/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:27:59,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:27:59,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:27:59,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:27:59,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:27:59,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:27:59,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:27:59,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:27:59,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:27:59,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:27:59,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:27:59,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:27:59,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:27:59,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:27:59,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:27:59,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:27:59,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:27:59,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:27:59,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:27:59,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:27:59,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:27:59,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:27:59,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:27:59,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:27:59,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 16:27:59,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 16:27:59,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 16:27:59,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 16:27:59,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 16:27:59,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 16:27:59,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:27:59,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:27:59,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:27:59,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:27:59,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:27:59,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:27:59,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:27:59,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:27:59,606 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:27:59,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:27:59,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:27:59,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:27:59,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:27:59,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:27:59,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:27:59,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:27:59,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:27:59,607 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:27:59,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:27:59,608 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:27:59,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:27:59,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:27:59,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:27:59,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:27:59,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:27:59,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:27:59,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:27:59,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:27:59,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:27:59,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:27:59,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:59,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:27:59,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:27:59,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:27:59,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:27:59,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:27:59,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:27:59,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:27:59,912 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:27:59,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 16:27:59,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee74bbf1c/6b53ad8b6c5740669c2cdf3cc2e19114/FLAG63b8bba5a [2020-07-20 16:28:00,482 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:28:00,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 16:28:00,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee74bbf1c/6b53ad8b6c5740669c2cdf3cc2e19114/FLAG63b8bba5a [2020-07-20 16:28:00,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee74bbf1c/6b53ad8b6c5740669c2cdf3cc2e19114 [2020-07-20 16:28:00,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:28:00,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:28:00,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:00,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:28:00,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:28:00,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efdcb75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00, skipping insertion in model container [2020-07-20 16:28:00,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:28:00,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:28:01,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:01,142 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:28:01,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:01,283 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:28:01,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01 WrapperNode [2020-07-20 16:28:01,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:01,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:28:01,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:28:01,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:28:01,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... [2020-07-20 16:28:01,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... [2020-07-20 16:28:01,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... [2020-07-20 16:28:01,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... [2020-07-20 16:28:01,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... [2020-07-20 16:28:01,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... [2020-07-20 16:28:01,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... [2020-07-20 16:28:01,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:28:01,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:28:01,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:28:01,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:28:01,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:28:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:28:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:28:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 16:28:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 16:28:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 16:28:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 16:28:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:28:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:28:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 16:28:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 16:28:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 16:28:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 16:28:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 16:28:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 16:28:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:28:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:28:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:28:01,886 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:28:01,886 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 16:28:01,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:01 BoogieIcfgContainer [2020-07-20 16:28:01,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:28:01,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:28:01,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:28:01,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:28:01,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:28:00" (1/3) ... [2020-07-20 16:28:01,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5318f5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:01, skipping insertion in model container [2020-07-20 16:28:01,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:01" (2/3) ... [2020-07-20 16:28:01,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5318f5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:01, skipping insertion in model container [2020-07-20 16:28:01,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:01" (3/3) ... [2020-07-20 16:28:01,899 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-20 16:28:01,909 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:28:01,916 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:28:01,929 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:28:01,952 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:28:01,952 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:28:01,952 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:28:01,952 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:28:01,952 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:28:01,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:28:01,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:28:01,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:28:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-20 16:28:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 16:28:01,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:01,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:01,979 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-20 16:28:01,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:01,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740797616] [2020-07-20 16:28:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:02,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 16:28:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 16:28:02,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:02,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740797616] [2020-07-20 16:28:02,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:28:02,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 