/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_i20_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:21:34,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:21:34,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:21:34,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:21:34,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:21:34,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:21:34,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:21:34,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:21:34,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:21:34,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:21:34,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:21:34,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:21:34,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:21:34,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:21:34,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:21:34,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:21:34,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:21:34,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:21:34,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:21:34,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:21:34,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:21:34,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:21:34,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:21:34,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:21:34,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:21:34,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:21:34,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:21:34,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:21:34,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:21:34,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:21:34,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:21:34,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:21:34,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:21:34,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:21:34,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:21:34,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:21:34,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:21:34,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:21:34,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:21:34,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:21:34,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:21:34,672 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 13:21:34,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:21:34,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:21:34,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:21:34,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:21:34,720 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:21:34,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:21:34,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:21:34,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:21:34,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:21:34,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:21:34,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:21:34,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:21:34,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:21:34,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:21:34,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:21:34,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:21:34,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:21:34,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:21:34,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:21:34,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:21:34,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:21:34,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:21:34,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:21:34,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:21:34,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:21:34,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:21:34,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:21:34,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:21:34,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:21:34,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:21:35,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:21:35,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:21:35,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:21:35,189 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:21:35,191 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:21:35,193 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-09-04 13:21:35,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a78dce93/0c75d7cb31144fc296434e3225b76cd4/FLAG22f940d58 [2020-09-04 13:21:35,838 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:21:35,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-09-04 13:21:35,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a78dce93/0c75d7cb31144fc296434e3225b76cd4/FLAG22f940d58 [2020-09-04 13:21:36,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a78dce93/0c75d7cb31144fc296434e3225b76cd4 [2020-09-04 13:21:36,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:21:36,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:21:36,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:36,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:21:36,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:21:36,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef6092a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36, skipping insertion in model container [2020-09-04 13:21:36,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:21:36,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:21:36,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:36,469 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:21:36,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:36,507 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:21:36,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36 WrapperNode [2020-09-04 13:21:36,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:36,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:21:36,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:21:36,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:21:36,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (1/1) ... [2020-09-04 13:21:36,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:21:36,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:21:36,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:21:36,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:21:36,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (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 13:21:36,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:21:36,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:21:36,697 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 13:21:36,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:21:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:21:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:21:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 13:21:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:21:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:21:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:21:36,884 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:21:36,885 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:21:36,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:36 BoogieIcfgContainer [2020-09-04 13:21:36,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:21:36,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:21:36,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:21:36,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:21:36,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:21:36" (1/3) ... [2020-09-04 13:21:36,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232d9e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:36, skipping insertion in model container [2020-09-04 13:21:36,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:36" (2/3) ... [2020-09-04 13:21:36,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232d9e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:36, skipping insertion in model container [2020-09-04 13:21:36,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:36" (3/3) ... [2020-09-04 13:21:36,899 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-09-04 13:21:36,909 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:21:36,919 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:21:36,940 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:21:36,969 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:21:36,969 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:21:36,970 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:21:36,970 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:21:36,970 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:21:36,970 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:21:36,970 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:21:36,970 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:21:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 13:21:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:21:36,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:36,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:36,997 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:37,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-04 13:21:37,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:37,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296193446] [2020-09-04 13:21:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,308 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 13:21:37,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296193446] [2020-09-04 13:21:37,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:21:37,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:21:37,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686379922] [2020-09-04 13:21:37,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:21:37,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:21:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:37,346 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-04 13:21:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:37,434 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-04 13:21:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:21:37,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:21:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:37,452 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:21:37,452 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 13:21:37,457 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 13:21:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 13:21:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 13:21:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:21:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 13:21:37,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-04 13:21:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:37,519 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 13:21:37,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:21:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 13:21:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:21:37,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:37,522 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 13:21:37,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:21:37,523 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-04 13:21:37,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:37,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442214239] [2020-09-04 13:21:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,734 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 13:21:37,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442214239] [2020-09-04 13:21:37,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743415998] [2020-09-04 13:21:37,736 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 13:21:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:21:37,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:37,923 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 13:21:37,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:37,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-09-04 13:21:37,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235071542] [2020-09-04 13:21:37,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:21:37,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:21:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:21:37,929 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-09-04 13:21:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:37,990 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-04 