/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 BIGGEST_EQUIVALENCE_CLASS --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 [2020-07-21 00:31:21,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:21,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:21,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:31:21,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:21,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:21,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:21,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:21,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:21,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:21,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:21,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:21,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:21,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:21,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:21,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:21,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:21,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:21,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:21,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:21,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:21,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:21,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:21,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:21,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:21,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:31:21,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:31:21,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:31:21,283 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 [2020-07-21 00:31:21,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:21,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:21,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:21,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:21,300 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:21,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:21,300 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:21,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:21,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:21,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:21,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:21,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:21,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:21,301 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:21,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:21,302 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:21,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:21,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:21,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:21,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:21,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:21,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:21,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:21,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:21,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:21,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:21,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:21,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:21,304 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 00:31:21,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:21,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:21,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:21,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:21,589 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:21,590 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 00:31:21,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97c9946c/b34aa7f50d6e4bec999ed46f6fa2180d/FLAG43a4db50a [2020-07-21 00:31:22,135 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:22,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 00:31:22,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97c9946c/b34aa7f50d6e4bec999ed46f6fa2180d/FLAG43a4db50a [2020-07-21 00:31:22,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97c9946c/b34aa7f50d6e4bec999ed46f6fa2180d [2020-07-21 00:31:22,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:22,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:22,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:22,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:22,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:22,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c92c8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22, skipping insertion in model container [2020-07-21 00:31:22,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:22,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:22,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:22,759 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:22,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:22,912 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:22,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22 WrapperNode [2020-07-21 00:31:22,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:22,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:22,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:22,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:22,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (1/1) ... [2020-07-21 00:31:22,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:22,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:22,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:22,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:22,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (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 [2020-07-21 00:31:23,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 00:31:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 00:31:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 00:31:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 00:31:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 00:31:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 00:31:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 00:31:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 00:31:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 00:31:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 00:31:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:23,482 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:23,482 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 00:31:23,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:23 BoogieIcfgContainer [2020-07-21 00:31:23,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:23,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:23,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:23,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:23,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:22" (1/3) ... [2020-07-21 00:31:23,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70146068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:23, skipping insertion in model container [2020-07-21 00:31:23,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:22" (2/3) ... [2020-07-21 00:31:23,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70146068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:23, skipping insertion in model container [2020-07-21 00:31:23,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:23" (3/3) ... [2020-07-21 00:31:23,495 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-21 00:31:23,506 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:23,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:23,528 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:23,551 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:23,551 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:23,551 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:23,551 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:23,551 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:23,551 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:23,552 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:23,552 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 00:31:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 00:31:23,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:23,577 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] [2020-07-21 00:31:23,578 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:23,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 00:31:23,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:23,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036958911] [2020-07-21 00:31:23,590 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 [2020-07-21 00:31:23,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:23,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:23,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 00:31:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:23,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:23,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036958911] [2020-07-21 00:31:23,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:23,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:23,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855769202] [2020-07-21 00:31:23,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:23,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:23,811 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-21 00:31:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:23,947 