/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/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:08:00,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:08:00,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:08:00,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:08:00,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:08:00,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:08:00,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:08:00,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:08:00,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:08:00,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:08:00,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:08:00,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:08:00,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:08:00,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:08:00,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:08:00,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:08:00,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:08:00,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:08:00,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:08:00,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:08:00,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:08:00,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:08:00,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:08:00,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:08:00,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:08:00,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:08:00,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:08:00,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:08:00,563 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 21:08:00,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:08:00,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:08:00,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:08:00,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:08:00,587 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:08:00,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:08:00,588 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:08:00,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:08:00,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:08:00,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:08:00,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:08:00,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:08:00,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:08:00,589 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:08:00,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:08:00,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:08:00,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:08:00,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:08:00,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:08:00,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:08:00,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:08:00,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:08:00,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:08:00,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:08:00,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:08:00,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:08:00,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:00,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:08:00,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:08:00,592 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 21:08:00,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:08:00,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:08:00,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:08:00,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:08:00,892 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:08:00,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 21:08:00,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d381be3e2/1e3017cbdfd64b99a79a1af60182eff9/FLAG3917a351d [2020-07-20 21:08:01,454 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:08:01,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 21:08:01,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d381be3e2/1e3017cbdfd64b99a79a1af60182eff9/FLAG3917a351d [2020-07-20 21:08:01,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d381be3e2/1e3017cbdfd64b99a79a1af60182eff9 [2020-07-20 21:08:01,802 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:08:01,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:08:01,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:08:01,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:08:01,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:08:01,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c9a5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01, skipping insertion in model container [2020-07-20 21:08:01,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:08:01,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:08:02,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:08:02,096 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:08:02,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:08:02,244 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:08:02,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02 WrapperNode [2020-07-20 21:08:02,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:08:02,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:08:02,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:08:02,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:08:02,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (1/1) ... [2020-07-20 21:08:02,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (1/1) ... [2020-07-20 21:08:02,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (1/1) ... [2020-07-20 21:08:02,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (1/1) ... [2020-07-20 21:08:02,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (1/1) ... [2020-07-20 21:08:02,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (1/1) ... [2020-07-20 21:08:02,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (1/1) ... [2020-07-20 21:08:02,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:08:02,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:08:02,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:08:02,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:08:02,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (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 21:08:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:08:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:08:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 21:08:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 21:08:02,363 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 21:08:02,363 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 21:08:02,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:08:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:08:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 21:08:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 21:08:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 21:08:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 21:08:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 21:08:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 21:08:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:08:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:08:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:08:02,825 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:08:02,825 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 21:08:02,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:02 BoogieIcfgContainer [2020-07-20 21:08:02,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:08:02,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:08:02,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:08:02,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:08:02,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:08:01" (1/3) ... [2020-07-20 21:08:02,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dc5467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:02, skipping insertion in model container [2020-07-20 21:08:02,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:02" (2/3) ... [2020-07-20 21:08:02,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dc5467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:02, skipping insertion in model container [2020-07-20 21:08:02,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:02" (3/3) ... [2020-07-20 21:08:02,838 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-20 21:08:02,848 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:08:02,854 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:08:02,867 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:08:02,890 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:08:02,890 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:08:02,890 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:08:02,891 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:08:02,891 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:08:02,891 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:08:02,891 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:08:02,891 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:08:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-20 21:08:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 