/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:17:43,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:17:43,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:17:43,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:17:43,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:17:43,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:17:43,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:17:43,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:17:43,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:17:43,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:17:43,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:17:43,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:17:43,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:17:43,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:17:43,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:17:43,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:17:43,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:17:43,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:17:43,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:17:43,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:17:43,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:17:43,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:17:43,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:17:43,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:17:43,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:17:43,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:17:43,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:17:43,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:17:43,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:17:43,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 23:17:43,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 23:17:43,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 23:17:43,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 23:17:43,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 23:17:43,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 23:17:43,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 23:17:43,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 23:17:43,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 23:17:43,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:17:43,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:17:43,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:17:43,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:17:43,846 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:17:43,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:17:43,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:17:43,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:17:43,848 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:17:43,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:17:43,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:17:43,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:17:43,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:17:43,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:17:43,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:17:43,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:17:43,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:17:43,849 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:17:43,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:17:43,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:17:43,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:17:43,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:17:43,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:17:43,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:17:43,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:17:43,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:43,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:17:43,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:17:43,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:17:43,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:17:43,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:17:43,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:17:43,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:17:43,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:17:44,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:17:44,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:17:44,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:17:44,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:17:44,252 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:17:44,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-19 23:17:44,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5588343/bc280b9dad2d44adbe57f61829336c8a/FLAGf5ade14d3 [2020-07-19 23:17:44,805 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:17:44,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-19 23:17:44,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5588343/bc280b9dad2d44adbe57f61829336c8a/FLAGf5ade14d3 [2020-07-19 23:17:45,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5588343/bc280b9dad2d44adbe57f61829336c8a [2020-07-19 23:17:45,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:17:45,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:17:45,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:45,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:17:45,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:17:45,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654517d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45, skipping insertion in model container [2020-07-19 23:17:45,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:17:45,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:17:45,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:45,399 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:17:45,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:45,425 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:17:45,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45 WrapperNode [2020-07-19 23:17:45,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:45,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:17:45,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:17:45,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:17:45,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:17:45,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:17:45,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:17:45,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:17:45,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:45,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:17:45,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:17:45,625 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-19 23:17:45,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:17:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:17:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-19 23:17:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:17:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:17:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:17:45,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:17:45,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:17:45,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:45 BoogieIcfgContainer [2020-07-19 23:17:45,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:17:45,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:17:45,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:17:45,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:17:45,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:17:45" (1/3) ... [2020-07-19 23:17:45,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13713fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:45, skipping insertion in model container [2020-07-19 23:17:45,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (2/3) ... [2020-07-19 23:17:45,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13713fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:45, skipping insertion in model container [2020-07-19 23:17:45,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:45" (3/3) ... [2020-07-19 23:17:45,844 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-07-19 23:17:45,854 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:17:45,861 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:17:45,875 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:17:45,899 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:17:45,899 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:17:45,900 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:17:45,900 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:17:45,900 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:17:45,900 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:17:45,900 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:17:45,901 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:17:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 23:17:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:17:45,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:45,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:45,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-19 23:17:45,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:45,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659442238] [2020-07-19 23:17:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:17:46,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659442238] [2020-07-19 23:17:46,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:17:46,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:17:46,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871225154] [2020-07-19 23:17:46,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:17:46,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:17:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:17:46,261 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-19 23:17:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:46,501 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-19 23:17:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:17:46,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:17:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:46,520 INFO L225 Difference]: With dead ends: 30 [2020-07-19 23:17:46,520 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:17:46,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:17:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:17:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 23:17:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 23:17:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 23:17:46,586 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 23:17:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:46,587 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 