/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 NUM_FUNCTIONS --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/loop-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:33:57,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:33:57,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:33:57,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:33:57,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:33:57,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:33:57,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:33:57,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:33:57,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:33:57,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:33:57,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:33:57,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:33:57,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:33:57,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:33:57,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:33:57,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:33:57,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:33:57,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:33:57,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:33:57,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:33:57,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:33:57,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:33:57,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:33:57,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:33:57,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:33:57,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:33:57,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:33:57,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:33:57,820 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 14:33:57,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:33:57,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:33:57,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:33:57,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:33:57,848 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:33:57,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:33:57,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:33:57,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:33:57,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:33:57,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:33:57,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:33:57,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:33:57,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:33:57,849 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:33:57,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:33:57,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:33:57,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:33:57,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:33:57,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:33:57,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:33:57,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:33:57,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:33:57,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:33:57,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:33:57,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:33:57,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:33:57,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:33:57,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:33:57,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:33:57,857 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 -> 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 [2020-07-20 14:33:58,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:33:58,186 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:33:58,190 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:33:58,192 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:33:58,192 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:33:58,193 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-20 14:33:58,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fac6a9feb/20385b79c7a3467cb10f1b568c74a424/FLAG0d9893935 [2020-07-20 14:33:58,730 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:33:58,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-20 14:33:58,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fac6a9feb/20385b79c7a3467cb10f1b568c74a424/FLAG0d9893935 [2020-07-20 14:33:59,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fac6a9feb/20385b79c7a3467cb10f1b568c74a424 [2020-07-20 14:33:59,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:33:59,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:33:59,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:33:59,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:33:59,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:33:59,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38342db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59, skipping insertion in model container [2020-07-20 14:33:59,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:33:59,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:33:59,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:33:59,430 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:33:59,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:33:59,468 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:33:59,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59 WrapperNode [2020-07-20 14:33:59,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:33:59,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:33:59,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:33:59,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:33:59,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (1/1) ... [2020-07-20 14:33:59,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:33:59,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:33:59,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:33:59,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:33:59,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (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 14:33:59,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:33:59,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:33:59,658 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:33:59,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:33:59,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:33:59,659 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:33:59,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:33:59,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:33:59,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:33:59,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:33:59,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:33:59,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:33:59,877 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:33:59,878 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 14:33:59,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:33:59 BoogieIcfgContainer [2020-07-20 14:33:59,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:33:59,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:33:59,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:33:59,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:33:59,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:33:59" (1/3) ... [2020-07-20 14:33:59,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1788a6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:33:59, skipping insertion in model container [2020-07-20 14:33:59,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:33:59" (2/3) ... [2020-07-20 14:33:59,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1788a6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:33:59, skipping insertion in model container [2020-07-20 14:33:59,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:33:59" (3/3) ... [2020-07-20 14:33:59,889 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2020-07-20 14:33:59,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:33:59,903 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:33:59,916 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:33:59,937 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:33:59,937 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:33:59,938 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:33:59,938 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:33:59,938 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:33:59,938 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:33:59,938 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:33:59,938 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:33:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-20 14:33:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:33:59,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:33:59,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:33:59,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:33:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:33:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1434042835, now seen corresponding path program 1 times [2020-07-20 14:33:59,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:33:59,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376852802] [2020-07-20 14:33:59,976 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 14:34:00,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:34:00,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:34:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:34:00,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:34:00,187 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:34:00,192 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:34:00,212 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 14:34:00,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:34:00,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376852802] [2020-07-20 14:34:00,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:34:00,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:34:00,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939880176] [2020-07-20 14:34:00,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:34:00,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:34:00,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:34:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:34:00,232 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-20 14:34:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:34:00,374 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-20 14:34:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:34:00,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 14:34:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:34:00,386 INFO L225 Difference]: With dead ends: 30 [2020-07-20 14:34:00,386 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 14:34:00,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:34:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 14:34:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 14:34:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 14:34:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 14:34:00,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 