13:21:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:21:37,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-04 13:21:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:37,992 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:21:37,992 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:21:37,994 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 13:21:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:21:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 13:21:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:21:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:21:38,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-04 13:21:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:38,002 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:21:38,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:21:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:21:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:21:38,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:38,004 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 13:21:38,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:21:38,217 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-04 13:21:38,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:38,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381998390] [2020-09-04 13:21:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,359 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 13:21:38,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381998390] [2020-09-04 13:21:38,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693016797] [2020-09-04 13:21:38,360 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 13:21:38,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:38,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:38,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:21:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:38,480 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 13:21:38,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:38,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-09-04 13:21:38,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283595168] [2020-09-04 13:21:38,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:21:38,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:38,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:21:38,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:21:38,484 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-09-04 13:21:38,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:38,580 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-04 13:21:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:21:38,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-04 13:21:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:38,583 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:21:38,583 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:21:38,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:21:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:21:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:21:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:21:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 13:21:38,611 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-04 13:21:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:38,612 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 13:21:38,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:21:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 13:21:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:21:38,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:38,614 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 13:21:38,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:38,828 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-04 13:21:38,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:38,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861060415] [2020-09-04 13:21:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,996 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 13:21:38,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861060415] [2020-09-04 13:21:38,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968207424] [2020-09-04 13:21:38,997 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 13:21:39,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:21:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:21:39,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:39,185 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 13:21:39,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:39,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-09-04 13:21:39,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571567306] [2020-09-04 13:21:39,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:21:39,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:21:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:21:39,188 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2020-09-04 13:21:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:39,392 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-04 13:21:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:21:39,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-09-04 13:21:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:39,395 INFO L225 Difference]: With dead ends: 31 [2020-09-04 13:21:39,395 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 13:21:39,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:21:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 13:21:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-04 13:21:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:21:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:21:39,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-04 13:21:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:39,404 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:21:39,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:21:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:21:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:21:39,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:39,405 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 13:21:39,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:39,619 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:39,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-04 13:21:39,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:39,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820382614] [2020-09-04 13:21:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,831 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 13:21:39,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820382614] [2020-09-04 13:21:39,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899417008] [2020-09-04 13:21:39,832 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 13:21:39,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:39,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:21:39,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:39,934 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 13:21:39,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:39,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-09-04 13:21:39,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753660106] [2020-09-04 13:21:39,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:21:39,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:39,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:21:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:21:39,937 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-09-04 13:21:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:40,022 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-04 13:21:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:21:40,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-04 13:21:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:40,025 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:21:40,025 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:21:40,026 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 13:21:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:21:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:21:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:21:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 13:21:40,033 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-04 13:21:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:40,034 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 13:21:40,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:21:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 13:21:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:21:40,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:40,036 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 13:21:40,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:40,253 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-04 13:21:40,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:40,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512209038] [2020-09-04 13:21:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,491 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 13:21:40,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512209038] [2020-09-04 13:21:40,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491751624] [2020-09-04 13:21:40,493 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 13:21:40,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-04 13:21:40,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:21:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:40,740 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 13:21:40,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:40,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2020-09-04 13:21:40,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019320912] [2020-09-04 13:21:40,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 13:21:40,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 13:21:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:21:40,743 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2020-09-04 13:21:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:41,014 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-04 13:21:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:21:41,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-09-04 13:21:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:41,017 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:21:41,017 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:21:41,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 13:21:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:21:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 13:21:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:21:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 13:21:41,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-04 13:21:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:41,026 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 13:21:41,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 13:21:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 13:21:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:21:41,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:41,028 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 13:21:41,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:21:41,239 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:41,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-04 13:21:41,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:41,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980796399] [2020-09-04 13:21:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,469 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 13:21:41,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980796399] [2020-09-04 13:21:41,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847586526] [2020-09-04 13:21:41,471 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 13:21:41,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:21:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:21:41,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:41,595 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 13:21:41,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:41,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-09-04 13:21:41,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472161667] [2020-09-04 13:21:41,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:21:41,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:41,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:21:41,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:21:41,598 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-09-04 13:21:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:41,716 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-04 13:21:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:21:41,716 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-04 