/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:39:07,127 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:39:07,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:39:07,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:39:07,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:39:07,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:39:07,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:39:07,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:39:07,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:39:07,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:39:07,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:39:07,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:39:07,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:39:07,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:39:07,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:39:07,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:39:07,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:39:07,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:39:07,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:39:07,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:39:07,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:39:07,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:39:07,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:39:07,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:39:07,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:39:07,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:39:07,206 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 [2020-07-20 21:39:07,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:39:07,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:39:07,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:39:07,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:39:07,245 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:39:07,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:39:07,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:39:07,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:39:07,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:39:07,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:39:07,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:39:07,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:39:07,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:39:07,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:39:07,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:39:07,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:39:07,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:39:07,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:39:07,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:39:07,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:39:07,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:39:07,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:39:07,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:39:07,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:39:07,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:39:07,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:39:07,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:07,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:39:07,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:39:07,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 [2020-07-20 21:39:07,624 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:39:07,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:39:07,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:39:07,659 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:39:07,659 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:39:07,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-20 21:39:07,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64918673e/1dd4995940ec4e3a9e6b5aec9acf75c2/FLAG9d6dcce39 [2020-07-20 21:39:08,429 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:39:08,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-20 21:39:08,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64918673e/1dd4995940ec4e3a9e6b5aec9acf75c2/FLAG9d6dcce39 [2020-07-20 21:39:08,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64918673e/1dd4995940ec4e3a9e6b5aec9acf75c2 [2020-07-20 21:39:08,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:39:08,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:39:08,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:39:08,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:39:08,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:39:08,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:39:08" (1/1) ... [2020-07-20 21:39:08,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2290a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:08, skipping insertion in model container [2020-07-20 21:39:08,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:39:08" (1/1) ... [2020-07-20 21:39:08,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:39:08,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:39:09,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:39:09,074 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:39:09,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:39:09,123 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:39:09,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09 WrapperNode [2020-07-20 21:39:09,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:39:09,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:39:09,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:39:09,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:39:09,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (1/1) ... [2020-07-20 21:39:09,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (1/1) ... [2020-07-20 21:39:09,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (1/1) ... [2020-07-20 21:39:09,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (1/1) ... [2020-07-20 21:39:09,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (1/1) ... [2020-07-20 21:39:09,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (1/1) ... [2020-07-20 21:39:09,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (1/1) ... [2020-07-20 21:39:09,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:39:09,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:39:09,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:39:09,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:39:09,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (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 [2020-07-20 21:39:09,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:39:09,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:39:09,444 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 21:39:09,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:39:09,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 21:39:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:39:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 21:39:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:39:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:39:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:39:09,658 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:39:09,659 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:39:09,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:39:09 BoogieIcfgContainer [2020-07-20 21:39:09,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:39:09,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:39:09,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:39:09,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:39:09,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:39:08" (1/3) ... [2020-07-20 21:39:09,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e81f2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:39:09, skipping insertion in model container [2020-07-20 21:39:09,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:09" (2/3) ... [2020-07-20 21:39:09,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e81f2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:39:09, skipping insertion in model container [2020-07-20 21:39:09,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:39:09" (3/3) ... [2020-07-20 21:39:09,678 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-07-20 21:39:09,693 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:39:09,703 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:39:09,721 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:39:09,757 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:39:09,757 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:39:09,757 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:39:09,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:39:09,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:39:09,758 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:39:09,758 