23:17:46,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:17:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 23:17:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 23:17:46,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:46,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:46,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:17:46,596 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:46,597 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-19 23:17:46,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:46,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984835405] [2020-07-19 23:17:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:46,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984835405] [2020-07-19 23:17:46,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950036526] [2020-07-19 23:17:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68fc0aaf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:46,787 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68fc0aaf issued 2 check-sat command(s) [2020-07-19 23:17:46,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:46,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:17:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:46,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:46,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-19 23:17:46,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803334043] [2020-07-19 23:17:46,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:17:46,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:46,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:17:46,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:17:46,856 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-19 23:17:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:46,913 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-19 23:17:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:17:46,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-19 23:17:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:46,915 INFO L225 Difference]: With dead ends: 25 [2020-07-19 23:17:46,915 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:17:46,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:17:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:17:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:17:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:17:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 23:17:46,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-19 23:17:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:46,924 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 23:17:46,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:17:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 23:17:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 23:17:46,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:46,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:47,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:17:47,140 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:47,141 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-19 23:17:47,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:47,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409702146] [2020-07-19 23:17:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:47,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409702146] [2020-07-19 23:17:47,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849210672] [2020-07-19 23:17:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d72b0a8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:47,330 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d72b0a8 issued 2 check-sat command(s) [2020-07-19 23:17:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:17:47,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:47,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:47,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-19 23:17:47,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009623934] [2020-07-19 23:17:47,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:17:47,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:47,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:17:47,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:17:47,379 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-19 23:17:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:47,465 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-19 23:17:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:17:47,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-19 23:17:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:47,467 INFO L225 Difference]: With dead ends: 28 [2020-07-19 23:17:47,467 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:17:47,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:17:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 23:17:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 23:17:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-19 23:17:47,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-19 23:17:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:47,475 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-19 23:17:47,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:17:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-19 23:17:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:17:47,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:47,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:47,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:47,691 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:47,692 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-19 23:17:47,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:47,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426849689] [2020-07-19 23:17:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:47,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426849689] [2020-07-19 23:17:47,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693356811] [2020-07-19 23:17:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30e22706 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:47,877 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30e22706 issued 2 check-sat command(s) [2020-07-19 23:17:47,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:17:47,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:47,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:47,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-19 23:17:47,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754851219] [2020-07-19 23:17:47,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:17:47,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:47,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:17:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:17:47,909 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-19 23:17:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:48,002 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-19 23:17:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:17:48,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-19 23:17:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:48,004 INFO L225 Difference]: With dead ends: 31 [2020-07-19 23:17:48,004 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 23:17:48,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:17:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 23:17:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 23:17:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:17:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 23:17:48,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-19 23:17:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:48,018 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 23:17:48,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:17:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 23:17:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 23:17:48,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:48,021 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:48,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:48,238 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:48,239 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-19 23:17:48,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:48,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014637671] [2020-07-19 23:17:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:48,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014637671] [2020-07-19 23:17:48,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871216890] [2020-07-19 23:17:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78c17422 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:48,530 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78c17422 issued 2 check-sat command(s) [2020-07-19 23:17:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:17:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:48,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:48,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-19 23:17:48,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956531568] [2020-07-19 23:17:48,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:17:48,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:17:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:17:48,568 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-19 23:17:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:48,669 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-19 23:17:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:17:48,670 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-19 23:17:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:48,671 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:17:48,672 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:17:48,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:17:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:17:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 23:17:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:17:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-19 23:17:48,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-19 23:17:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:48,680 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-19 23:17:48,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:17:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-19 23:17:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 23:17:48,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:48,682 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:48,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:48,898 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:48,899 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-19 23:17:48,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:48,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887301579] [2020-07-19 