 13:21:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-04 13:21:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:21:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:21:42,787 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-04 13:21:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:42,788 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:21:42,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:21:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:21:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:21:42,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:42,790 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 13:21:42,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:42,991 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-04 13:21:42,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:42,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025579037] [2020-09-04 13:21:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,217 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 13:21:43,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025579037] [2020-09-04 13:21:43,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916448070] [2020-09-04 13:21:43,218 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 13:21:43,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:43,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:43,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:21:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:43,331 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 13:21:43,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:43,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-09-04 13:21:43,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988898829] [2020-09-04 13:21:43,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:21:43,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:43,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:21:43,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:21:43,334 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-09-04 13:21:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:43,434 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-04 13:21:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:21:43,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-04 13:21:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:43,436 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:21:43,437 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:21:43,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:21:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:21:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:21:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:21:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 13:21:43,447 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-04 13:21:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:43,448 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 13:21:43,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:21:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 13:21:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:21:43,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:43,453 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 13:21:43,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:43,670 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:43,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-04 13:21:43,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:43,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057615414] [2020-09-04 13:21:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,007 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 13:21:44,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057615414] [2020-09-04 13:21:44,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964224637] [2020-09-04 13:21:44,008 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 13:21:44,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-04 13:21:44,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:44,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:21:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:44,185 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 13:21:44,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:44,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-09-04 13:21:44,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899523502] [2020-09-04 13:21:44,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:21:44,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:44,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:21:44,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:21:44,193 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-09-04 13:21:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:44,335 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-04 13:21:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:21:44,336 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-09-04 13:21:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:44,340 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:21:44,340 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:21:44,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:21:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:21:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 13:21:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:21:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 13:21:44,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-04 13:21:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:44,350 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 13:21:44,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:21:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 13:21:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:21:44,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:44,352 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 13:21:44,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:21:44,562 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-04 13:21:44,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:44,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794449169] [2020-09-04 13:21:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:44,833 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 13:21:44,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794449169] [2020-09-04 13:21:44,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186275] [2020-09-04 13:21:44,835 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 13:21:44,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:21:44,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:21:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:44,936 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 13:21:44,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:44,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-09-04 13:21:44,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225350117] [2020-09-04 13:21:44,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:21:44,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:21:44,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:21:44,938 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-09-04 13:21:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:45,038 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-04 13:21:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:21:45,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-04 13:21:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:45,041 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:21:45,041 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:21:45,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:21:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:21:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 13:21:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:21:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 13:21:45,049 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-04 13:21:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:45,049 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 13:21:45,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:21:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 13:21:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:21:45,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:45,051 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 13:21:45,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:45,265 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-09-04 13:21:45,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:45,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939168119] [2020-09-04 13:21:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,594 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 13:21:45,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939168119] [2020-09-04 13:21:45,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174140805] [2020-09-04 13:21:45,595 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 13:21:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:21:45,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:45,737 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 13:21:45,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:45,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-09-04 13:21:45,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581458191] [2020-09-04 13:21:45,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:21:45,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:21:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:45,741 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-09-04 13:21:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:45,906 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-04 13:21:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:21:45,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-04 13:21:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:45,909 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:21:45,909 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:21:45,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:21:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:21:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-04 13:21:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:21:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:21:45,919 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-04 13:21:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:45,920 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:21:45,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:21:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:21:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 13:21:45,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:45,922 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 13:21:46,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:46,136 