16:28:02,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984719260] [2020-07-20 16:28:02,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:28:02,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:02,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:28:02,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:28:02,300 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 6 states. [2020-07-20 16:28:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:02,434 INFO L93 Difference]: Finished difference Result 135 states and 209 transitions. [2020-07-20 16:28:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:28:02,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-07-20 16:28:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:02,451 INFO L225 Difference]: With dead ends: 135 [2020-07-20 16:28:02,451 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 16:28:02,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:28:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 16:28:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-07-20 16:28:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 16:28:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 99 transitions. [2020-07-20 16:28:02,516 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 99 transitions. Word has length 48 [2020-07-20 16:28:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:02,517 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 99 transitions. [2020-07-20 16:28:02,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:28:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 99 transitions. [2020-07-20 16:28:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 16:28:02,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:02,526 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, 1, 1, 1, 1] [2020-07-20 16:28:02,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:02,740 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -243075725, now seen corresponding path program 1 times [2020-07-20 16:28:02,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:02,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959403894] [2020-07-20 16:28:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:02,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:02,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:02,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 16:28:02,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:02,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:02,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959403894] [2020-07-20 16:28:02,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:02,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:28:02,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673917091] [2020-07-20 16:28:02,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:28:02,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:28:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:28:02,859 INFO L87 Difference]: Start difference. First operand 69 states and 99 transitions. Second operand 4 states. [2020-07-20 16:28:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:02,971 INFO L93 Difference]: Finished difference Result 135 states and 194 transitions. [2020-07-20 16:28:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:28:02,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 16:28:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:02,975 INFO L225 Difference]: With dead ends: 135 [2020-07-20 16:28:02,976 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 16:28:02,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:28:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 16:28:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-07-20 16:28:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 16:28:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2020-07-20 16:28:03,003 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 52 [2020-07-20 16:28:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:03,006 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2020-07-20 16:28:03,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:28:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2020-07-20 16:28:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 16:28:03,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:03,011 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, 1, 1] [2020-07-20 16:28:03,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:03,227 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1378200528, now seen corresponding path program 1 times [2020-07-20 16:28:03,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:03,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066089636] [2020-07-20 16:28:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:03,291 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:03,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:28:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:03,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:03,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066089636] [2020-07-20 16:28:03,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:03,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:28:03,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76243795] [2020-07-20 16:28:03,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:28:03,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:03,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:28:03,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:28:03,338 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand 4 states. [2020-07-20 16:28:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:03,396 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2020-07-20 16:28:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 16:28:03,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-07-20 16:28:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:03,399 INFO L225 Difference]: With dead ends: 113 [2020-07-20 16:28:03,399 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 16:28:03,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:28:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 16:28:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-20 16:28:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 16:28:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-07-20 16:28:03,411 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 55 [2020-07-20 16:28:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:03,411 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-07-20 16:28:03,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:28:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-07-20 16:28:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 16:28:03,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:03,414 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, 1, 1, 1] [2020-07-20 16:28:03,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:03,629 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2077112034, now seen corresponding path program 1 times [2020-07-20 16:28:03,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:03,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642848692] [2020-07-20 16:28:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:03,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:03,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:28:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:03,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:03,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642848692] [2020-07-20 16:28:03,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:03,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:28:03,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774216861] [2020-07-20 16:28:03,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:28:03,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:28:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:28:03,715 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand 4 states. [2020-07-20 16:28:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:03,776 INFO L93 Difference]: Finished difference Result 124 states and 168 transitions. [2020-07-20 16:28:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 16:28:03,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-07-20 16:28:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:03,778 INFO L225 Difference]: With dead ends: 124 [2020-07-20 16:28:03,779 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 16:28:03,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:28:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 16:28:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-20 16:28:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 16:28:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2020-07-20 16:28:03,791 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 56 [2020-07-20 16:28:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:03,791 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2020-07-20 16:28:03,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:28:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2020-07-20 16:28:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 16:28:03,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:03,796 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, 1, 1, 1] [2020-07-20 16:28:04,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:04,000 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1438634270, now seen corresponding path program 1 times [2020-07-20 16:28:04,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:04,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307990626] [2020-07-20 16:28:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:04,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:04,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:04,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 16:28:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 16:28:04,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:04,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307990626] [2020-07-20 16:28:04,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:04,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:28:04,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239744196] [2020-07-20 