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-21 00:31:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:23,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-21 00:31:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:23,962 INFO L225 Difference]: With dead ends: 126 [2020-07-21 00:31:23,963 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 00:31:23,968 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 [2020-07-21 00:31:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 00:31:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-21 00:31:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 00:31:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-21 00:31:24,024 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-21 00:31:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:24,025 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-21 00:31:24,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-21 00:31:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 00:31:24,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:24,029 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] [2020-07-21 00:31:24,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,245 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-21 00:31:24,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:24,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294905840] [2020-07-21 00:31:24,246 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 [2020-07-21 00:31:24,301 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 00:31:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:24,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:24,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294905840] [2020-07-21 00:31:24,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:24,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:24,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449345770] [2020-07-21 00:31:24,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:24,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:24,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:24,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:24,359 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-21 00:31:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:24,445 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-21 00:31:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 00:31:24,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-21 00:31:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:24,449 INFO L225 Difference]: With dead ends: 113 [2020-07-21 00:31:24,449 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 00:31:24,450 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 [2020-07-21 00:31:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 00:31:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-21 00:31:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 00:31:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-21 00:31:24,480 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-21 00:31:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:24,480 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-21 00:31:24,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-21 00:31:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:31:24,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:24,486 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] [2020-07-21 00:31:24,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,698 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-21 00:31:24,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:24,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004223356] [2020-07-21 00:31:24,700 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 [2020-07-21 00:31:24,745 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:24,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 00:31:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:24,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:24,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004223356] [2020-07-21 00:31:24,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:24,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:24,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364770775] [2020-07-21 00:31:24,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:24,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:24,780 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-21 00:31:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:24,838 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-21 00:31:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 00:31:24,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 00:31:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:24,841 INFO L225 Difference]: With dead ends: 124 [2020-07-21 00:31:24,841 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:31:24,842 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 [2020-07-21 00:31:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:31:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-21 00:31:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:31:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-21 00:31:24,854 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-21 00:31:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:24,854 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-21 00:31:24,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-21 00:31:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:31:24,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:24,856 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] [2020-07-21 00:31:25,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:25,071 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-21 00:31:25,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:25,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350598583] [2020-07-21 00:31:25,073 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 [2020-07-21 00:31:25,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:25,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:25,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 00:31:25,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:25,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:25,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350598583] [2020-07-21 00:31:25,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:25,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:25,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779281500] [2020-07-21 00:31:25,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:25,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:25,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:25,157 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-21 00:31:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:25,241 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-21 00:31:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:25,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 00:31:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:25,244 INFO L225 Difference]: With dead ends: 128 [2020-07-21 00:31:25,244 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 00:31:25,245 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 [2020-07-21 00:31:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 00:31:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-21 00:31:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 00:31:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-21 00:31:25,260 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-21 00:31:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:25,261 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-21 00:31:25,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-21 00:31:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 00:31:25,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:25,263 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] [2020-07-21 00:31:25,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:25,476 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-21 00:31:25,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:25,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817071770] [2020-07-21 00:31:25,478 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 [2020-07-21 00:31:25,522 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:25,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:25,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817071770] [2020-07-21 00:31:25,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:25,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:25,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228243335] [2020-07-21 00:31:25,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:25,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:25,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:25,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:25,560 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-21 00:31:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:25,686 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-21 00:31:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:31:25,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-21 00:31:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:25,688 INFO L225 Difference]: With dead ends: 133 [2020-07-21 00:31:25,688 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 00:31:25,689 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 [2020-07-21 00:31:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 