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-09-04 13:21:46,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:46,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988090859] [2020-09-04 13:21:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,455 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 13:21:46,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988090859] [2020-09-04 13:21:46,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629648385] [2020-09-04 13:21:46,457 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 13:21:46,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:46,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-04 13:21:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:46,611 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 13:21:46,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:46,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-09-04 13:21:46,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473720670] [2020-09-04 13:21:46,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:21:46,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:46,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:21:46,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:21:46,614 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-09-04 13:21:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:46,758 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 13:21:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:21:46,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-04 13:21:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:46,760 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:21:46,760 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:21:46,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:21:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:21:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 13:21:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:21:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 13:21:46,769 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-04 13:21:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:46,769 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 13:21:46,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:21:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 13:21:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:21:46,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:46,771 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 13:21:46,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:21:46,973 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-09-04 13:21:46,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:46,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438760840] [2020-09-04 13:21:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,318 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 13:21:47,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438760840] [2020-09-04 13:21:47,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735137395] [2020-09-04 13:21:47,320 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 13:21:47,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:21:47,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-04 13:21:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:47,480 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 13:21:47,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:47,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-09-04 13:21:47,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738669571] [2020-09-04 13:21:47,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:21:47,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:21:47,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:21:47,483 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-09-04 13:21:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:47,637 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-04 13:21:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:21:47,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-09-04 13:21:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:47,639 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:21:47,639 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:21:47,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:21:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:21:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 13:21:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:21:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 13:21:47,647 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-04 13:21:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:47,647 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 13:21:47,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:21:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 13:21:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:21:47,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:47,649 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 13:21:47,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:47,864 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-09-04 13:21:47,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:47,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723173449] [2020-09-04 13:21:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,292 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 13:21:48,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723173449] [2020-09-04 13:21:48,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166230728] [2020-09-04 13:21:48,293 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 13:21:48,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:48,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-04 13:21:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:48,439 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 13:21:48,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:48,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-09-04 13:21:48,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180019834] [2020-09-04 13:21:48,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:21:48,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:48,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:21:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:21:48,443 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-09-04 13:21:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:48,670 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-09-04 13:21:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:21:48,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 13:21:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:48,673 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:21:48,674 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:21:48,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:21:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:21:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-04 13:21:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:21:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-09-04 13:21:48,691 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-09-04 13:21:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:48,692 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-09-04 13:21:48,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:21:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-09-04 13:21:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:21:48,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:48,697 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 13:21:48,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:48,912 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-09-04 13:21:48,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:48,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801139957] [2020-09-04 13:21:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:48,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,381 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 13:21:49,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801139957] [2020-09-04 13:21:49,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836424087] [2020-09-04 13:21:49,382 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 13:21:49,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-04 13:21:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:49,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-04 13:21:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:49,560 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 13:21:49,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:49,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-09-04 13:21:49,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210734573] [2020-09-04 13:21:49,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:21:49,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:49,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:21:49,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:21:49,564 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-09-04 13:21:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:49,849 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-04 13:21:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:21:49,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-09-04 13:21:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:49,851 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:21:49,851 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 13:21:49,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:21:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 13:21:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-04 13:21:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:21:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-04 13:21:49,859 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-09-04 13:21:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:49,860 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-04 13:21:49,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:21:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-04 13:21:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 13:21:49,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:49,862 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 13:21:50,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-04 13:21:50,078 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-09-04 13:21:50,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:50,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99867619] [2020-09-04 13:21:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,635 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 13:21:50,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99867619] [2020-09-04 13:21:50,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749344927] [2020-09-04 13:21:50,636 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 