16:28:04,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:28:04,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:28:04,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:28:04,152 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand 6 states. [2020-07-20 16:28:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:04,213 INFO L93 Difference]: Finished difference Result 106 states and 141 transitions. [2020-07-20 16:28:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:28:04,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-07-20 16:28:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:04,218 INFO L225 Difference]: With dead ends: 106 [2020-07-20 16:28:04,218 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 16:28:04,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:28:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 16:28:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-07-20 16:28:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 16:28:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-07-20 16:28:04,242 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 56 [2020-07-20 16:28:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:04,243 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-07-20 16:28:04,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:28:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-07-20 16:28:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 16:28:04,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:04,246 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, 1, 1, 1] [2020-07-20 16:28:04,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:04,462 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:04,462 INFO L82 PathProgramCache]: Analyzing trace with hash -555510436, now seen corresponding path program 1 times [2020-07-20 16:28:04,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:04,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809932499] [2020-07-20 16:28:04,463 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:04,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 16:28:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:28:04,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:04,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809932499] [2020-07-20 16:28:04,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:28:04,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 16:28:04,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697825784] [2020-07-20 16:28:04,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:28:04,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:28:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:28:04,892 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 11 states. [2020-07-20 16:28:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:05,200 INFO L93 Difference]: Finished difference Result 118 states and 161 transitions. [2020-07-20 16:28:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:28:05,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-07-20 16:28:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:05,203 INFO L225 Difference]: With dead ends: 118 [2020-07-20 16:28:05,203 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 16:28:05,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:28:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 16:28:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2020-07-20 16:28:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 16:28:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 132 transitions. [2020-07-20 16:28:05,232 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 132 transitions. Word has length 56 [2020-07-20 16:28:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:05,232 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 132 transitions. [2020-07-20 16:28:05,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:28:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 132 transitions. [2020-07-20 16:28:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 16:28:05,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:05,234 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, 1, 1, 1] [2020-07-20 16:28:05,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:05,447 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1566627686, now seen corresponding path program 1 times [2020-07-20 16:28:05,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:05,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743982828] [2020-07-20 16:28:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:05,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:05,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:05,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 16:28:05,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:05,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:05,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743982828] [2020-07-20 16:28:05,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:05,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:28:05,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012069890] [2020-07-20 16:28:05,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:28:05,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:28:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:28:05,556 INFO L87 Difference]: Start difference. First operand 94 states and 132 transitions. Second operand 4 states. [2020-07-20 16:28:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:05,642 INFO L93 Difference]: Finished difference Result 183 states and 259 transitions. [2020-07-20 16:28:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:28:05,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-07-20 16:28:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:05,644 INFO L225 Difference]: With dead ends: 183 [2020-07-20 16:28:05,646 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 16:28:05,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:28:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 16:28:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-07-20 16:28:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 16:28:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2020-07-20 16:28:05,673 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 56 [2020-07-20 16:28:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:05,674 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2020-07-20 16:28:05,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:28:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2020-07-20 16:28:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 16:28:05,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:05,676 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, 1, 1, 1, 1] [2020-07-20 16:28:05,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:05,884 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:05,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1588904245, now seen corresponding path program 1 times [2020-07-20 16:28:05,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:05,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638319082] [2020-07-20 16:28:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:05,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 16:28:05,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:05,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:05,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638319082] [2020-07-20 16:28:05,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:05,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:28:05,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8790549] [2020-07-20 16:28:05,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:28:05,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:28:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:28:05,972 INFO L87 Difference]: Start difference. First operand 92 states and 128 transitions. Second operand 5 states. [2020-07-20 16:28:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:06,099 INFO L93 Difference]: Finished difference Result 191 states and 272 transitions. [2020-07-20 16:28:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:28:06,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-07-20 16:28:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:06,105 INFO L225 Difference]: With dead ends: 191 [2020-07-20 16:28:06,106 INFO L226 Difference]: Without dead ends: 109 [2020-07-20 16:28:06,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:28:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-20 16:28:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2020-07-20 16:28:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 16:28:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2020-07-20 16:28:06,129 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 57 [2020-07-20 16:28:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:06,129 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2020-07-20 16:28:06,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:28:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2020-07-20 16:28:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 16:28:06,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:06,131 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, 1, 1, 1, 1] [2020-07-20 16:28:06,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:06,332 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1775343747, now seen corresponding path program 1 times [2020-07-20 16:28:06,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:06,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114862994] [2020-07-20 16:28:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:06,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:06,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:28:06,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:06,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:28:06,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114862994] [2020-07-20 16:28:06,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:06,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 16:28:06,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569042726] [2020-07-20 16:28:06,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:28:06,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:28:06,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:28:06,486 