21:08:02,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:02,918 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:02,919 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-20 21:08:02,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:02,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419087255] [2020-07-20 21:08:02,937 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 21:08:03,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:03,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:08:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:03,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:03,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419087255] [2020-07-20 21:08:03,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:03,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:03,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527913187] [2020-07-20 21:08:03,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:03,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:03,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:03,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:03,175 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-20 21:08:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:03,350 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-20 21:08:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:08:03,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-20 21:08:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:03,365 INFO L225 Difference]: With dead ends: 126 [2020-07-20 21:08:03,365 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 21:08:03,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 21:08:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-20 21:08:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 21:08:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-20 21:08:03,426 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-20 21:08:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:03,427 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-20 21:08:03,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-20 21:08:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 21:08:03,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:03,431 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:03,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:03,646 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:03,647 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-20 21:08:03,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:03,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640900393] [2020-07-20 21:08:03,649 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 21:08:03,714 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:03,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:03,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:08:03,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:03,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:03,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640900393] [2020-07-20 21:08:03,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:03,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:03,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593377885] [2020-07-20 21:08:03,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:03,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:03,760 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-20 21:08:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:03,858 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-20 21:08:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:08:03,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-20 21:08:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:03,861 INFO L225 Difference]: With dead ends: 113 [2020-07-20 21:08:03,861 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 21:08:03,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 21:08:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-20 21:08:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 21:08:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-20 21:08:03,883 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-20 21:08:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:03,888 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-20 21:08:03,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-20 21:08:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:08:03,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:03,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:04,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:04,096 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:04,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-20 21:08:04,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:04,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112804994] [2020-07-20 21:08:04,098 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 21:08:04,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:04,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:08:04,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:04,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:04,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112804994] [2020-07-20 21:08:04,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:04,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:04,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265088651] [2020-07-20 21:08:04,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:04,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:04,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:04,179 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-20 21:08:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:04,252 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-20 21:08:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:08:04,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 21:08:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:04,254 INFO L225 Difference]: With dead ends: 124 [2020-07-20 21:08:04,255 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:08:04,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:08:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-20 21:08:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:08:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-20 21:08:04,272 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-20 21:08:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:04,272 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-20 21:08:04,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-20 21:08:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:08:04,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:04,275 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:04,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:04,489 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-20 21:08:04,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:04,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484344261] [2020-07-20 21:08:04,492 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 21:08:04,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:08:04,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:04,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:04,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484344261] [2020-07-20 21:08:04,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:04,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:04,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465778951] [2020-07-20 21:08:04,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:04,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:04,581 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-20 21:08:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:04,655 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-20 21:08:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:08:04,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 21:08:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:04,658 INFO L225 Difference]: With dead ends: 128 [2020-07-20 21:08:04,658 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 21:08:04,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 21:08:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-20 21:08:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 21:08:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-20 21:08:04,670 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-20 21:08:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:04,670 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-20 21:08:04,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-20 21:08:04,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 21:08:04,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:04,673 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:04,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:04,888 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:04,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-20 21:08:04,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:04,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866499378] [2020-07-20 21:08:04,891 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 21:08:04,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:04,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:04,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:08:04,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:04,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:04,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866499378] [2020-07-20 