23:17:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:49,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887301579] [2020-07-19 23:17:49,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507295187] [2020-07-19 23:17:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d089e19 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:49,123 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d089e19 issued 2 check-sat command(s) [2020-07-19 23:17:49,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:49,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:17:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:49,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:49,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-19 23:17:49,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376419809] [2020-07-19 23:17:49,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:17:49,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:49,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:17:49,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:49,167 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-19 23:17:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:49,273 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-19 23:17:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:17:49,273 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-19 23:17:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:49,275 INFO L225 Difference]: With dead ends: 37 [2020-07-19 23:17:49,275 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 23:17:49,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:17:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 23:17:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 23:17:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:17:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 23:17:49,282 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-19 23:17:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:49,283 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 23:17:49,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:17:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 23:17:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 23:17:49,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:49,285 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:49,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:17:49,500 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-19 23:17:49,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:49,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089462506] [2020-07-19 23:17:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:49,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089462506] [2020-07-19 23:17:49,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002105589] [2020-07-19 23:17:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e67d3f3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:49,783 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e67d3f3 issued 2 check-sat command(s) [2020-07-19 23:17:49,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:17:49,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:49,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:49,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-19 23:17:49,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803763367] [2020-07-19 23:17:49,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:17:49,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:17:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:17:49,818 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-19 23:17:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:49,931 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-19 23:17:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:17:49,931 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-19 23:17:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:49,933 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:17:49,933 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:17:49,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:17:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:17:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 23:17:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 23:17:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 23:17:49,940 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-19 23:17:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:49,941 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 23:17:49,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:17:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 23:17:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 23:17:49,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:49,942 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:50,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,156 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-19 23:17:50,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:50,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965733425] [2020-07-19 23:17:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:50,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965733425] [2020-07-19 23:17:50,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726709881] [2020-07-19 23:17:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f223792 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,452 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f223792 issued 2 check-sat command(s) [2020-07-19 23:17:50,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:50,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:17:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:50,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:50,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-19 23:17:50,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129233870] [2020-07-19 23:17:50,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:17:50,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:17:50,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:17:50,518 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-19 23:17:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:50,646 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-19 23:17:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:17:50,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-19 23:17:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:50,648 INFO L225 Difference]: With dead ends: 43 [2020-07-19 23:17:50,648 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:17:50,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:17:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:17:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 23:17:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 23:17:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 23:17:50,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-19 23:17:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:50,656 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 23:17:50,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:17:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 23:17:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 23:17:50,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:50,657 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:50,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,871 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:50,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-19 23:17:50,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:50,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926794111] [2020-07-19 23:17:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:51,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926794111] [2020-07-19 23:17:51,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498850598] [2020-07-19 23:17:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f6bc35d No working directory specified, using /storage/repos/ultimate/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 [2020-07-19 23:17:51,196 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f6bc35d issued 2 check-sat command(s) [2020-07-19 23:17:51,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:17:51,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:51,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:51,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-19 23:17:51,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740391265] [2020-07-19 23:17:51,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:17:51,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:17:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:17:51,241 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-19 23:17:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:51,374 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-19 23:17:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:17:51,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-19 23:17:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:51,376 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:17:51,376 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:17:51,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:17:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:17:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 23:17:51,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:17:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-19 23:17:51,383 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-19 23:17:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:51,384 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-19 23:17:51,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:17:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-19 23:17:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 23:17:51,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:51,385 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:51,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:17:51,601 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:51,602 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-19 23:17:51,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:51,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143769322] [2020-07-19 23:17:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:51,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143769322] [2020-07-19 23:17:51,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237870891] [2020-07-19 23:17:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@735bfbb7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:51,988 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@735bfbb7 issued 2 check-sat command(s) [2020-07-19 23:17:51,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:51,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:17:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:52,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:52,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-19 