00:31:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-21 00:31:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 00:31:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-21 00:31:25,700 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-21 00:31:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:25,700 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-21 00:31:25,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-21 00:31:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:31:25,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:25,703 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] [2020-07-21 00:31:25,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:25,916 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-21 00:31:25,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:25,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644624324] [2020-07-21 00:31:25,917 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 [2020-07-21 00:31:25,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:25,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:26,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:26,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644624324] [2020-07-21 00:31:26,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:26,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 00:31:26,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799991466] [2020-07-21 00:31:26,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:31:26,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:31:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:31:26,105 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-21 00:31:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:26,208 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-21 00:31:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:31:26,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-21 00:31:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:26,211 INFO L225 Difference]: With dead ends: 147 [2020-07-21 00:31:26,211 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:31:26,212 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 [2020-07-21 00:31:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:31:26,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-21 00:31:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 00:31:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-21 00:31:26,223 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-21 00:31:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:26,224 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-21 00:31:26,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:31:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-21 00:31:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 00:31:26,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:26,226 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] [2020-07-21 00:31:26,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:26,440 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:26,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-21 00:31:26,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:26,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761490041] [2020-07-21 00:31:26,442 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 [2020-07-21 00:31:26,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:26,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:31:26,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:26,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:26,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761490041] [2020-07-21 00:31:26,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:26,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 00:31:26,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238183054] [2020-07-21 00:31:26,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:31:26,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:31:26,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:26,649 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-21 00:31:33,049 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 00:31:35,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:35,287 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-21 00:31:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:31:35,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-21 00:31:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:35,290 INFO L225 Difference]: With dead ends: 172 [2020-07-21 00:31:35,290 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 00:31:35,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:31:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 00:31:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-21 00:31:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 00:31:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-21 00:31:35,304 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-21 00:31:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:35,305 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-21 00:31:35,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:31:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-21 00:31:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-21 00:31:35,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:35,306 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] [2020-07-21 00:31:35,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:35,508 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-21 00:31:35,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:35,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617905202] [2020-07-21 00:31:35,510 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 [2020-07-21 00:31:35,559 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:35,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:35,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:35,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:35,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617905202] [2020-07-21 00:31:35,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:35,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 00:31:35,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280385940] [2020-07-21 00:31:35,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:31:35,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:31:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:31:35,830 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-21 00:31:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:36,019 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-21 00:31:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 00:31:36,025 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-21 00:31:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:36,026 INFO L225 Difference]: With dead ends: 210 [2020-07-21 00:31:36,027 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 00:31:36,029 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 [2020-07-21 00:31:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 00:31:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-21 00:31:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 00:31:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-21 00:31:36,061 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-21 00:31:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:36,062 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-21 00:31:36,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:31:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-21 00:31:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 00:31:36,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:36,066 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] [2020-07-21 00:31:36,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:36,280 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-21 00:31:36,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:36,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086402748] [2020-07-21 00:31:36,282 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 [2020-07-21 00:31:36,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:36,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:31:36,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:36,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:36,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086402748] [2020-07-21 00:31:36,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:36,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 00:31:36,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118984990] [2020-07-21 00:31:36,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:31:36,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:31:36,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:31:36,765 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-21 00:31:43,775 WARN L193 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 00:31:58,829 WARN L193 SmtUtils]: Spent 8.62 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 00:32:27,937 WARN L193 SmtUtils]: Spent 18.68 s on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-21 00:32:39,135 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 00:32:49,717 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 00:32:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:58,565 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-21 00:32:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 00:32:58,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-21 