21:08:04,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:04,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:08:04,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297441585] [2020-07-20 21:08:04,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:08:04,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:08:04,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:04,999 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-20 21:08:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:05,129 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-20 21:08:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:08:05,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-20 21:08:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:05,131 INFO L225 Difference]: With dead ends: 133 [2020-07-20 21:08:05,131 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 21:08:05,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:08:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 21:08:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-20 21:08:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 21:08:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-20 21:08:05,144 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-20 21:08:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:05,144 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-20 21:08:05,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:08:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-20 21:08:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 21:08:05,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:05,146 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:05,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:05,360 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-20 21:08:05,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:05,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612688729] [2020-07-20 21:08:05,362 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 21:08:05,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:05,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:08:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:05,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:05,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612688729] [2020-07-20 21:08:05,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:05,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 21:08:05,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746851664] [2020-07-20 21:08:05,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:08:05,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:08:05,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:08:05,576 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-20 21:08:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:05,683 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-20 21:08:05,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:08:05,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-20 21:08:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:05,686 INFO L225 Difference]: With dead ends: 147 [2020-07-20 21:08:05,686 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 21:08:05,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:08:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 21:08:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-20 21:08:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 21:08:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-20 21:08:05,721 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-20 21:08:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:05,721 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-20 21:08:05,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:08:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-20 21:08:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 21:08:05,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:05,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:05,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:05,929 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-20 21:08:05,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:05,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779497801] [2020-07-20 21:08:05,930 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 21:08:05,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:05,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:05,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 21:08:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:06,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:06,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779497801] [2020-07-20 21:08:06,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:06,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 21:08:06,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787495672] [2020-07-20 21:08:06,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:08:06,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:08:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:08:06,168 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-20 21:08:10,568 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 21:08:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:10,751 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-20 21:08:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:08:10,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-20 21:08:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:10,754 INFO L225 Difference]: With dead ends: 172 [2020-07-20 21:08:10,754 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 21:08:10,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:08:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 21:08:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-20 21:08:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 21:08:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-20 21:08:10,768 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-20 21:08:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:10,768 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-20 21:08:10,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:08:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-20 21:08:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 21:08:10,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:10,770 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:10,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:10,978 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-20 21:08:10,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:10,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656338401] [2020-07-20 21:08:10,980 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:11,016 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:11,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:08:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:11,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:11,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656338401] [2020-07-20 21:08:11,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:11,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 21:08:11,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208284563] [2020-07-20 21:08:11,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:08:11,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:08:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:08:11,271 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-20 21:08:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:11,437 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-20 21:08:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 21:08:11,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-20 21:08:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:11,440 INFO L225 Difference]: With dead ends: 210 [2020-07-20 21:08:11,440 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 21:08:11,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:08:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 21:08:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-20 21:08:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 21:08:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-20 21:08:11,459 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-20 21:08:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:11,459 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-20 21:08:11,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:08:11,460 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-20 21:08:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 21:08:11,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:11,461 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:11,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:11,675 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-20 21:08:11,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:11,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229765394] [2020-07-20 21:08:11,678 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:11,726 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:11,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:11,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:08:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:11,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:12,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229765394] [2020-07-20 