13:21:50,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-04 13:21:50,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-04 13:21:50,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:50,786 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 13:21:50,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:50,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-09-04 13:21:50,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696550340] [2020-09-04 13:21:50,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 13:21:50,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 13:21:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:21:50,807 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-09-04 13:21:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:51,046 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-09-04 13:21:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 13:21:51,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-09-04 13:21:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:51,049 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:21:51,049 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:21:51,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-09-04 13:21:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:21:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-04 13:21:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:21:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 13:21:51,059 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-09-04 13:21:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:51,059 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 13:21:51,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 13:21:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 13:21:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 13:21:51,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:51,061 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 13:21:51,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:21:51,262 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:51,263 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-09-04 13:21:51,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:51,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775476914] [2020-09-04 13:21:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,986 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 13:21:51,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775476914] [2020-09-04 13:21:51,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050038925] [2020-09-04 13:21:51,994 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 13:21:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-04 13:21:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:52,268 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 13:21:52,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:52,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-09-04 13:21:52,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430282635] [2020-09-04 13:21:52,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 13:21:52,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:52,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 13:21:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:21:52,276 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-09-04 13:21:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:52,624 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-09-04 13:21:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:21:52,626 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-09-04 13:21:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:52,629 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:21:52,629 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:21:52,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 13:21:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:21:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-04 13:21:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:21:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-04 13:21:52,650 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-09-04 13:21:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:52,652 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-04 13:21:52,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 13:21:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-04 13:21:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 13:21:52,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:52,658 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 13:21:52,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:21:52,872 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-09-04 13:21:52,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:52,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011141178] [2020-09-04 13:21:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,613 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 13:21:53,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011141178] [2020-09-04 13:21:53,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833393160] [2020-09-04 13:21:53,614 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 13:21:53,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:53,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-04 13:21:53,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:53,760 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 13:21:53,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:53,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-04 13:21:53,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201088721] [2020-09-04 13:21:53,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 13:21:53,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:53,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 13:21:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:21:53,763 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-09-04 13:21:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:54,018 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-04 13:21:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:21:54,019 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-09-04 13:21:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:54,021 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:21:54,021 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:21:54,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 13:21:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:21:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-04 13:21:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 13:21:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 13:21:54,028 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-09-04 13:21:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:54,029 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 13:21:54,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 13:21:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 13:21:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 13:21:54,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:54,030 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 13:21:54,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:54,243 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-09-04 13:21:54,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:54,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596076446] [2020-09-04 13:21:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,053 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 13:21:55,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596076446] [2020-09-04 13:21:55,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445487001] [2020-09-04 13:21:55,054 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 13:21:55,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-04 13:21:55,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:55,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-04 13:21:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:55,217 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 13:21:55,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:55,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-09-04 13:21:55,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320408382] [2020-09-04 13:21:55,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 13:21:55,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:55,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 13:21:55,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:21:55,220 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-09-04 13:21:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:55,511 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-09-04 13:21:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:21:55,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-09-04 13:21:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:55,514 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:21:55,514 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:21:55,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 13:21:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:21:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-04 13:21:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 13:21:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-04 13:21:55,528 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-09-04 13:21:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:55,531 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-04 13:21:55,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 13:21:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-04 13:21:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 13:21:55,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:55,533 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 13:21:55,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-04 13:21:55,749 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-09-04 13:21:55,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:55,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831350193] [2020-09-04 13:21:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:56,817 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 13:21:56,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831350193] [2020-09-04 13:21:56,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244674613] [2020-09-04 13:21:56,819 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 13:21:56,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:56,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-04 13:21:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:57,016 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 13:21:57,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:57,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-09-04 13:21:57,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344891509] [2020-09-04 13:21:57,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 