23:17:52,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678273464] [2020-07-19 23:17:52,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:17:52,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:17:52,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:17:52,060 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-19 23:17:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:52,203 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-19 23:17:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:17:52,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-19 23:17:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:52,205 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:17:52,205 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 23:17:52,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:17:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 23:17:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 23:17:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:17:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 23:17:52,219 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-19 23:17:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:52,219 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 23:17:52,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:17:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 23:17:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 23:17:52,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:52,221 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:52,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:52,424 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-19 23:17:52,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:52,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721880320] [2020-07-19 23:17:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:52,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721880320] [2020-07-19 23:17:52,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997674324] [2020-07-19 23:17:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1bf2c536 No working directory specified, using /storage/repos/ultimate/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 [2020-07-19 23:17:52,846 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1bf2c536 issued 2 check-sat command(s) [2020-07-19 23:17:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:17:52,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:52,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:52,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-19 23:17:52,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766709667] [2020-07-19 23:17:52,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:17:52,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:17:52,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:17:52,903 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-19 23:17:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:53,061 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-19 23:17:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:17:53,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-19 23:17:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:53,063 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:17:53,063 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:17:53,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:17:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:17:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 23:17:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:17:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-19 23:17:53,070 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-19 23:17:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:53,071 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-19 23:17:53,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:17:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-19 23:17:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 23:17:53,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:53,072 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:53,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,274 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:53,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-19 23:17:53,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:53,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856445344] [2020-07-19 23:17:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:53,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856445344] [2020-07-19 23:17:53,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259605913] [2020-07-19 23:17:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23397a2d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,835 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23397a2d issued 2 check-sat command(s) [2020-07-19 23:17:53,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:17:53,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:53,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:53,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-19 23:17:53,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997140680] [2020-07-19 23:17:53,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:17:53,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:53,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:17:53,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:17:53,878 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-19 23:17:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:54,054 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-19 23:17:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:17:54,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-19 23:17:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:54,056 INFO L225 Difference]: With dead ends: 55 [2020-07-19 23:17:54,056 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 23:17:54,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:17:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 23:17:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 23:17:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:17:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 23:17:54,065 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-19 23:17:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:54,066 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 23:17:54,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:17:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 23:17:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 23:17:54,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:54,068 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:54,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 23:17:54,281 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-19 23:17:54,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:54,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507549510] [2020-07-19 23:17:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:54,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507549510] [2020-07-19 23:17:54,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731520407] [2020-07-19 23:17:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9cfb9ff No working directory specified, using /storage/repos/ultimate/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 [2020-07-19 23:17:54,834 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9cfb9ff issued 2 check-sat command(s) [2020-07-19 23:17:54,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:17:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:54,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:54,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-19 23:17:54,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311535856] [2020-07-19 23:17:54,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:17:54,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:17:54,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:17:54,894 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-19 23:17:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:55,112 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-19 23:17:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:17:55,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-19 23:17:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:55,114 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:17:55,114 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:17:55,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:17:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:17:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-19 23:17:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 23:17:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-19 23:17:55,122 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-19 23:17:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:55,122 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-19 23:17:55,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:17:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-19 23:17:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 23:17:55,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:55,124 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:55,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:17:55,339 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-19 23:17:55,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:55,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516183948] [2020-07-19 23:17:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:55,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516183948] [2020-07-19 23:17:55,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144106389] [2020-07-19 23:17:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7997184e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:55,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7997184e issued 2 check-sat command(s) [2020-07-19 23:17:55,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:17:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:55,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:55,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-19 23:17:55,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234917609] [2020-07-19 23:17:55,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:17:55,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:17:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:17:55,960 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-19 23:17:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:56,138 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-19 23:17:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:17:56,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-19 23:17:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:56,140 