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:39:09,758 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:39:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 21:39:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:39:09,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:09,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:09,795 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:09,803 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 21:39:09,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:09,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296761975] [2020-07-20 21:39:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:09,908 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:39:09,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:39:10,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:39:10,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296761975] [2020-07-20 21:39:10,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:39:10,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:39:10,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015956635] [2020-07-20 21:39:10,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:39:10,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:39:10,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:39:10,181 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 21:39:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:10,262 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-20 21:39:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:39:10,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:39:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:10,278 INFO L225 Difference]: With dead ends: 32 [2020-07-20 21:39:10,278 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 21:39:10,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:39:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 21:39:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 21:39:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 21:39:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 21:39:10,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 21:39:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:10,338 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 21:39:10,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:39:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 21:39:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:39:10,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:10,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:10,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:10,552 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:10,554 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 21:39:10,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:10,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166478111] [2020-07-20 21:39:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:10,600 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:10,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:10,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 21:39:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 21:39:10,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 21:39:10,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166478111] [2020-07-20 21:39:10,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:10,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 21:39:10,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801011074] [2020-07-20 21:39:10,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:39:10,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:39:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:39:10,903 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-20 21:39:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:10,982 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-20 21:39:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:10,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-20 21:39:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:10,986 INFO L225 Difference]: With dead ends: 30 [2020-07-20 21:39:10,987 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 21:39:10,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:39:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 21:39:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 21:39:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 21:39:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 21:39:11,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-20 21:39:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:11,011 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 21:39:11,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:39:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 21:39:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 21:39:11,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:11,016 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:11,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:11,233 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:11,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-20 21:39:11,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:11,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844864646] [2020-07-20 21:39:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:11,274 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:11,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:39:11,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 21:39:11,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 21:39:12,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844864646] [2020-07-20 21:39:12,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:12,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-20 21:39:12,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095086972] [2020-07-20 21:39:12,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:39:12,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:39:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:39:12,168 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-20 21:39:14,639 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 21:39:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:14,742 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-20 21:39:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 21:39:14,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-20 21:39:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:14,749 INFO L225 Difference]: With dead ends: 42 [2020-07-20 21:39:14,749 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 21:39:14,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:39:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 21:39:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 21:39:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:39:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 21:39:14,762 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-20 21:39:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:14,762 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 21:39:14,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:39:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 21:39:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 21:39:14,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:14,765 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:14,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:14,982 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-20 21:39:14,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:14,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276423328] [2020-07-20 21:39:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:15,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:15,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 21:39:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 21:39:15,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 76 refuted. 