00:32:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:58,568 INFO L225 Difference]: With dead ends: 242 [2020-07-21 00:32:58,569 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 00:32:58,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 74.4s TimeCoverageRelationStatistics Valid=318, Invalid=600, Unknown=12, NotChecked=0, Total=930 [2020-07-21 00:32:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 00:32:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-21 00:32:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-21 00:32:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-21 00:32:58,590 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-21 00:32:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:58,590 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-21 00:32:58,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:32:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-21 00:32:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 00:32:58,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:58,592 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] [2020-07-21 00:32:58,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:58,807 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-21 00:32:58,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:58,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209808046] [2020-07-21 00:32:58,808 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 [2020-07-21 00:32:58,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:32:58,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:32:59,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:32:59,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209808046] [2020-07-21 00:32:59,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:59,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 00:32:59,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232316427] [2020-07-21 00:32:59,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 00:32:59,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:59,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 00:32:59,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:32:59,525 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-21 00:32:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:59,965 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-21 00:32:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 00:32:59,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-21 00:32:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:59,970 INFO L225 Difference]: With dead ends: 336 [2020-07-21 00:32:59,970 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 00:32:59,972 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 [2020-07-21 00:32:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 00:32:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-21 00:32:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-21 00:33:00,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-21 00:33:00,003 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-21 00:33:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:00,003 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-21 00:33:00,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 00:33:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-21 00:33:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 00:33:00,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:00,005 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] [2020-07-21 00:33:00,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:00,219 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:00,220 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-21 00:33:00,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:00,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555336475] [2020-07-21 00:33:00,221 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 [2020-07-21 00:33:00,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:33:00,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:00,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 00:33:00,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:33:00,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:33:01,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555336475] [2020-07-21 00:33:01,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:01,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 00:33:01,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969306812] [2020-07-21 00:33:01,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 00:33:01,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 00:33:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 00:33:01,561 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-21 00:33:24,232 WARN L193 SmtUtils]: Spent 14.77 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 00:33:42,312 WARN L193 SmtUtils]: Spent 10.45 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 00:34:02,795 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 00:34:26,490 WARN L193 SmtUtils]: Spent 6.64 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 00:34:51,959 WARN L193 SmtUtils]: Spent 10.51 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 00:35:24,370 WARN L193 SmtUtils]: Spent 14.70 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 00:35:40,595 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 00:35:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:53,066 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-21 00:35:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 00:35:53,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-21 00:35:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:53,073 INFO L225 Difference]: With dead ends: 346 [2020-07-21 00:35:53,074 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 00:35:53,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 159.0s TimeCoverageRelationStatistics Valid=922, Invalid=2234, Unknown=36, NotChecked=0, Total=3192 [2020-07-21 00:35:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 00:35:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-21 00:35:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 00:35:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-21 00:35:53,114 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-21 00:35:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:53,117 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-21 00:35:53,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 00:35:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-21 00:35:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 00:35:53,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:53,121 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] [2020-07-21 00:35:53,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:53,336 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:53,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-21 00:35:53,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:53,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074712201] [2020-07-21 00:35:53,338 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 [2020-07-21 00:35:53,430 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:35:53,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 00:35:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:35:54,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:35:56,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074712201] [2020-07-21 00:35:56,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:56,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 00:35:56,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085847382] [2020-07-21 00:35:56,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 00:35:56,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 00:35:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 00:35:56,494 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-21 00:35:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:58,504 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-21 00:35:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 00:35:58,506 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-21 00:35:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:58,517 INFO L225 Difference]: With dead ends: 570 [2020-07-21 00:35:58,517 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 00:35:58,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 00:35:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 00:35:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-21 00:35:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 00:35:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-21 00:35:58,569 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-21 00:35:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:58,570 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-21 00:35:58,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 00:35:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-21 00:35:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 00:35:58,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:58,573 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] [2020-07-21 00:35:58,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:58,788 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-21 00:35:58,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:58,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192392786] [2020-07-21 00:35:58,790 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 [2020-07-21 00:35:58,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 