13:21:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:41,718 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:21:41,718 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:21:41,719 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 13:21:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:21:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 13:21:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:21:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 13:21:41,726 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-04 13:21:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:41,727 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 13:21:41,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:21:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 13:21:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:21:41,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:41,728 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 13:21:41,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:41,943 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-09-04 13:21:41,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:41,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116557083] [2020-09-04 13:21:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,204 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 13:21:42,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116557083] [2020-09-04 13:21:42,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793832273] [2020-09-04 13:21:42,205 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 13:21:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:21:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:42,309 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 13:21:42,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:42,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-09-04 13:21:42,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474866420] [2020-09-04 13:21:42,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:21:42,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:42,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:21:42,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:42,312 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-09-04 13:21:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:42,482 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-04 13:21:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:21:42,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-04 13:21:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:42,484 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:21:42,484 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:21:42,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:21:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:21:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-04 13:21:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:21:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:21:42,495 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-04 13:21:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:42,496 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:21:42,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:21:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:21:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 13:21:42,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:42,498 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 13:21:42,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:42,714 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:42,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-09-04 13:21:42,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:42,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536446445] [2020-09-04 13:21:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,042 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 13:21:43,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536446445] [2020-09-04 13:21:43,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417681320] [2020-09-04 13:21:43,044 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 13:21:43,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:43,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-04 13:21:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:43,159 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 13:21:43,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:43,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-09-04 13:21:43,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991490419] [2020-09-04 13:21:43,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:21:43,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:21:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:21:43,163 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-09-04 13:21:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:43,300 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 13:21:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:21:43,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-04 13:21:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:43,303 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:21:43,303 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:21:43,304 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 13:21:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:21:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 13:21:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:21:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 13:21:43,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-04 13:21:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:43,312 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 13:21:43,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:21:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 13:21:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:21:43,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:43,313 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 13:21:43,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:21:43,530 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-09-04 13:21:43,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:43,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392301930] [2020-09-04 13:21:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:43,907 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 13:21:43,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392301930] [2020-09-04 13:21:43,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113730132] [2020-09-04 13:21:43,908 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 13:21:43,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:21:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-04 13:21:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:44,438 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 13:21:44,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:44,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-09-04 13:21:44,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984879377] [2020-09-04 13:21:44,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 13:21:44,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:44,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 13:21:44,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 13:21:44,444 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2020-09-04 13:21:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:44,934 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-04 13:21:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 13:21:44,934 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2020-09-04 13:21:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:44,936 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:21:44,936 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:21:44,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 13:21:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:21:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 13:21:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:21:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 13:21:44,944 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-04 13:21:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:44,945 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 13:21:44,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 13:21:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 13:21:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:21:44,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:44,947 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 13:21:45,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:45,161 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-09-04 13:21:45,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:45,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829875200] [2020-09-04 13:21:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:45,521 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 13:21:45,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829875200] [2020-09-04 13:21:45,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088313337] [2020-09-04 13:21:45,522 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 13:21:45,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:45,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-04 13:21:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:45,654 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 13:21:45,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:45,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-09-04 13:21:45,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265795725] [2020-09-04 13:21:45,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:21:45,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:21:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:21:45,658 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-09-04 13:21:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:45,846 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-09-04 13:21:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:21:45,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 13:21:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:45,848 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:21:45,849 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:21:45,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:21:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:21:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-04 13:21:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:21:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-09-04 13:21:45,858 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-09-04 13:21:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:45,858 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-09-04 13:21:45,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:21:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-09-04 13:21:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:21:45,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:45,860 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 13:21:46,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:46,074 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-09-04 13:21:46,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:46,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194498598] [2020-09-04 13:21:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:46,504 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 13:21:46,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194498598] [2020-09-04 13:21:46,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018809085] [2020-09-04 13:21:46,505 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 13:21:46,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-04 13:21:46,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-04 13:21:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:46,624 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 13:21:46,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:46,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-09-04 13:21:46,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444405297] [2020-09-04 13:21:46,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:21:46,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:21:46,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:21:46,627 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-09-04 13:21:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:46,801 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-04 13:21:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:21:46,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-09-04 13:21:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:46,803 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:21:46,803 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 