INFO L87 Difference]: Start difference. First operand 93 states and 130 transitions. Second operand 8 states. [2020-07-20 16:28:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:06,581 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2020-07-20 16:28:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:28:06,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-07-20 16:28:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:06,586 INFO L225 Difference]: With dead ends: 202 [2020-07-20 16:28:06,586 INFO L226 Difference]: Without dead ends: 119 [2020-07-20 16:28:06,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:28:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-07-20 16:28:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-07-20 16:28:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 16:28:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2020-07-20 16:28:06,611 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 143 transitions. Word has length 58 [2020-07-20 16:28:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:06,612 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 143 transitions. [2020-07-20 16:28:06,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:28:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 143 transitions. [2020-07-20 16:28:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 16:28:06,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:06,613 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, 1, 1, 1, 1] [2020-07-20 16:28:06,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:06,829 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash 847268444, now seen corresponding path program 1 times [2020-07-20 16:28:06,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:06,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988015155] [2020-07-20 16:28:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:06,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:06,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 16:28:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:06,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:28:07,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988015155] [2020-07-20 16:28:07,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:07,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 16:28:07,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174949636] [2020-07-20 16:28:07,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 16:28:07,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 16:28:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:28:07,020 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. Second operand 10 states. [2020-07-20 16:28:09,289 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 16:28:15,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:15,677 INFO L93 Difference]: Finished difference Result 224 states and 327 transitions. [2020-07-20 16:28:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:28:15,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-07-20 16:28:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:15,679 INFO L225 Difference]: With dead ends: 224 [2020-07-20 16:28:15,679 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 16:28:15,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=80, Invalid=129, Unknown=1, NotChecked=0, Total=210 [2020-07-20 16:28:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 16:28:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2020-07-20 16:28:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 16:28:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 150 transitions. [2020-07-20 16:28:15,692 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 150 transitions. Word has length 60 [2020-07-20 16:28:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:15,693 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 150 transitions. [2020-07-20 16:28:15,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 16:28:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 150 transitions. [2020-07-20 16:28:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 16:28:15,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:15,695 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, 1, 1, 1, 1] [2020-07-20 16:28:15,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:15,895 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:15,896 INFO L82 PathProgramCache]: Analyzing trace with hash -638539668, now seen corresponding path program 2 times [2020-07-20 16:28:15,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:15,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634978606] [2020-07-20 16:28:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:15,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 16:28:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:16,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:28:16,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634978606] [2020-07-20 16:28:16,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:16,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 16:28:16,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777656646] [2020-07-20 16:28:16,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:28:16,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:28:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:28:16,292 INFO L87 Difference]: Start difference. First operand 105 states and 150 transitions. Second operand 14 states. [2020-07-20 16:28:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:16,466 INFO L93 Difference]: Finished difference Result 265 states and 395 transitions. [2020-07-20 16:28:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 16:28:16,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-07-20 16:28:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:16,469 INFO L225 Difference]: With dead ends: 265 [2020-07-20 16:28:16,469 INFO L226 Difference]: Without dead ends: 170 [2020-07-20 16:28:16,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-20 16:28:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 119. [2020-07-20 16:28:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-20 16:28:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 173 transitions. [2020-07-20 16:28:16,492 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 173 transitions. Word has length 67 [2020-07-20 16:28:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:16,492 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 173 transitions. [2020-07-20 16:28:16,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:28:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 173 transitions. [2020-07-20 16:28:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 16:28:16,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:16,494 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, 1, 1, 1, 1] [2020-07-20 16:28:16,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:16,710 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1310112356, now seen corresponding path program 2 times [2020-07-20 16:28:16,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:16,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091625235] [2020-07-20 16:28:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:16,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:16,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:16,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 16:28:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:16,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:28:17,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091625235] [2020-07-20 16:28:17,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:17,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 16:28:17,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285698703] [2020-07-20 16:28:17,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:28:17,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:28:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:28:17,187 INFO L87 Difference]: Start difference. First operand 119 states and 173 transitions. Second operand 18 states. [2020-07-20 16:28:26,052 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 16:28:33,704 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 16:29:01,566 WARN L193 SmtUtils]: Spent 21.26 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 16:29:12,758 WARN L193 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 16:29:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:31,098 INFO L93 Difference]: Finished difference Result 294 states and 443 transitions. [2020-07-20 16:29:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 16:29:31,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-07-20 16:29:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:31,101 INFO L225 Difference]: With dead ends: 294 [2020-07-20 16:29:31,101 INFO L226 Difference]: Without dead ends: 185 [2020-07-20 16:29:31,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=312, Invalid=605, Unknown=13, NotChecked=0, Total=930 [2020-07-20 16:29:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-20 16:29:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 129. [2020-07-20 16:29:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 16:29:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 190 transitions. [2020-07-20 16:29:31,118 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 190 transitions. Word has length 72 [2020-07-20 16:29:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:31,119 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 190 transitions. [2020-07-20 16:29:31,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:29:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 190 transitions. [2020-07-20 16:29:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 16:29:31,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:31,120 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, 1, 1, 1, 1] [2020-07-20 16:29:31,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:31,335 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:31,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1326090124, now seen corresponding path program 3 times [2020-07-20 16:29:31,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:31,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050372732] [2020-07-20 