00:35:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:35:58,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:58,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192392786] [2020-07-21 00:35:58,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:58,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 00:35:58,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084849711] [2020-07-21 00:35:58,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 00:35:58,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 00:35:58,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 00:35:58,902 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 3 states. [2020-07-21 00:35:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:58,923 INFO L93 Difference]: Finished difference Result 209 states and 323 transitions. [2020-07-21 00:35:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 00:35:58,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-07-21 00:35:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:58,928 INFO L225 Difference]: With dead ends: 209 [2020-07-21 00:35:58,928 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:35:58,929 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 [2020-07-21 00:35:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:35:58,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 00:35:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 00:35:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 309 transitions. [2020-07-21 00:35:58,948 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 309 transitions. Word has length 122 [2020-07-21 00:35:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:58,949 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 309 transitions. [2020-07-21 00:35:58,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 00:35:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 309 transitions. [2020-07-21 00:35:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 00:35:58,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:58,952 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] [2020-07-21 00:35:59,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:59,170 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1044966756, now seen corresponding path program 1 times [2020-07-21 00:35:59,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:59,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491712654] [2020-07-21 00:35:59,172 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 [2020-07-21 00:35:59,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:59,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:59,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 00:35:59,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:35:59,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:59,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491712654] [2020-07-21 00:35:59,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:59,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:35:59,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810808758] [2020-07-21 00:35:59,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:35:59,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:59,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:35:59,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:35:59,342 INFO L87 Difference]: Start difference. First operand 198 states and 309 transitions. Second operand 4 states. [2020-07-21 00:35:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:59,386 INFO L93 Difference]: Finished difference Result 210 states and 323 transitions. [2020-07-21 00:35:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 00:35:59,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-07-21 00:35:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:59,392 INFO L225 Difference]: With dead ends: 210 [2020-07-21 00:35:59,392 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:35:59,397 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 [2020-07-21 00:35:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:35:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 00:35:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 00:35:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-21 00:35:59,423 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 124 [2020-07-21 00:35:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:59,423 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-21 00:35:59,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:35:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-21 00:35:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 00:35:59,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:59,426 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] [2020-07-21 00:35:59,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:59,642 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 1 times [2020-07-21 00:35:59,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:59,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58887951] [2020-07-21 00:35:59,646 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 [2020-07-21 00:35:59,767 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:59,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:35:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 00:35:59,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:59,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58887951] [2020-07-21 00:35:59,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:59,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 00:35:59,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612746066] [2020-07-21 00:35:59,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:35:59,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:59,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:35:59,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:35:59,922 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 8 states. [2020-07-21 00:36:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:00,210 INFO L93 Difference]: Finished difference Result 238 states and 363 transitions. [2020-07-21 00:36:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:36:00,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-07-21 00:36:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:00,217 INFO L225 Difference]: With dead ends: 238 [2020-07-21 00:36:00,217 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 00:36:00,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:36:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 00:36:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 213. [2020-07-21 00:36:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-21 00:36:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 328 transitions. [2020-07-21 00:36:00,244 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 328 transitions. Word has length 124 [2020-07-21 00:36:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:00,245 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 328 transitions. [2020-07-21 00:36:00,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:36:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 328 transitions. [2020-07-21 00:36:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 00:36:00,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:00,247 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] [2020-07-21 00:36:00,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:00,461 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-07-21 00:36:00,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:00,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958186080] [2020-07-21 00:36:00,463 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 [2020-07-21 00:36:00,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:00,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:36:00,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 00:36:00,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:36:00,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958186080] [2020-07-21 00:36:00,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:36:00,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 00:36:00,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718177256] [2020-07-21 00:36:00,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:36:00,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:00,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:36:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:36:00,769 INFO L87 Difference]: Start difference. First operand 213 states and 328 transitions. Second operand 8 states. [2020-07-21 00:36:00,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:00,885 INFO L93 Difference]: Finished difference Result 224 states and 340 transitions. [2020-07-21 00:36:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:36:00,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-07-21 00:36:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:00,895 INFO L225 Difference]: With dead ends: 224 [2020-07-21 00:36:00,895 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 00:36:00,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:36:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 00:36:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-07-21 00:36:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 00:36:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 331 transitions. [2020-07-21 00:36:00,921 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 331 transitions. Word has length 124 [2020-07-21 00:36:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:00,921 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 