1 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 21:39:19,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276423328] [2020-07-20 21:39:19,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:19,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-20 21:39:19,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124471047] [2020-07-20 21:39:19,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 21:39:19,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:19,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 21:39:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1075, Unknown=1, NotChecked=0, Total=1260 [2020-07-20 21:39:19,292 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-20 21:39:22,221 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 21:39:23,103 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-20 21:39:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:44,908 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-20 21:39:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 21:39:44,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-20 21:39:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:44,915 INFO L225 Difference]: With dead ends: 66 [2020-07-20 21:39:44,915 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 21:39:44,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=381, Invalid=1869, Unknown=6, NotChecked=0, Total=2256 [2020-07-20 21:39:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 21:39:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 21:39:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:39:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 21:39:44,932 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-20 21:39:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:44,933 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 21:39:44,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 21:39:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 21:39:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 21:39:44,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:44,938 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:45,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:45,153 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:45,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-20 21:39:45,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:45,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216983571] [2020-07-20 21:39:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:45,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:45,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:45,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 68 conjunts are in the unsatisfiable core [2020-07-20 21:39:45,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 21:39:46,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 21:39:52,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216983571] [2020-07-20 21:39:52,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:52,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-20 21:39:52,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785605175] [2020-07-20 21:39:52,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-20 21:39:52,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:52,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-20 21:39:52,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3940, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 21:39:52,939 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-20 21:40:16,897 WARN L193 SmtUtils]: Spent 18.29 s on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 21:40:44,947 WARN L193 SmtUtils]: Spent 22.92 s on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:41:05,616 WARN L193 SmtUtils]: Spent 13.21 s on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 21:41:21,960 WARN L193 SmtUtils]: Spent 12.74 s on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:41:33,385 WARN L193 SmtUtils]: Spent 5.63 s on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 21:41:42,165 WARN L193 SmtUtils]: Spent 5.40 s on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:50,317 WARN L193 SmtUtils]: Spent 4.84 s on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:42:01,143 WARN L193 SmtUtils]: Spent 5.98 s on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:42:10,152 WARN L193 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:42:19,975 WARN L193 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:42:23,171 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:42:31,295 WARN L193 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:42:33,873 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:42:37,568 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 21:42:39,880 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:42:42,012 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:42:43,690 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:42:45,041 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:42:48,056 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:42:51,185 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:42:54,753 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 21:42:55,696 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 21:42:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:57,415 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-20 21:42:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-20 21:42:57,417 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-20 21:42:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:57,421 INFO L225 Difference]: With dead ends: 114 [2020-07-20 21:42:57,422 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 21:42:57,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 186.2s TimeCoverageRelationStatistics Valid=1526, Invalid=7592, Unknown=2, NotChecked=0, Total=9120 [2020-07-20 21:42:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 21:42:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-20 21:42:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 21:42:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-20 21:42:57,448 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-20 21:42:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:57,449 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-20 21:42:57,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-20 21:42:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-20 21:42:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 21:42:57,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:57,458 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:57,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:57,664 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-20 21:42:57,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:57,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892596540] [2020-07-20 21:42:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:11,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:43:11,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-20 21:43:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-20 21:43:16,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:45:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1398 refuted. 59 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-20 21:45:53,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892596540] [2020-07-20 21:45:53,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:45:53,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-20 21:45:53,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121182012] [2020-07-20 21:45:53,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-20 21:45:53,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:45:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-20 21:45:53,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=14990, Unknown=54, NotChecked=0, Total=17292 [2020-07-20 21:45:53,944 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-20 21:47:01,420 WARN L193 SmtUtils]: Spent 4.57 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-20 21:48:04,075 WARN L193 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-20 21:49:05,949 WARN L193 SmtUtils]: Spent 3.58 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-20 21:50:11,702 WARN L193 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-20 21:51:15,874 WARN L193 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-20 21:52:04,818 WARN L193 SmtUtils]: Spent 5.08 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-20 21:52:58,042 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 143 DAG size of output: 13 [2020-07-20 21:53:00,077 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ |c_id_#res| 26) 4294967296) 200) (< (mod (+ |c_id_#res| 10) 4294967296) 200) (< (mod (+ |c_id_#res| 12) 4294967296) 200) (< (mod (+ |c_id_#res| 6) 4294967296) 200) (< (mod (+ |c_id_#res| 11) 4294967296) 200) (< (mod (+ |c_id_#res| 19) 4294967296) 200) (< (mod (+ |c_id_#res| 7) 4294967296) 200) (< (mod (+ |c_id_#res| 5) 4294967296) 200) (< (mod (+ |c_id_#res| 21) 4294967296) 200) (< (mod (+ |c_id_#res| 25) 4294967296) 200) (< (mod (+ |c_id_#res| 13) 4294967296) 200) (< (mod (+ |c_id_#res| 24) 4294967296) 200) (< (mod (+ |c_id_#res| 17) 4294967296) 200) (< (mod |c_id_#res| 4294967296) 200) (< (mod (+ |c_id_#res| 23) 4294967296) 200) (< (mod (+ |c_id_#res| 9) 4294967296) 200) (< (mod (+ |c_id_#res| 4) 4294967296) 200) (< (mod (+ |c_id_#res| 18) 4294967296) 200) (< (mod (+ |c_id_#res| 15) 4294967296) 200) (< (mod (+ |c_id_#res| 20) 4294967296) 200) (< (mod (+ |c_id_#res| 8) 4294967296) 200) (< (mod (+ |c_id_#res| 3) 4294967296) 200) (< (mod (+ |c_id_#res| 14) 4294967296) 200) (< (mod (+ |c_id_#res| 1) 4294967296) 200) (< (mod (+ |c_id_#res| 22) 4294967296) 200) (< (mod (+ |c_id_#res| 16) 4294967296) 200) (< (mod (+ |c_id_#res| 27) 4294967296) 200) (< (mod (+ |c_id_#res| 2) 4294967296) 200)) is different from false