21:08:12,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:12,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 21:08:12,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592760972] [2020-07-20 21:08:12,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:08:12,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:08:12,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:08:12,175 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-20 21:08:19,013 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 21:08:52,269 WARN L193 SmtUtils]: Spent 31.08 s on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-07-20 21:09:07,019 WARN L193 SmtUtils]: Spent 14.54 s on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-20 21:09:17,621 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 21:09:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:30,629 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-20 21:09:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 21:09:30,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-20 21:09:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:30,632 INFO L225 Difference]: With dead ends: 242 [2020-07-20 21:09:30,632 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 21:09:30,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 78.0s TimeCoverageRelationStatistics Valid=319, Invalid=605, Unknown=6, NotChecked=0, Total=930 [2020-07-20 21:09:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 21:09:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-20 21:09:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 21:09:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-20 21:09:30,656 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-20 21:09:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:30,656 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-20 21:09:30,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:09:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-20 21:09:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-20 21:09:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:30,658 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:30,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:30,874 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-20 21:09:30,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:30,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14778413] [2020-07-20 21:09:30,876 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:30,931 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:09:30,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:09:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:09:31,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:09:31,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14778413] [2020-07-20 21:09:31,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:31,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 21:09:31,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658131520] [2020-07-20 21:09:31,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 21:09:31,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 21:09:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:09:31,618 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-20 21:09:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:32,019 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-20 21:09:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 21:09:32,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-20 21:09:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:32,028 INFO L225 Difference]: With dead ends: 336 [2020-07-20 21:09:32,029 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 21:09:32,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 21:09:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 21:09:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-20 21:09:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-20 21:09:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-20 21:09:32,079 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-20 21:09:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:32,080 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-20 21:09:32,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 21:09:32,080 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-20 21:09:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 21:09:32,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:32,082 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:32,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:32,296 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-20 21:09:32,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:32,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464464146] [2020-07-20 21:09:32,298 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:32,350 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:09:32,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 21:09:32,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:09:32,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:09:33,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464464146] [2020-07-20 21:09:33,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:33,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-20 21:09:33,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069654609] [2020-07-20 21:09:33,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 21:09:33,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 21:09:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:09:33,594 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-20 21:10:12,491 WARN L193 SmtUtils]: Spent 28.71 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-20 21:10:30,049 WARN L193 SmtUtils]: Spent 12.69 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-20 21:11:03,513 WARN L193 SmtUtils]: Spent 22.81 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 21:11:25,955 WARN L193 SmtUtils]: Spent 10.75 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 21:12:03,348 WARN L193 SmtUtils]: Spent 20.82 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 21:12:24,701 WARN L193 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 21:12:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:53,717 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-20 21:12:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 21:12:53,720 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-20 21:12:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:53,725 INFO L225 Difference]: With dead ends: 346 [2020-07-20 21:12:53,725 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 21:12:53,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 191.0s TimeCoverageRelationStatistics Valid=916, Invalid=2239, Unknown=37, NotChecked=0, Total=3192 [2020-07-20 21:12:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 21:12:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-20 21:12:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 21:12:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-20 21:12:53,762 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-20 21:12:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:53,764 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-20 21:12:53,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 21:12:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-20 21:12:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 21:12:53,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:53,767 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:53,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:53,995 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-20 21:12:53,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:53,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084637033] [2020-07-20 21:12:53,997 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:54,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:12:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 21:12:54,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:12:54,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:12:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:12:56,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084637033] [2020-07-20 21:12:56,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:12:56,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 21:12:56,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87707995] [2020-07-20 21:12:56,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 21:12:56,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:56,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 21:12:56,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 21:12:56,656 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-20 21:12:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:58,155 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-20 21:12:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 21:12:58,157 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-20 21:12:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:58,164 INFO L225 Difference]: With dead ends: 570 [2020-07-20 21:12:58,164 INFO L226 Difference]: Without dead ends: 450 [2020-07-20 21:12:58,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 21:12:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-20 21:12:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-20 