331 transitions. [2020-07-21 00:36:00,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:36:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 331 transitions. [2020-07-21 00:36:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 00:36:00,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:00,924 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] [2020-07-21 00:36:01,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:01,138 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:01,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-07-21 00:36:01,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:01,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039066293] [2020-07-21 00:36:01,140 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 [2020-07-21 00:36:01,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:01,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:36:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:36:01,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:36:01,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039066293] [2020-07-21 00:36:01,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:36:01,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:36:01,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683852822] [2020-07-21 00:36:01,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:36:01,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:01,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:36:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:36:01,281 INFO L87 Difference]: Start difference. First operand 216 states and 331 transitions. Second operand 6 states. [2020-07-21 00:36:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:01,354 INFO L93 Difference]: Finished difference Result 222 states and 336 transitions. [2020-07-21 00:36:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:36:01,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 00:36:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:01,360 INFO L225 Difference]: With dead ends: 222 [2020-07-21 00:36:01,361 INFO L226 Difference]: Without dead ends: 216 [2020-07-21 00:36:01,363 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 [2020-07-21 00:36:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-21 00:36:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-07-21 00:36:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 00:36:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 330 transitions. [2020-07-21 00:36:01,385 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 330 transitions. Word has length 126 [2020-07-21 00:36:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:01,386 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 330 transitions. [2020-07-21 00:36:01,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:36:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 330 transitions. [2020-07-21 00:36:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 00:36:01,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:01,389 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] [2020-07-21 00:36:01,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:01,605 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-21 00:36:01,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:01,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440065456] [2020-07-21 00:36:01,607 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 [2020-07-21 00:36:01,696 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:36:01,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:36:01,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:36:01,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440065456] [2020-07-21 00:36:01,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:36:01,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:36:01,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808517267] [2020-07-21 00:36:01,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:36:01,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:01,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:36:01,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:36:01,746 INFO L87 Difference]: Start difference. First operand 216 states and 330 transitions. Second operand 6 states. [2020-07-21 00:36:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:01,824 INFO L93 Difference]: Finished difference Result 230 states and 344 transitions. [2020-07-21 00:36:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:36:01,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 00:36:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:01,829 INFO L225 Difference]: With dead ends: 230 [2020-07-21 00:36:01,830 INFO L226 Difference]: Without dead ends: 215 [2020-07-21 00:36:01,830 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 [2020-07-21 00:36:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-21 00:36:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2020-07-21 00:36:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-21 00:36:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 319 transitions. [2020-07-21 00:36:01,851 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 319 transitions. Word has length 126 [2020-07-21 00:36:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:01,852 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 319 transitions. [2020-07-21 00:36:01,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:36:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 319 transitions. [2020-07-21 00:36:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-21 00:36:01,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:01,855 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] [2020-07-21 00:36:02,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:02,069 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1043468215, now seen corresponding path program 1 times [2020-07-21 00:36:02,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:02,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522297122] [2020-07-21 00:36:02,070 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 [2020-07-21 00:36:02,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:02,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:02,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:36:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 00:36:02,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:36:02,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522297122] [2020-07-21 00:36:02,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:36:02,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 00:36:02,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251298624] [2020-07-21 00:36:02,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:36:02,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:36:02,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:36:02,257 INFO L87 Difference]: Start difference. First operand 210 states and 319 transitions. Second operand 6 states. [2020-07-21 00:36:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:02,323 INFO L93 Difference]: Finished difference Result 215 states and 323 transitions. [2020-07-21 00:36:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:36:02,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-07-21 00:36:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:02,327 INFO L225 Difference]: With dead ends: 215 [2020-07-21 00:36:02,327 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 00:36:02,328 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 [2020-07-21 00:36:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 00:36:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 00:36:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 00:36:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2020-07-21 00:36:02,345 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 128 [2020-07-21 00:36:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:02,346 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2020-07-21 00:36:02,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:36:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2020-07-21 00:36:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-21 00:36:02,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:02,348 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] [2020-07-21 00:36:02,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:02,563 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-07-21 00:36:02,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:02,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69268046] [2020-07-21 00:36:02,565 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 [2020-07-21 00:36:02,711 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:02,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:02,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:36:02,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 00:36:02,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:36:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 00:36:03,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69268046] [2020-07-21 00:36:03,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:36:03,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 00:36:03,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828495914] [2020-07-21 00:36:03,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:36:03,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:36:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:36:03,470 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand 15 states. [2020-07-21 