13:21:46,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:21:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 13:21:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-04 13:21:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:21:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-04 13:21:46,819 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-09-04 13:21:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:46,820 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-04 13:21:46,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:21:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-04 13:21:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 13:21:46,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:46,821 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 13:21:47,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-04 13:21:47,022 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:47,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-09-04 13:21:47,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:47,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245297491] [2020-09-04 13:21:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,166 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 13:21:47,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:47,571 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 13:21:47,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245297491] [2020-09-04 13:21:47,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399947129] [2020-09-04 13:21:47,572 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 13:21:47,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-04 13:21:47,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:47,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-04 13:21:47,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:48,356 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 13:21:48,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:48,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2020-09-04 13:21:48,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687569755] [2020-09-04 13:21:48,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 13:21:48,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 13:21:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 13:21:48,359 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 44 states. [2020-09-04 13:21:49,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:49,176 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-09-04 13:21:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 13:21:49,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 85 [2020-09-04 13:21:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:49,179 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:21:49,179 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:21:49,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 13:21:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:21:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-04 13:21:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:21:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 13:21:49,188 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-09-04 13:21:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:49,189 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 13:21:49,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 13:21:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 13:21:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 13:21:49,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:49,190 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 13:21:49,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:21:49,405 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-09-04 13:21:49,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:49,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912158459] [2020-09-04 13:21:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:49,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,065 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 13:21:50,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912158459] [2020-09-04 13:21:50,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452398276] [2020-09-04 13:21:50,071 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 13:21:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-04 13:21:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:50,235 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 13:21:50,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:50,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-09-04 13:21:50,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485929363] [2020-09-04 13:21:50,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 13:21:50,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 13:21:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:21:50,240 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-09-04 13:21:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:50,448 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-09-04 13:21:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:21:50,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-09-04 13:21:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:50,450 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:21:50,450 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:21:50,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 13:21:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:21:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-04 13:21:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:21:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-04 13:21:50,457 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-09-04 13:21:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:50,457 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-04 13:21:50,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 13:21:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-04 13:21:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 13:21:50,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:50,459 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 13:21:50,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:21:50,669 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-09-04 13:21:50,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:50,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432093837] [2020-09-04 13:21:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:50,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:51,398 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 13:21:51,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432093837] [2020-09-04 13:21:51,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866273023] [2020-09-04 13:21:51,399 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 13:21:51,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:51,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-04 13:21:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:51,557 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 13:21:51,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:51,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-04 13:21:51,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875903794] [2020-09-04 13:21:51,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 13:21:51,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 13:21:51,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:21:51,560 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-09-04 13:21:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:51,804 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-04 13:21:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:21:51,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-09-04 13:21:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:51,806 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:21:51,806 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:21:51,808 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 13:21:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:21:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-04 13:21:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 13:21:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 13:21:51,821 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-09-04 13:21:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:51,821 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 13:21:51,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 13:21:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 13:21:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 13:21:51,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:51,827 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 13:21:52,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:52,042 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-09-04 13:21:52,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:52,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993326005] [2020-09-04 13:21:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:52,708 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 13:21:52,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993326005] [2020-09-04 13:21:52,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337338412] [2020-09-04 13:21:52,709 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 13:21:52,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-04 13:21:52,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-04 13:21:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:52,888 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 13:21:52,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:52,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-09-04 13:21:52,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956942021] [2020-09-04 13:21:52,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 13:21:52,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:52,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 13:21:52,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:21:52,891 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-09-04 13:21:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:53,167 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-09-04 13:21:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:21:53,168 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-09-04 13:21:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:53,169 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:21:53,169 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:21:53,171 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 13:21:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:21:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-04 13:21:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 13:21:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-04 13:21:53,176 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-09-04 13:21:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:53,176 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-04 13:21:53,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 13:21:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-04 13:21:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 13:21:53,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:53,178 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 13:21:53,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-04 13:21:53,392 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-09-04 13:21:53,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:53,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255083436] [2020-09-04 13:21:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:53,459 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 13:21:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:53,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,172 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 13:21:54,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255083436] [2020-09-04 13:21:54,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686931534] [2020-09-04 13:21:54,173 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 13:21:54,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-04 13:21:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:54,324 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 13:21:54,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:54,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-09-04 13:21:54,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661276166] [2020-09-04 13:21:54,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 13:21:54,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 13:21:54,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:21:54,334 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-09-04 13:21:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:54,622 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-09-04 