13:21:57,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 13:21:57,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:21:57,029 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-09-04 13:21:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:57,367 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-09-04 13:21:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 13:21:57,368 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-09-04 13:21:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:57,371 INFO L225 Difference]: With dead ends: 70 [2020-09-04 13:21:57,374 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:21:57,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 13:21:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:21:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 13:21:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 13:21:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-09-04 13:21:57,391 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-09-04 13:21:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:57,392 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-09-04 13:21:57,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 13:21:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-09-04 13:21:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-04 13:21:57,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:57,395 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 13:21:57,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-04 13:21:57,609 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-09-04 13:21:57,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:57,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704262651] [2020-09-04 13:21:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:57,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:57,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:57,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:57,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:57,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:57,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,535 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 13:21:58,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704262651] [2020-09-04 13:21:58,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336504882] [2020-09-04 13:21:58,536 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 [2020-09-04 13:21:58,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-04 13:21:58,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2020-09-04 13:21:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:58,733 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 13:21:58,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:58,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-09-04 13:21:58,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164665988] [2020-09-04 13:21:58,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 13:21:58,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 13:21:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:21:58,736 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-09-04 13:21:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:59,030 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-04 13:21:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:21:59,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 115 [2020-09-04 13:21:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:59,032 INFO L225 Difference]: With dead ends: 73 [2020-09-04 13:21:59,032 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 13:21:59,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 13:21:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 13:21:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-04 13:21:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 13:21:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-04 13:21:59,042 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-09-04 13:21:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:59,043 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-04 13:21:59,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 13:21:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-04 13:21:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 13:21:59,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:59,044 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:59,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-04 13:21:59,246 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-09-04 13:21:59,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:59,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267676826] [2020-09-04 13:21:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:00,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:00,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:00,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:00,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-09-04 13:22:00,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267676826] [2020-09-04 13:22:00,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954741997] [2020-09-04 13:22:00,310 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:00,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-09-04 13:22:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:00,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2020-09-04 13:22:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-09-04 13:22:00,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:00,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-09-04 13:22:00,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281407663] [2020-09-04 13:22:00,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 13:22:00,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 13:22:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-09-04 13:22:00,505 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-09-04 13:22:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:00,807 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-09-04 13:22:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 13:22:00,808 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-09-04 13:22:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:00,809 INFO L225 Difference]: With dead ends: 76 [2020-09-04 13:22:00,809 INFO L226 Difference]: Without dead ends: 72 [2020-09-04 13:22:00,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 13:22:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-04 13:22:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-09-04 13:22:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 13:22:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-04 13:22:00,815 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-09-04 13:22:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:00,815 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-04 13:22:00,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 13:22:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-04 13:22:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-04 13:22:00,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:00,817 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:01,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:01,032 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-09-04 13:22:01,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:01,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407377889] [2020-09-04 13:22:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:01,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:02,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:02,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:02,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-09-04 13:22:02,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407377889] [2020-09-04 13:22:02,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025883589] [2020-09-04 13:22:02,213 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 42 conjunts are in the unsatisfiable core [2020-09-04 13:22:02,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-09-04 13:22:02,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:02,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-09-04 13:22:02,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394771094] [2020-09-04 13:22:02,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 13:22:02,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 13:22:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:22:02,399 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-09-04 13:22:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:02,839 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-09-04 13:22:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:22:02,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-09-04 13:22:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:02,846 INFO L225 Difference]: With dead ends: 79 [2020-09-04 13:22:02,846 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 13:22:02,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 13:22:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 13:22:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-09-04 13:22:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-04 13:22:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-09-04 13:22:02,862 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-09-04 13:22:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:02,863 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-09-04 13:22:02,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 13:22:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-09-04 13:22:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-04 13:22:02,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:02,865 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:03,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:03,079 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-09-04 13:22:03,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:03,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22907298] [2020-09-04 13:22:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-09-04 13:22:04,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22907298] [2020-09-04 13:22:04,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021270140] [2020-09-04 13:22:04,340 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:04,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:04,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:04,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 44 conjunts are in the unsatisfiable core [2020-09-04 13:22:04,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-09-04 13:22:04,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:04,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-09-04 13:22:04,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465235700] [2020-09-04 13:22:04,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 13:22:04,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 