21:12:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 21:12:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-20 21:12:58,205 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-20 21:12:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:58,206 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-20 21:12:58,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 21:12:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-20 21:12:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 21:12:58,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:58,208 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:58,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:58,424 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-20 21:12:58,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:58,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034388825] [2020-07-20 21:12:58,425 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:58,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:58,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:12:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:12:58,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:12:58,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034388825] [2020-07-20 21:12:58,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:12:58,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:12:58,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496691073] [2020-07-20 21:12:58,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:12:58,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:58,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:12:58,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:12:58,555 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 3 states. [2020-07-20 21:12:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:58,572 INFO L93 Difference]: Finished difference Result 209 states and 323 transitions. [2020-07-20 21:12:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:12:58,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-07-20 21:12:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:58,578 INFO L225 Difference]: With dead ends: 209 [2020-07-20 21:12:58,578 INFO L226 Difference]: Without dead ends: 198 [2020-07-20 21:12:58,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:12:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-20 21:12:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-20 21:12:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 21:12:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 309 transitions. [2020-07-20 21:12:58,597 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 309 transitions. Word has length 122 [2020-07-20 21:12:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:58,597 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 309 transitions. [2020-07-20 21:12:58,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:12:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 309 transitions. [2020-07-20 21:12:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 21:12:58,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:58,600 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:58,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:58,813 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1044966756, now seen corresponding path program 1 times [2020-07-20 21:12:58,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:58,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347892153] [2020-07-20 21:12:58,815 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:58,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:58,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:12:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:12:58,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:12:58,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347892153] [2020-07-20 21:12:58,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:12:58,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:12:58,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595104627] [2020-07-20 21:12:58,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:12:58,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:12:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:12:58,926 INFO L87 Difference]: Start difference. First operand 198 states and 309 transitions. Second operand 4 states. [2020-07-20 21:12:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:58,955 INFO L93 Difference]: Finished difference Result 210 states and 323 transitions. [2020-07-20 21:12:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:12:58,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-07-20 21:12:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:58,958 INFO L225 Difference]: With dead ends: 210 [2020-07-20 21:12:58,958 INFO L226 Difference]: Without dead ends: 198 [2020-07-20 21:12:58,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:12:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-20 21:12:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-20 21:12:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 21:12:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-20 21:12:58,977 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 124 [2020-07-20 21:12:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:58,978 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-20 21:12:58,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:12:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-20 21:12:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 21:12:58,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:58,980 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:59,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:59,194 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:59,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 1 times [2020-07-20 21:12:59,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:59,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637882418] [2020-07-20 21:12:59,195 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:59,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:12:59,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 21:12:59,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:12:59,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637882418] [2020-07-20 21:12:59,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:12:59,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:12:59,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501306779] [2020-07-20 21:12:59,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:12:59,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:12:59,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:12:59,350 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 7 states. [2020-07-20 21:12:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:59,447 INFO L93 Difference]: Finished difference Result 220 states and 335 transitions. [2020-07-20 21:12:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:12:59,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-07-20 21:12:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:59,453 INFO L225 Difference]: With dead ends: 220 [2020-07-20 21:12:59,454 INFO L226 Difference]: Without dead ends: 215 [2020-07-20 21:12:59,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:12:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-20 21:12:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-07-20 21:12:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 21:12:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 326 transitions. [2020-07-20 21:12:59,497 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 326 transitions. Word has length 124 [2020-07-20 21:12:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:59,497 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 326 transitions. [2020-07-20 21:12:59,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:12:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 326 transitions. [2020-07-20 21:12:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 21:12:59,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:59,500 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:59,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:59,716 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572994, now seen corresponding path program 1 times [2020-07-20 21:12:59,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:59,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266042323] [2020-07-20 21:12:59,718 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:59,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:12:59,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 21:12:59,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:12:59,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266042323] [2020-07-20 21:12:59,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:12:59,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 21:12:59,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380206492] [2020-07-20 21:12:59,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:12:59,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:12:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:12:59,896 INFO L87 Difference]: Start difference. First operand 212 states and 326 transitions. Second operand 8 states. [2020-07-20 21:13:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:00,092 INFO L93 Difference]: Finished difference Result 238 states and 361 