13:21:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 13:21:54,623 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-09-04 13:21:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:54,625 INFO L225 Difference]: With dead ends: 70 [2020-09-04 13:21:54,625 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:21:54,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 13:21:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:21:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 13:21:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 13:21:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-09-04 13:21:54,653 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-09-04 13:21:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:54,654 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-09-04 13:21:54,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 13:21:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-09-04 13:21:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-04 13:21:54,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:54,656 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 13:21:54,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-04 13:21:54,870 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-09-04 13:21:54,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:54,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167458480] [2020-09-04 13:21:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:54,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:55,825 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 13:21:55,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167458480] [2020-09-04 13:21:55,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381098113] [2020-09-04 13:21:55,826 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 13:21:55,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-04 13:21:55,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2020-09-04 13:21:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:57,265 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 13:21:57,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:57,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2020-09-04 13:21:57,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660354262] [2020-09-04 13:21:57,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-09-04 13:21:57,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-09-04 13:21:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 13:21:57,270 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2020-09-04 13:21:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:58,643 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-04 13:21:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 13:21:58,644 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2020-09-04 13:21:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:58,645 INFO L225 Difference]: With dead ends: 73 [2020-09-04 13:21:58,646 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 13:21:58,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2020-09-04 13:21:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 13:21:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-04 13:21:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 13:21:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-04 13:21:58,663 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-09-04 13:21:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:58,664 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-04 13:21:58,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-09-04 13:21:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-04 13:21:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 13:21:58,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:58,667 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 13:21:58,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-04 13:21:58,872 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-09-04 13:21:58,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:58,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921117290] [2020-09-04 13:21:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:58,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,231 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 2 [2020-09-04 13:21:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,778 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 13:21:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:59,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:00,067 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 13:22:00,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921117290] [2020-09-04 13:22:00,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750493871] [2020-09-04 13:22:00,068 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 13:22:00,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-09-04 13:22:00,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 40 conjunts are in the unsatisfiable core [2020-09-04 13:22:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:01,582 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 13:22:01,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:01,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2020-09-04 13:22:01,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886543989] [2020-09-04 13:22:01,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 13:22:01,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:01,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 13:22:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 13:22:01,586 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2020-09-04 13:22:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:03,190 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-09-04 13:22:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 13:22:03,191 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2020-09-04 13:22:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:03,192 INFO L225 Difference]: With dead ends: 76 [2020-09-04 13:22:03,192 INFO L226 Difference]: Without dead ends: 72 [2020-09-04 13:22:03,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 13:22:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-04 13:22:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-09-04 13:22:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 13:22:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-04 13:22:03,206 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-09-04 13:22:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:03,206 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-04 13:22:03,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 13:22:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-04 13:22:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-04 13:22:03,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:03,207 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 13:22:03,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:03,416 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-09-04 13:22:03,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:03,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233361005] [2020-09-04 13:22:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:03,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,598 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 13:22:04,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233361005] [2020-09-04 13:22:04,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689687357] [2020-09-04 13:22:04,599 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 13:22:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2020-09-04 13:22:04,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:04,802 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 13:22:04,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:04,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-09-04 13:22:04,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084802692] [2020-09-04 13:22:04,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 13:22:04,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:04,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 13:22:04,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:22:04,809 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-09-04 13:22:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:05,233 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-09-04 13:22:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:22:05,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-09-04 13:22:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:05,237 INFO L225 Difference]: With dead ends: 79 [2020-09-04 13:22:05,238 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 13:22:05,244 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 13:22:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 13:22:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-09-04 13:22:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-04 13:22:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-09-04 13:22:05,253 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-09-04 13:22:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:05,255 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-09-04 13:22:05,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 13:22:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-09-04 13:22:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-04 13:22:05,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:05,257 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 13:22:05,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:05,471 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-09-04 13:22:05,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:05,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809865397] [2020-09-04 13:22:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:22:05,516 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:22:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:22:05,546 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:22:05,580 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:22:05,580 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:22:05,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 13:22:05,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:22:05 BoogieIcfgContainer [2020-09-04 13:22:05,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:22:05,702 INFO L168 Benchmark]: Toolchain (without parser) took 29486.33 ms. Allocated memory was 139.5 MB in the beginning and 503.3 MB in the end (delta: 363.9 MB). Free memory was 102.2 MB in the beginning and 230.2 MB in the end (delta: -128.0 MB). Peak memory consumption was 235.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:05,702 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:22:05,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.38 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:05,714 INFO L168 Benchmark]: Boogie Preprocessor took 30.96 ms. Allocated memory is still 139.5 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:05,714 INFO L168 Benchmark]: RCFGBuilder took 349.01 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.2 MB in the beginning and 171.5 MB in the end (delta: -80.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:05,715 INFO L168 Benchmark]: TraceAbstraction took 28807.14 ms. Allocated memory was 202.9 MB in the beginning and 503.3 MB in the end (delta: 300.4 MB). Free memory was 170.9 MB in the beginning and 230.2 MB in the end (delta: -59.3 MB). Peak memory consumption was 241.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:05,717 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.38 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.96 ms. Allocated memory is still 139.5 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.01 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.2 MB in the beginning and 171.5 MB in the end (delta: -80.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28807.14 ms. Allocated memory was 202.9 MB in the beginning and 503.3 MB in the end (delta: 300.4 MB). Free memory was 170.9 MB in the beginning and 230.2 MB in the end (delta: -59.3 MB). Peak memory consumption was 241.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; VAL [input=20] [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=20, input=20] [L11] int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.6s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 693 SDslu, 1928 SDs, 0 SdLazy, 1268 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2372 GetRequests, 1676 SyntacticMatches, 0 SemanticMatches, 696 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7454 ImplicationChecksByTransitivity, 12.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 578160 SizeOfPredicates, 158 NumberOfNonLiveVariables, 3268 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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 incorrect! Received shutdown request...