13:22:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-09-04 13:22:04,575 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 27 states. [2020-09-04 13:22:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:04,998 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-04 13:22:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 13:22:04,999 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 133 [2020-09-04 13:22:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:05,001 INFO L225 Difference]: With dead ends: 82 [2020-09-04 13:22:05,001 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 13:22:05,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 13:22:05,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 13:22:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-09-04 13:22:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 13:22:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-04 13:22:05,008 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-09-04 13:22:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:05,009 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-04 13:22:05,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 13:22:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-04 13:22:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-04 13:22:05,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:05,011 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:05,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-04 13:22:05,212 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-09-04 13:22:05,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:05,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307752694] [2020-09-04 13:22:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:05,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-09-04 13:22:06,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307752694] [2020-09-04 13:22:06,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882396343] [2020-09-04 13:22:06,615 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:06,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-09-04 13:22:06,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 46 conjunts are in the unsatisfiable core [2020-09-04 13:22:06,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-09-04 13:22:06,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:06,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-09-04 13:22:06,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301335265] [2020-09-04 13:22:06,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 13:22:06,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:06,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 13:22:06,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:22:06,842 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 28 states. [2020-09-04 13:22:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:07,357 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-09-04 13:22:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:22:07,358 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 139 [2020-09-04 13:22:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:07,360 INFO L225 Difference]: With dead ends: 85 [2020-09-04 13:22:07,361 INFO L226 Difference]: Without dead ends: 81 [2020-09-04 13:22:07,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 13:22:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-04 13:22:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-04 13:22:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-04 13:22:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-04 13:22:07,368 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-09-04 13:22:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:07,369 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-04 13:22:07,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 13:22:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-04 13:22:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-04 13:22:07,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:07,371 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:07,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-04 13:22:07,586 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-09-04 13:22:07,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:07,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862435292] [2020-09-04 13:22:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:07,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:07,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:07,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:07,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:07,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:07,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:08,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-09-04 13:22:09,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862435292] [2020-09-04 13:22:09,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036700421] [2020-09-04 13:22:09,033 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:09,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:22:09,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 48 conjunts are in the unsatisfiable core [2020-09-04 13:22:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-09-04 13:22:09,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:09,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-09-04 13:22:09,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557761371] [2020-09-04 13:22:09,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 13:22:09,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 13:22:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-09-04 13:22:09,270 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 29 states. [2020-09-04 13:22:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:09,733 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-09-04 13:22:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 13:22:09,734 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 145 [2020-09-04 13:22:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:09,736 INFO L225 Difference]: With dead ends: 88 [2020-09-04 13:22:09,736 INFO L226 Difference]: Without dead ends: 84 [2020-09-04 13:22:09,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 13:22:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-04 13:22:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-09-04 13:22:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 13:22:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-04 13:22:09,747 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-09-04 13:22:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:09,748 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-04 13:22:09,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 13:22:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-04 13:22:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-04 13:22:09,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:09,750 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:09,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:09,965 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-09-04 13:22:09,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:09,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453673121] [2020-09-04 13:22:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:10,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-09-04 13:22:11,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453673121] [2020-09-04 13:22:11,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513827849] [2020-09-04 13:22:11,428 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:11,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-04 13:22:11,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 50 conjunts are in the unsatisfiable core [2020-09-04 13:22:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-09-04 13:22:11,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:11,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-09-04 13:22:11,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654853338] [2020-09-04 13:22:11,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 13:22:11,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:11,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 13:22:11,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:22:11,680 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 30 states. [2020-09-04 13:22:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:12,148 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-04 13:22:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:22:12,149 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2020-09-04 13:22:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:12,162 INFO L225 Difference]: With dead ends: 91 [2020-09-04 13:22:12,162 INFO L226 Difference]: Without dead ends: 87 [2020-09-04 13:22:12,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 13:22:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-04 13:22:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-09-04 13:22:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 13:22:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-04 13:22:12,168 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-09-04 13:22:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:12,169 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-04 13:22:12,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 13:22:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-04 13:22:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-04 13:22:12,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:12,171 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:12,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-04 13:22:12,386 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-09-04 13:22:12,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:12,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284717060] [2020-09-04 13:22:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:12,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-09-04 13:22:13,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284717060] [2020-09-04 13:22:13,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213837646] [2020-09-04 13:22:13,738 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:13,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-09-04 13:22:13,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:13,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2020-09-04 13:22:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-09-04 13:22:13,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:13,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-09-04 13:22:13,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469701166] [2020-09-04 13:22:13,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 13:22:13,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 13:22:13,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2020-09-04 13:22:13,960 