transitions. [2020-07-20 21:13:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:13:00,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 126 [2020-07-20 21:13:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:00,095 INFO L225 Difference]: With dead ends: 238 [2020-07-20 21:13:00,095 INFO L226 Difference]: Without dead ends: 228 [2020-07-20 21:13:00,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:13:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-20 21:13:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 216. [2020-07-20 21:13:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-20 21:13:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 331 transitions. [2020-07-20 21:13:00,119 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 331 transitions. Word has length 126 [2020-07-20 21:13:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:00,119 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 331 transitions. [2020-07-20 21:13:00,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:13:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 331 transitions. [2020-07-20 21:13:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 21:13:00,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:00,122 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:00,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:00,338 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-07-20 21:13:00,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:00,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849944548] [2020-07-20 21:13:00,339 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:00,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:00,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:13:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:00,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:00,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849944548] [2020-07-20 21:13:00,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:00,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:00,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754960191] [2020-07-20 21:13:00,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:00,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:00,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:00,484 INFO L87 Difference]: Start difference. First operand 216 states and 331 transitions. Second operand 6 states. [2020-07-20 21:13:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:00,537 INFO L93 Difference]: Finished difference Result 222 states and 336 transitions. [2020-07-20 21:13:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:00,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 21:13:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:00,541 INFO L225 Difference]: With dead ends: 222 [2020-07-20 21:13:00,541 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 21:13:00,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 21:13:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-07-20 21:13:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-20 21:13:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 330 transitions. [2020-07-20 21:13:00,558 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 330 transitions. Word has length 126 [2020-07-20 21:13:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:00,559 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 330 transitions. [2020-07-20 21:13:00,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 330 transitions. [2020-07-20 21:13:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 21:13:00,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:00,561 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:00,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:00,775 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-20 21:13:00,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:00,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460507470] [2020-07-20 21:13:00,777 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:00,870 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 21:13:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:00,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:00,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460507470] [2020-07-20 21:13:00,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:00,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:00,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651607401] [2020-07-20 21:13:00,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:00,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:00,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:00,916 INFO L87 Difference]: Start difference. First operand 216 states and 330 transitions. Second operand 6 states. [2020-07-20 21:13:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:00,990 INFO L93 Difference]: Finished difference Result 230 states and 344 transitions. [2020-07-20 21:13:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:00,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 21:13:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:00,994 INFO L225 Difference]: With dead ends: 230 [2020-07-20 21:13:00,994 INFO L226 Difference]: Without dead ends: 215 [2020-07-20 21:13:00,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-20 21:13:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2020-07-20 21:13:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-20 21:13:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 319 transitions. [2020-07-20 21:13:01,011 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 319 transitions. Word has length 126 [2020-07-20 21:13:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:01,012 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 319 transitions. [2020-07-20 21:13:01,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 319 transitions. [2020-07-20 21:13:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 21:13:01,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:01,015 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:01,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:01,229 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:01,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1043468215, now seen corresponding path program 1 times [2020-07-20 21:13:01,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:01,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275631665] [2020-07-20 21:13:01,231 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:01,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:01,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:01,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 21:13:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 21:13:01,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:01,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275631665] [2020-07-20 21:13:01,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:01,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 21:13:01,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589551908] [2020-07-20 21:13:01,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:01,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:01,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:01,472 INFO L87 Difference]: Start difference. First operand 210 states and 319 transitions. Second operand 6 states. [2020-07-20 21:13:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:01,552 INFO L93 Difference]: Finished difference Result 215 states and 323 transitions. [2020-07-20 21:13:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:01,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-07-20 21:13:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:01,557 INFO L225 Difference]: With dead ends: 215 [2020-07-20 21:13:01,557 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 21:13:01,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 21:13:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-20 21:13:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 21:13:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2020-07-20 21:13:01,576 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 128 [2020-07-20 21:13:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:01,577 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2020-07-20 21:13:01,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2020-07-20 21:13:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-20 21:13:01,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:01,579 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:01,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:01,793 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-07-20 21:13:01,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:01,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802056868] [2020-07-20 21:13:01,794 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:02,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:02,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:13:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 21:13:02,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 21:13:02,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802056868] [2020-07-20 21:13:02,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:02,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 21:13:02,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039681071] [2020-07-20 