00:36:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:03,940 INFO L93 Difference]: Finished difference Result 231 states and 344 transitions. [2020-07-21 00:36:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:36:03,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 131 [2020-07-21 00:36:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:03,945 INFO L225 Difference]: With dead ends: 231 [2020-07-21 00:36:03,946 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 00:36:03,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:36:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 00:36:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-21 00:36:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 00:36:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-07-21 00:36:03,970 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 131 [2020-07-21 00:36:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:03,971 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-07-21 00:36:03,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:36:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-07-21 00:36:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:36:03,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:03,973 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] [2020-07-21 00:36:04,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:04,188 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-07-21 00:36:04,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:04,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955381004] [2020-07-21 00:36:04,190 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 [2020-07-21 00:36:04,279 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:04,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:36:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 00:36:04,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:36:04,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955381004] [2020-07-21 00:36:04,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:36:04,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 00:36:04,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116063841] [2020-07-21 00:36:04,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 00:36:04,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:04,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 00:36:04,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:36:04,379 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 7 states. [2020-07-21 00:36:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:04,590 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2020-07-21 00:36:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:36:04,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-07-21 00:36:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:04,595 INFO L225 Difference]: With dead ends: 219 [2020-07-21 00:36:04,595 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 00:36:04,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:36:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 00:36:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 00:36:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 00:36:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-21 00:36:04,619 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-21 00:36:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:04,620 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-21 00:36:04,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 00:36:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-21 00:36:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:36:04,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:04,622 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] [2020-07-21 00:36:04,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:04,836 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-07-21 00:36:04,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:04,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098519404] [2020-07-21 00:36:04,838 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 [2020-07-21 00:36:04,925 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:04,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:36:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:07,114 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 [2020-07-21 00:36:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 00:36:07,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:36:09,288 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_mulflt_~b_51 Int)) (<= (mod v_mulflt_~b_51 4294967296) (mod c_main_~a~0 4294967296))) is different from false [2020-07-21 00:36:09,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098519404] [2020-07-21 00:36:09,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:36:09,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 00:36:09,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502078609] [2020-07-21 00:36:09,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:36:09,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:09,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:36:09,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=33, Unknown=2, NotChecked=22, Total=72 [2020-07-21 00:36:09,298 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 8 states. [2020-07-21 00:36:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:09,464 INFO L93 Difference]: Finished difference Result 240 states and 306 transitions. [2020-07-21 00:36:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:36:09,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-21 00:36:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:09,469 INFO L225 Difference]: With dead ends: 240 [2020-07-21 00:36:09,470 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 00:36:09,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=19, Invalid=43, Unknown=2, NotChecked=26, Total=90 [2020-07-21 00:36:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 00:36:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2020-07-21 00:36:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 00:36:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 278 transitions. [2020-07-21 00:36:09,516 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 278 transitions. Word has length 135 [2020-07-21 00:36:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:09,518 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 278 transitions. [2020-07-21 00:36:09,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:36:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 278 transitions. [2020-07-21 00:36:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:36:09,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:09,520 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] [2020-07-21 00:36:09,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:09,731 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-21 00:36:09,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:09,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978721342] [2020-07-21 00:36:09,733 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 [2020-07-21 00:36:09,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:36:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:36:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 00:36:10,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:36:10,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978721342] [2020-07-21 00:36:10,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:36:10,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 00:36:10,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075759482] [2020-07-21 00:36:10,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:36:10,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:36:10,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:36:10,580 INFO L87 Difference]: Start difference. First operand 216 states and 278 transitions. Second operand 9 states. [2020-07-21 00:36:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:10,900 INFO L93 Difference]: Finished difference Result 224 states and 290 transitions. [2020-07-21 00:36:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:36:10,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-21 00:36:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:10,901 INFO L225 Difference]: With dead ends: 224 [2020-07-21 00:36:10,901 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:36:10,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:36:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:36:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:36:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:36:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:36:10,913 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 00:36:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:10,914 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:36:10,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:36:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:36:10,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:36:11,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:11,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:36:11,940 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 358 [2020-07-21 00:36:12,082 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 358 [2020-07-21 00:36:12,246 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 358 [2020-07-21 00:36:12,404 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 358 [2020-07-21 00:36:12,522 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 358 [2020-07-21 