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 31 states. [2020-09-04 13:22:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:14,465 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-09-04 13:22:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 13:22:14,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 157 [2020-09-04 13:22:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:14,469 INFO L225 Difference]: With dead ends: 94 [2020-09-04 13:22:14,469 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 13:22:14,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 13:22:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 13:22:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-09-04 13:22:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 13:22:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-09-04 13:22:14,480 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-09-04 13:22:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:14,480 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-09-04 13:22:14,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 13:22:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-09-04 13:22:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-04 13:22:14,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:14,483 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:14,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:14,696 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-09-04 13:22:14,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:14,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837514773] [2020-09-04 13:22:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:14,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:15,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:16,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:17,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-09-04 13:22:18,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837514773] [2020-09-04 13:22:18,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517121366] [2020-09-04 13:22:18,432 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 107 conjunts are in the unsatisfiable core [2020-09-04 13:22:18,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-09-04 13:22:18,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:18,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2020-09-04 13:22:18,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600800960] [2020-09-04 13:22:18,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-04 13:22:18,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-04 13:22:18,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 13:22:18,638 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-09-04 13:22:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:20,295 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-09-04 13:22:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 13:22:20,296 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-09-04 13:22:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:20,297 INFO L225 Difference]: With dead ends: 97 [2020-09-04 13:22:20,297 INFO L226 Difference]: Without dead ends: 93 [2020-09-04 13:22:20,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 13:22:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-04 13:22:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-09-04 13:22:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-04 13:22:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-09-04 13:22:20,304 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-09-04 13:22:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:20,304 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-09-04 13:22:20,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-04 13:22:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-09-04 13:22:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-04 13:22:20,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:20,306 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:20,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-04 13:22:20,522 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-09-04 13:22:20,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:20,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365039673] [2020-09-04 13:22:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,695 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 13:22:20,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:20,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:21,959 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 13:22:22,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-09-04 13:22:22,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365039673] [2020-09-04 13:22:22,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031260437] [2020-09-04 13:22:22,276 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:22,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:22,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 56 conjunts are in the unsatisfiable core [2020-09-04 13:22:22,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-09-04 13:22:22,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:22:22,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2020-09-04 13:22:22,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535219100] [2020-09-04 13:22:22,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 13:22:22,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:22,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 13:22:22,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 13:22:22,500 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2020-09-04 13:22:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:23,386 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-09-04 13:22:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 13:22:23,386 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-09-04 13:22:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:23,387 INFO L225 Difference]: With dead ends: 93 [2020-09-04 13:22:23,387 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:22:23,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 13:22:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:22:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:22:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:22:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:22:23,390 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2020-09-04 13:22:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:23,390 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:22:23,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 13:22:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:22:23,391 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:22:23,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-04 13:22:23,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:22:23,643 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:22:23,644 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:22:23,644 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:22:23,644 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:22:23,644 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:22:23,644 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:22:23,644 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-09-04 13:22:23,645 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-09-04 13:22:23,645 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:22:23,645 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-04 13:22:23,645 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-09-04 13:22:23,646 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 25 main_~input~0) (<= main_~input~0 25)) [2020-09-04 13:22:23,646 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-09-04 13:22:23,646 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:22:23,646 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-09-04 13:22:23,646 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-09-04 13:22:23,647 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-09-04 13:22:23,647 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-09-04 13:22:23,647 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-04 13:22:23,647 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-09-04 13:22:23,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:22:23 BoogieIcfgContainer [2020-09-04 13:22:23,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:22:23,656 INFO L168 Benchmark]: Toolchain (without parser) took 44251.06 ms. Allocated memory was 141.0 MB in the beginning and 691.0 MB in the end (delta: 550.0 MB). Free memory was 104.3 MB in the beginning and 211.9 MB in the end (delta: -107.6 MB). Peak memory consumption was 442.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:23,657 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-04 13:22:23,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.39 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:23,657 INFO L168 Benchmark]: Boogie Preprocessor took 34.40 ms. Allocated memory is still 141.0 MB. Free memory was 94.9 MB in the beginning and 93.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:23,658 INFO L168 Benchmark]: RCFGBuilder took 437.58 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 93.2 MB in the beginning and 169.4 MB in the end (delta: -76.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:23,658 INFO L168 Benchmark]: TraceAbstraction took 43466.55 ms. Allocated memory was 201.3 MB in the beginning and 691.0 MB in the end (delta: 489.7 MB). Free memory was 169.4 MB in the beginning and 211.9 MB in the end (delta: -42.5 MB). Peak memory consumption was 447.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:23,660 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.39 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.40 ms. Allocated memory is still 141.0 MB. Free memory was 94.9 MB in the beginning and 93.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.58 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 93.2 MB in the beginning and 169.4 MB in the end (delta: -76.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 43466.55 ms. Allocated memory was 201.3 MB in the beginning and 691.0 MB in the end (delta: 489.7 MB). Free memory was 169.4 MB in the beginning and 211.9 MB in the end (delta: -42.5 MB). Peak memory consumption was 447.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 43.3s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 1328 SDslu, 4759 SDs, 0 SdLazy, 3221 SolverSat, 352 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4065 GetRequests, 3204 SyntacticMatches, 2 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 25.2s InterpolantComputationTime, 4901 NumberOfCodeBlocks, 4901 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4848 ConstructedInterpolants, 0 QuantifiedInterpolants, 1488432 SizeOfPredicates, 377 NumberOfNonLiveVariables, 5720 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 20956/37908 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...