21:13:02,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:13:02,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:02,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:13:02,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:13:02,544 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand 15 states. [2020-07-20 21:13:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:02,824 INFO L93 Difference]: Finished difference Result 231 states and 344 transitions. [2020-07-20 21:13:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:13:02,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 131 [2020-07-20 21:13:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:02,833 INFO L225 Difference]: With dead ends: 231 [2020-07-20 21:13:02,833 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 21:13:02,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:13:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 21:13:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-20 21:13:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-20 21:13:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-07-20 21:13:02,852 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 131 [2020-07-20 21:13:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:02,853 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-07-20 21:13:02,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:13:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-07-20 21:13:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:02,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:02,855 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:03,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:03,070 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-07-20 21:13:03,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:03,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155277024] [2020-07-20 21:13:03,072 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:03,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:03,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:03,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:13:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 21:13:03,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:03,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155277024] [2020-07-20 21:13:03,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:03,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:13:03,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392892919] [2020-07-20 21:13:03,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:13:03,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:03,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:13:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:03,476 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 7 states. [2020-07-20 21:13:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:03,619 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2020-07-20 21:13:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:13:03,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-07-20 21:13:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:03,624 INFO L225 Difference]: With dead ends: 219 [2020-07-20 21:13:03,624 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 21:13:03,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:13:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 21:13:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-20 21:13:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 21:13:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-20 21:13:03,644 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-20 21:13:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:03,644 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-20 21:13:03,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:13:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-20 21:13:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:03,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:03,676 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:03,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:03,883 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:03,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-07-20 21:13:03,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:03,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15413793] [2020-07-20 21:13:03,884 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:04,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:04,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:13:04,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:06,054 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_mulflt_~b_46 Int)) (< (mod |c_mulflt_#in~a| 4294967296) (mod v_mulflt_~b_46 4294967296))) is different from true [2020-07-20 21:13:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 21:13:06,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:09,034 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 21:13:09,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15413793] [2020-07-20 21:13:09,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:09,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 21:13:09,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036923156] [2020-07-20 21:13:09,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:13:09,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:09,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:13:09,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-07-20 21:13:09,037 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 8 states. [2020-07-20 21:13:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:09,167 INFO L93 Difference]: Finished difference Result 240 states and 306 transitions. [2020-07-20 21:13:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:13:09,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-20 21:13:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:09,175 INFO L225 Difference]: With dead ends: 240 [2020-07-20 21:13:09,175 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 21:13:09,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2020-07-20 21:13:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 21:13:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2020-07-20 21:13:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-20 21:13:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 278 transitions. [2020-07-20 21:13:09,203 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 278 transitions. Word has length 135 [2020-07-20 21:13:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:09,203 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 278 transitions. [2020-07-20 21:13:09,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:13:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 278 transitions. [2020-07-20 21:13:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:09,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:09,206 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:09,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:09,417 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:09,418 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-20 21:13:09,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:09,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472167498] [2020-07-20 21:13:09,418 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:09,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:09,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:13:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 21:13:10,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:10,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472167498] [2020-07-20 21:13:10,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:10,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 21:13:10,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985452366] [2020-07-20 21:13:10,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:13:10,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:10,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:13:10,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:13:10,295 INFO L87 Difference]: Start difference. First operand 216 states and 278 transitions. Second operand 9 states. [2020-07-20 21:13:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:10,459 INFO L93 Difference]: Finished difference Result 224 states and 290 transitions. [2020-07-20 21:13:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:13:10,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-20 21:13:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:10,460 INFO L225 Difference]: With dead ends: 224 [2020-07-20 21:13:10,460 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:13:10,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:13:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:13:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:13:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:13:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:13:10,463 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-20 21:13:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:10,463 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:13:10,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:13:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:13:10,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:13:10,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:10,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:13:11,143 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 