INFO L225 Difference]: With dead ends: 61 [2020-07-19 23:17:56,140 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 23:17:56,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:17:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 23:17:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 23:17:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:17:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 23:17:56,152 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-19 23:17:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:56,153 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 23:17:56,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:17:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 23:17:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 23:17:56,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:56,158 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:56,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:17:56,375 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-19 23:17:56,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:56,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516516716] [2020-07-19 23:17:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:17:56,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516516716] [2020-07-19 23:17:56,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406416114] [2020-07-19 23:17:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@598efd92 No working directory specified, using /storage/repos/ultimate/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 [2020-07-19 23:17:57,002 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@598efd92 issued 2 check-sat command(s) [2020-07-19 23:17:57,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:57,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:17:57,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:17:57,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:57,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-19 23:17:57,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629611807] [2020-07-19 23:17:57,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:17:57,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:57,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:17:57,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:17:57,102 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-19 23:17:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:57,399 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-19 23:17:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:17:57,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-19 23:17:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:57,401 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:17:57,401 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:17:57,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:17:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:17:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-19 23:17:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 23:17:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-19 23:17:57,415 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-19 23:17:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:57,416 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-19 23:17:57,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:17:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-19 23:17:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-19 23:17:57,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:57,418 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:57,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:57,632 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-19 23:17:57,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:57,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922781098] [2020-07-19 23:17:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@245644c4 [2020-07-19 23:17:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-07-19 23:17:59,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922781098] [2020-07-19 23:17:59,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256436271] [2020-07-19 23:17:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d690ed5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:59,489 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d690ed5 issued 4 check-sat command(s) [2020-07-19 23:17:59,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:59,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 165 conjunts are in the unsatisfiable core [2020-07-19 23:17:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 23:18:01,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:01,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2020-07-19 23:18:01,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123590074] [2020-07-19 23:18:01,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-19 23:18:01,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:01,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-19 23:18:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=4527, Unknown=0, NotChecked=0, Total=5112 [2020-07-19 23:18:01,362 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 72 states. [2020-07-19 23:18:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:04,362 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-07-19 23:18:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-19 23:18:04,362 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 103 [2020-07-19 23:18:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:04,363 INFO L225 Difference]: With dead ends: 63 [2020-07-19 23:18:04,364 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:18:04,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1283, Invalid=9847, Unknown=0, NotChecked=0, Total=11130 [2020-07-19 23:18:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:18:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:18:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:18:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:18:04,370 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-07-19 23:18:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:04,371 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:18:04,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-19 23:18:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:18:04,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:18:04,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 23:18:04,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:18:04,615 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 23:18:04,616 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:18:04,616 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:18:04,616 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:18:04,616 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:18:04,616 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:18:04,616 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-19 23:18:04,617 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-19 23:18:04,618 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-19 23:18:04,618 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-19 23:18:04,618 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-19 23:18:04,618 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-19 23:18:04,619 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-19 23:18:04,619 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-19 23:18:04,619 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-19 23:18:04,619 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-19 23:18:04,619 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-19 23:18:04,619 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 15 main_~a~0) (<= main_~a~0 15)) [2020-07-19 23:18:04,620 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-19 23:18:04,620 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-19 23:18:04,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:18:04 BoogieIcfgContainer [2020-07-19 23:18:04,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:18:04,638 INFO L168 Benchmark]: Toolchain (without parser) took 19441.52 ms. Allocated memory was 148.9 MB in the beginning and 389.0 MB in the end (delta: 240.1 MB). Free memory was 107.0 MB in the beginning and 155.5 MB in the end (delta: -48.5 MB). Peak memory consumption was 191.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:04,641 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 148.9 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:18:04,642 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.85 ms. Allocated memory is still 148.9 MB. Free memory was 106.6 MB in the beginning and 97.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:04,642 INFO L168 Benchmark]: Boogie Preprocessor took 26.83 ms. Allocated memory is still 148.9 MB. Free memory was 97.0 MB in the beginning and 95.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:04,643 INFO L168 Benchmark]: RCFGBuilder took 381.23 ms. Allocated memory was 148.9 MB in the beginning and 202.9 MB in the end (delta: 54.0 MB). Free memory was 95.6 MB in the beginning and 171.0 MB in the end (delta: -75.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:04,646 INFO L168 Benchmark]: TraceAbstraction took 18791.73 ms. Allocated memory was 202.9 MB in the beginning and 389.0 MB in the end (delta: 186.1 MB). Free memory was 171.0 MB in the beginning and 155.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 201.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:04,650 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 148.9 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.85 ms. Allocated memory is still 148.9 MB. Free memory was 106.6 MB in the beginning and 97.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.83 ms. Allocated memory is still 148.9 MB. Free memory was 97.0 MB in the beginning and 95.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 381.23 ms. Allocated memory was 148.9 MB in the beginning and 202.9 MB in the end (delta: 54.0 MB). Free memory was 95.6 MB in the beginning and 171.0 MB in the end (delta: -75.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18791.73 ms. Allocated memory was 202.9 MB in the beginning and 389.0 MB in the end (delta: 186.1 MB). Free memory was 171.0 MB in the beginning and 155.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 201.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.6s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 508 SDslu, 1284 SDs, 0 SdLazy, 1491 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1560 GetRequests, 1172 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1843 NumberOfCodeBlocks, 1451 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1812 ConstructedInterpolants, 0 QuantifiedInterpolants, 426582 SizeOfPredicates, 168 NumberOfNonLiveVariables, 2133 ConjunctsInSsa, 431 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...