14:34:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:34:00,435 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 14:34:00,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:34:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 14:34:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 14:34:00,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:34:00,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:34:00,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:34:00,649 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:34:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:34:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594220, now seen corresponding path program 1 times [2020-07-20 14:34:00,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:34:00,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955085137] [2020-07-20 14:34:00,652 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 14:34:00,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:34:00,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:34:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 14:34:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:34:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:00,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:34:00,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:34:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:00,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955085137] [2020-07-20 14:34:00,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:34:00,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 14:34:00,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081317286] [2020-07-20 14:34:00,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 14:34:00,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:34:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 14:34:00,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:34:00,837 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2020-07-20 14:34:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:34:01,035 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-20 14:34:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:34:01,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-07-20 14:34:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:34:01,037 INFO L225 Difference]: With dead ends: 23 [2020-07-20 14:34:01,037 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 14:34:01,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-20 14:34:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 14:34:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 14:34:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 14:34:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 14:34:01,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-20 14:34:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:34:01,046 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 14:34:01,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 14:34:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 14:34:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 14:34:01,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:34:01,047 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:34:01,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:34:01,263 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:34:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:34:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2102853613, now seen corresponding path program 2 times [2020-07-20 14:34:01,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:34:01,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077853818] [2020-07-20 14:34:01,265 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 14:34:01,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:34:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:34:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 14:34:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:34:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:01,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:34:01,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:34:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:01,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077853818] [2020-07-20 14:34:01,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:34:01,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 14:34:01,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028229203] [2020-07-20 14:34:01,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 14:34:01,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:34:01,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 14:34:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-07-20 14:34:01,593 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2020-07-20 14:34:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:34:02,106 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 14:34:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 14:34:02,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-07-20 14:34:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:34:02,108 INFO L225 Difference]: With dead ends: 29 [2020-07-20 14:34:02,108 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 14:34:02,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-07-20 14:34:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 14:34:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 14:34:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 14:34:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 14:34:02,120 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-20 14:34:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:34:02,121 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 14:34:02,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 14:34:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 14:34:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 14:34:02,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:34:02,123 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:34:02,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:34:02,324 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:34:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:34:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash 906772109, now seen corresponding path program 3 times [2020-07-20 14:34:02,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:34:02,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333801391] [2020-07-20 14:34:02,326 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 14:34:02,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:34:02,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:34:02,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 14:34:02,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:34:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:02,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:34:02,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:34:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:03,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333801391] [2020-07-20 14:34:03,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:34:03,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-20 14:34:03,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148413078] [2020-07-20 14:34:03,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 14:34:03,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:34:03,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 14:34:03,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-07-20 14:34:03,068 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 27 states. [2020-07-20 14:34:03,709 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-20 14:34:04,027 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-20 14:34:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:34:04,790 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 14:34:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 14:34:04,791 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2020-07-20 14:34:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:34:04,792 INFO L225 Difference]: With dead ends: 41 [2020-07-20 14:34:04,792 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 14:34:04,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=550, Invalid=1172, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 14:34:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 14:34:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 14:34:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 14:34:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-20 14:34:04,803 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-20 14:34:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:34:04,803 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-20 14:34:04,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 14:34:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-20 14:34:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 14:34:04,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:34:04,805 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:34:05,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:34:05,020 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:34:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:34:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1007922227, now seen corresponding path program 4 times [2020-07-20 14:34:05,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:34:05,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300810712] [2020-07-20 14:34:05,022 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 14:34:05,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:34:05,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:34:05,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-20 14:34:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:34:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:05,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:34:05,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:34:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:07,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300810712] [2020-07-20 14:34:07,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:34:07,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2020-07-20 14:34:07,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864809291] [2020-07-20 14:34:07,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-20 14:34:07,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:34:07,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-20 14:34:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 14:34:07,197 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 51 states. [2020-07-20 14:34:08,081 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 14:34:08,469 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 14:34:08,843 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-20 14:34:09,204 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 14:34:09,570 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-20 14:34:09,882 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-20 14:34:10,178 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 14:34:10,483 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 14:34:10,755 