21:13:11,264 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 21:13:11,380 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 21:13:11,518 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 21:13:11,627 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 21:13:11,886 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 21:13:12,423 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 26 [2020-07-20 21:13:13,338 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 20 [2020-07-20 21:13:13,347 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:13:13,348 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:13:13,348 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-20 21:13:13,348 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-20 21:13:13,348 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-20 21:13:13,348 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-20 21:13:13,348 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-20 21:13:13,349 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-20 21:13:13,349 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (or (not (= 1 |base2flt_#in~m|)) (< (mod base2flt_~m 4294967296) 16777216)) (<= base2flt_~e |base2flt_#in~e|) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-20 21:13:13,349 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-20 21:13:13,349 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-20 21:13:13,350 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-20 21:13:13,350 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-20 21:13:13,350 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-20 21:13:13,350 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-20 21:13:13,350 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-20 21:13:13,350 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-20 21:13:13,350 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-20 21:13:13,350 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-20 21:13:13,351 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-20 21:13:13,351 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-20 21:13:13,351 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-20 21:13:13,351 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-20 21:13:13,351 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-20 21:13:13,351 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-20 21:13:13,351 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (not (= 0 (mod |mulflt_#in~a| 4294967296)))) (.cse0 (exists ((v_mulflt_~a_34 Int)) (< (mod v_mulflt_~a_34 4294967296) (mod |mulflt_#in~b| 4294967296)))) (.cse2 (= 0 mulflt_~__retres10~1))) (or (and .cse0 (= mulflt_~b |mulflt_#in~a|) .cse1) (and .cse0 (= mulflt_~a |mulflt_#in~a|) .cse1) (and .cse0 .cse2) (and (= mulflt_~b |mulflt_#in~b|) .cse2))) [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:13:13,352 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-20 21:13:13,352 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-20 21:13:13,353 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-20 21:13:13,353 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 21:13:13,353 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-20 21:13:13,353 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-20 21:13:13,353 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-20 21:13:13,353 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-20 21:13:13,353 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-20 21:13:13,353 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-20 21:13:13,354 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-20 21:13:13,354 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 21:13:13,354 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (= 0 main_~a~0)) (and .cse0 (<= (mod main_~b~0 4294967296) 0)) (and (<= 1 main_~tmp~2) (<= 1 main_~sb~0)) (and (<= (mod main_~zero~0 4294967296) 0) (= 0 main_~b~0)) (<= (+ main_~sb~0 1) 0))) [2020-07-20 21:13:13,354 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-20 21:13:13,354 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 21:13:13,354 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-20 21:13:13,354 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-20 21:13:13,354 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-20 21:13:13,355 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 21:13:13,355 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-20 21:13:13,355 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-20 21:13:13,355 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-20 21:13:13,355 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 21:13:13,355 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-20 21:13:13,355 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-20 21:13:13,356 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-20 21:13:13,357 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-20 21:13:13,357 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-20 21:13:13,377 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,378 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,378 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,379 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,379 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,380 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:13:13 BoogieIcfgContainer [2020-07-20 21:13:13,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:13:13,386 INFO L168 Benchmark]: Toolchain (without parser) took 311581.88 ms. Allocated memory was 145.8 MB in the beginning and 295.7 MB in the end (delta: 149.9 MB). Free memory was 103.4 MB in the beginning and 148.3 MB in the end (delta: -44.9 MB). Peak memory consumption was 152.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:13,386 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:13:13,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 437.71 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 103.0 MB in the beginning and 182.2 MB in the end (delta: -79.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:13,387 INFO L168 Benchmark]: Boogie Preprocessor took 53.24 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 179.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:13,388 INFO L168 Benchmark]: RCFGBuilder took 531.10 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 154.3 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:13,388 INFO L168 Benchmark]: TraceAbstraction took 310552.47 ms. Allocated memory was 203.4 MB in the beginning and 295.7 MB in the end (delta: 92.3 MB). Free memory was 153.7 MB in the beginning and 148.3 MB in the end (delta: 5.3 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:13,390 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 437.71 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 103.0 MB in the beginning and 182.2 MB in the end (delta: -79.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.24 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 179.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 531.10 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 154.3 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 310552.47 ms. Allocated memory was 203.4 MB in the beginning and 295.7 MB in the end (delta: 92.3 MB). Free memory was 153.7 MB in the beginning and 148.3 MB in the end (delta: 5.3 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-20 21:13:13,397 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,397 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,397 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,398 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,398 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-20 21:13:13,398 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] Derived loop invariant: (((((\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296) && b == \old(a)) && !(0 == \old(a) % 4294967296)) || (((\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296) && a == \old(a)) && !(0 == \old(a) % 4294967296))) || ((\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296) && 0 == __retres10)) || (b == \old(b) && 0 == __retres10) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((!(1 == \old(m)) || m % 4294967296 < 16777216) && e <= \old(e)) && !(\old(m) % 4294967296 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 307.7s, OverallIterations: 23, TraceHistogramMax: 24, AutomataDifference: 287.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1622 SDtfs, 2871 SDslu, 7650 SDs, 0 SdLazy, 3335 SolverSat, 383 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 11.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3047 GetRequests, 2709 SyntacticMatches, 13 SemanticMatches, 325 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 283.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 23 MinimizatonAttempts, 733 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 226 PreInvPairs, 769 NumberOfFragments, 173 HoareAnnotationTreeSize, 226 FomulaSimplifications, 8044 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 18 FomulaSimplificationsInter, 10288 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 2199 NumberOfCodeBlocks, 1400 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 2830 ConstructedInterpolants, 9 QuantifiedInterpolants, 596194 SizeOfPredicates, 44 NumberOfNonLiveVariables, 4613 ConjunctsInSsa, 239 ConjunctsInUnsatCore, 31 InterpolantComputations, 12 PerfectInterpolantSequences, 10804/13369 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...