00:36:12,846 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-07-21 00:36:15,528 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 106 DAG size of output: 26 [2020-07-21 00:36:17,006 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 924 DAG size of output: 20 [2020-07-21 00:36:17,022 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:36:17,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:36:17,022 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 00:36:17,023 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 00:36:17,023 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|))) [2020-07-21 00:36:17,023 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 00:36:17,023 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 00:36:17,023 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 00:36:17,024 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))) [2020-07-21 00:36:17,024 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 00:36:17,024 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 00:36:17,024 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 00:36:17,024 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-21 00:36:17,024 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 00:36:17,025 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))) [2020-07-21 00:36:17,025 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 00:36:17,025 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 00:36:17,025 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 00:36:17,025 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 00:36:17,025 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 00:36:17,025 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 00:36:17,026 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 00:36:17,026 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 00:36:17,026 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 00:36:17,026 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 00:36:17,027 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (exists ((v_mulflt_~a_34 Int)) (< (mod v_mulflt_~a_34 4294967296) (mod |mulflt_#in~b| 4294967296)))) (.cse2 (not (= 0 (mod |mulflt_#in~a| 4294967296)))) (.cse0 (= 0 mulflt_~__retres10~1))) (or (and .cse0 .cse1) (and (= mulflt_~a |mulflt_#in~a|) .cse1 .cse2) (and (= mulflt_~b |mulflt_#in~a|) .cse1 .cse2) (and (= mulflt_~b |mulflt_#in~b|) .cse0))) [2020-07-21 00:36:17,027 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 00:36:17,027 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:36:17,027 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:36:17,027 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:36:17,027 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 00:36:17,028 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 00:36:17,029 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 00:36:17,029 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 00:36:17,029 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 00:36:17,029 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 00:36:17,029 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 00:36:17,029 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 00:36:17,029 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)) [2020-07-21 00:36:17,030 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 00:36:17,030 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 00:36:17,030 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 (<= 1 main_~tmp~2) (<= 1 main_~sb~0)) (and .cse0 (<= (mod main_~b~0 4294967296) 0)) (<= (+ main_~sb~0 1) 0) (and (<= (mod main_~zero~0 4294967296) (mod main_~b~0 4294967296)) (= 0 main_~b~0)))) [2020-07-21 00:36:17,030 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 00:36:17,030 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 00:36:17,030 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 00:36:17,031 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 00:36:17,031 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 00:36:17,031 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 00:36:17,031 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 00:36:17,031 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 00:36:17,032 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 00:36:17,032 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 00:36:17,033 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 00:36:17,033 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 00:36:17,033 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 00:36:17,033 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 00:36:17,033 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 00:36:17,035 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 00:36:17,036 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 00:36:17,036 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 00:36:17,036 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 00:36:17,037 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 00:36:17,037 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 00:36:17,037 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 00:36:17,077 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,080 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,082 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,086 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,086 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,086 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:36:17 BoogieIcfgContainer [2020-07-21 00:36:17,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:36:17,098 INFO L168 Benchmark]: Toolchain (without parser) took 294616.86 ms. Allocated memory was 144.7 MB in the beginning and 275.8 MB in the end (delta: 131.1 MB). Free memory was 102.4 MB in the beginning and 187.8 MB in the end (delta: -85.4 MB). Peak memory consumption was 163.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:36:17,099 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 00:36:17,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.23 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 101.9 MB in the beginning and 180.8 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:36:17,100 INFO L168 Benchmark]: Boogie Preprocessor took 66.65 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 178.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:36:17,100 INFO L168 Benchmark]: RCFGBuilder took 506.73 ms. Allocated memory is still 201.9 MB. Free memory was 178.3 MB in the beginning and 152.9 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:36:17,101 INFO L168 Benchmark]: TraceAbstraction took 293605.07 ms. Allocated memory was 201.9 MB in the beginning and 275.8 MB in the end (delta: 73.9 MB). Free memory was 152.2 MB in the beginning and 187.8 MB in the end (delta: -35.6 MB). Peak memory consumption was 155.7 MB. Max. memory is 7.1 GB. [2020-07-21 00:36:17,104 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 430.23 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 101.9 MB in the beginning and 180.8 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.65 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 178.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 506.73 ms. Allocated memory is still 201.9 MB. Free memory was 178.3 MB in the beginning and 152.9 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 293605.07 ms. Allocated memory was 201.9 MB in the beginning and 275.8 MB in the end (delta: 73.9 MB). Free memory was 152.2 MB in the beginning and 187.8 MB in the end (delta: -35.6 MB). Peak memory consumption was 155.7 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: !(\old(m) % 4294967296 <= 0) || (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 00:36:17,127 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,128 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,128 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,129 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,135 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 00:36:17,135 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] Derived loop invariant: (((0 == __retres10 && (\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296)) || ((a == \old(a) && (\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296)) && !(0 == \old(a) % 4294967296))) || ((b == \old(a) && (\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296)) && !(0 == \old(a) % 4294967296))) || (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: 287.5s, OverallIterations: 23, TraceHistogramMax: 24, AutomataDifference: 267.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1622 SDtfs, 2880 SDslu, 7623 SDs, 0 SdLazy, 3323 SolverSat, 384 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 23.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3044 GetRequests, 2706 SyntacticMatches, 13 SemanticMatches, 325 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 250.9s 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, 736 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 226 PreInvPairs, 769 NumberOfFragments, 175 HoareAnnotationTreeSize, 226 FomulaSimplifications, 7919 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 18 FomulaSimplificationsInter, 10473 FormulaSimplificationTreeSizeReductionInter, 4.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 12.7s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 1884 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 2828 ConstructedInterpolants, 9 QuantifiedInterpolants, 597820 SizeOfPredicates, 45 NumberOfNonLiveVariables, 4924 ConjunctsInSsa, 243 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...