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 14:34:11,016 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 14:34:11,277 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 14:34:11,534 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 14:34:14,060 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 14:34:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:34:14,070 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-20 14:34:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-20 14:34:14,072 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2020-07-20 14:34:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:34:14,073 INFO L225 Difference]: With dead ends: 65 [2020-07-20 14:34:14,073 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 14:34:14,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1942, Invalid=4064, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 14:34:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 14:34:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-20 14:34:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 14:34:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-20 14:34:14,098 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-20 14:34:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:34:14,098 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-20 14:34:14,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-20 14:34:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-20 14:34:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 14:34:14,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:34:14,108 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:34:14,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:34:14,310 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:34:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:34:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash -765796787, now seen corresponding path program 5 times [2020-07-20 14:34:14,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:34:14,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212195244] [2020-07-20 14:34:14,311 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 14:34:14,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:34:14,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:34:14,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-20 14:34:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:34:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:16,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:34:16,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:34:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:34:22,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212195244] [2020-07-20 14:34:22,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:34:22,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 99 [2020-07-20 14:34:22,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449720674] [2020-07-20 14:34:22,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-20 14:34:22,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:34:22,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-20 14:34:22,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2407, Invalid=7295, Unknown=0, NotChecked=0, Total=9702 [2020-07-20 14:34:22,227 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 99 states. [2020-07-20 14:34:25,574 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 14:34:26,918 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-20 14:34:27,857 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-20 14:34:29,191 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-20 14:34:30,208 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-20 14:34:31,441 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-20 14:34:32,636 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-20 14:34:33,797 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-20 14:34:34,950 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-20 14:34:36,098 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-20 14:34:37,216 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-20 14:34:38,329 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 14:34:39,419 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-20 14:34:40,493 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 14:34:41,559 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-20 14:34:42,560 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 14:34:43,558 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 14:34:44,523 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-20 14:34:45,479 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-20 14:34:46,414 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-20 14:34:47,330 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-20 14:34:48,218 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-20 14:34:49,094 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 14:34:49,945 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-20 14:34:50,796 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 14:34:51,610 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-20 14:34:52,390 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 14:34:53,141 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 14:34:53,872 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 14:34:54,581 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-20 14:34:55,279 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 14:34:55,955 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 14:34:56,602 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 14:34:57,226 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 14:34:57,826 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 14:34:58,393 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 14:34:58,932 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 14:34:59,465 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 14:35:05,156 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-20 14:35:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:05,171 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-20 14:35:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-20 14:35:05,173 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 58 [2020-07-20 14:35:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:05,175 INFO L225 Difference]: With dead ends: 113 [2020-07-20 14:35:05,175 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 14:35:05,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=7318, Invalid=15032, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 14:35:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 14:35:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-20 14:35:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 14:35:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-20 14:35:05,206 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-20 14:35:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:05,206 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-20 14:35:05,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-20 14:35:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-20 14:35:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 14:35:05,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:05,210 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:05,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:05,425 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:05,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1152480077, now seen corresponding path program 6 times [2020-07-20 14:35:05,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:05,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515420543] [2020-07-20 14:35:05,427 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:05,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:05,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:05,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-20 14:35:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:14,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:15,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:41,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515420543] [2020-07-20 14:35:41,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:41,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 195 [2020-07-20 14:35:41,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330252163] [2020-07-20 14:35:41,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 195 states [2020-07-20 14:35:41,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2020-07-20 14:35:41,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9415, Invalid=28415, Unknown=0, NotChecked=0, Total=37830 [2020-07-20 14:35:41,154 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 195 states. [2020-07-20 14:35:58,879 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-20 14:36:08,135 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-20 14:36:11,424 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-20 14:36:22,012 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-20 14:36:25,693 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-20 14:36:37,006 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-20 14:36:49,529 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-20 14:37:03,414 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-20 14:37:18,244 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-20 14:37:31,838 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-20 14:37:49,061 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-20 14:38:07,092 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-20 14:38:26,537 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-20 14:38:47,104 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 14:39:08,582 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-20 14:39:31,132 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-20 14:39:55,021 WARN L193 SmtUtils]: Spent 3.47 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-20 14:40:19,127 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-20 14:40:44,491 WARN L193 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-20 14:41:10,618 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 14:41:37,445 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-20 14:42:05,026 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-20 14:42:33,087 WARN L193 SmtUtils]: Spent 3.89 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 14:43:01,642 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-20 14:43:30,594 WARN L193 SmtUtils]: Spent 3.99 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-20 14:43:59,702 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-20 14:44:28,623 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-20 14:44:58,691 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-20 14:45:29,359 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-20 14:45:59,647 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-20 14:46:30,323 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-20 14:47:00,685 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-20 14:47:30,810 WARN L193 SmtUtils]: Spent 3.96 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-20 14:48:00,351 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-20 14:48:26,401 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 322