16:29:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:31,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:31,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:31,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:29:31,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:29:31,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:29:32,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050372732] [2020-07-20 16:29:32,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:32,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 16:29:32,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580768884] [2020-07-20 16:29:32,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 16:29:32,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:32,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 16:29:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:29:32,047 INFO L87 Difference]: Start difference. First operand 129 states and 190 transitions. Second operand 26 states. [2020-07-20 16:29:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:32,416 INFO L93 Difference]: Finished difference Result 391 states and 601 transitions. [2020-07-20 16:29:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 16:29:32,417 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-07-20 16:29:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:32,421 INFO L225 Difference]: With dead ends: 391 [2020-07-20 16:29:32,421 INFO L226 Difference]: Without dead ends: 272 [2020-07-20 16:29:32,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:29:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-20 16:29:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 155. [2020-07-20 16:29:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-20 16:29:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 233 transitions. [2020-07-20 16:29:32,444 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 233 transitions. Word has length 85 [2020-07-20 16:29:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:32,445 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 233 transitions. [2020-07-20 16:29:32,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 16:29:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 233 transitions. [2020-07-20 16:29:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 16:29:32,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:32,447 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, 1, 1, 1, 1] [2020-07-20 16:29:32,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:32,660 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:32,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1670472676, now seen corresponding path program 3 times [2020-07-20 16:29:32,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:32,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279554906] [2020-07-20 16:29:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:32,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:29:32,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:32,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 16:29:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:29:33,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 278 refuted. 3 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:29:36,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279554906] [2020-07-20 16:29:36,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:36,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-20 16:29:36,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487622324] [2020-07-20 16:29:36,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 16:29:36,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 16:29:36,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=815, Unknown=1, NotChecked=0, Total=1122 [2020-07-20 16:29:36,020 INFO L87 Difference]: Start difference. First operand 155 states and 233 transitions. Second operand 34 states. [2020-07-20 16:29:52,799 WARN L193 SmtUtils]: Spent 7.05 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-20 16:30:25,687 WARN L193 SmtUtils]: Spent 16.77 s on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2020-07-20 16:30:52,881 WARN L193 SmtUtils]: Spent 20.81 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 16:31:20,238 WARN L193 SmtUtils]: Spent 11.97 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 16:31:49,567 WARN L193 SmtUtils]: Spent 14.64 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 16:32:13,032 WARN L193 SmtUtils]: Spent 12.50 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:32:32,037 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 16:32:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:40,110 INFO L93 Difference]: Finished difference Result 398 states and 609 transitions. [2020-07-20 16:32:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 16:32:40,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 96 [2020-07-20 16:32:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:40,123 INFO L225 Difference]: With dead ends: 398 [2020-07-20 16:32:40,124 INFO L226 Difference]: Without dead ends: 253 [2020-07-20 16:32:40,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 180.1s TimeCoverageRelationStatistics Valid=929, Invalid=2230, Unknown=33, NotChecked=0, Total=3192 [2020-07-20 16:32:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-20 16:32:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 159. [2020-07-20 16:32:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-20 16:32:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 240 transitions. [2020-07-20 16:32:40,161 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 240 transitions. Word has length 96 [2020-07-20 16:32:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:40,162 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 240 transitions. [2020-07-20 16:32:40,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 16:32:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 240 transitions. [2020-07-20 16:32:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 16:32:40,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:40,166 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, 1, 1, 1, 1] [2020-07-20 16:32:40,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:40,381 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1931980236, now seen corresponding path program 4 times [2020-07-20 16:32:40,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:40,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842874879] [2020-07-20 16:32:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:40,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:40,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:40,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 16:32:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:32:41,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:32:43,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842874879] [2020-07-20 16:32:43,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:32:43,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 16:32:43,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443597180] [2020-07-20 16:32:43,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 16:32:43,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:43,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 16:32:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 16:32:43,465 INFO L87 Difference]: Start difference. First operand 159 states and 240 transitions. Second operand 50 states. [2020-07-20 16:32:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:45,295 INFO L93 Difference]: Finished difference Result 625 states and 989 transitions. [2020-07-20 16:32:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 16:32:45,297 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 121 [2020-07-20 16:32:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:45,305 INFO L225 Difference]: With dead ends: 625 [2020-07-20 16:32:45,305 INFO L226 Difference]: Without dead ends: 476 [2020-07-20 16:32:45,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 16:32:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-07-20 16:32:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 227. [2020-07-20 16:32:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-20 16:32:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 353 transitions. [2020-07-20 16:32:45,367 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 353 transitions. Word has length 121 [2020-07-20 16:32:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:45,368 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 353 transitions. [2020-07-20 16:32:45,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 16:32:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 353 transitions. [2020-07-20 16:32:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 16:32:45,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:45,371 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:45,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:45,586 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:45,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 4 times [2020-07-20 16:32:45,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:45,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928289774] [2020-07-20 16:32:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:45,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:32:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 16:32:45,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 16:32:45,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:32:45,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928289774] [2020-07-20 16:32:45,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:32:45,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:32:45,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098525989] [2020-07-20 16:32:45,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:32:45,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:45,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:32:45,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:32:45,744 INFO L87 Difference]: Start difference. First operand 227 states and 353 transitions. Second operand 6 states. [2020-07-20 16:32:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:45,809 INFO L93 Difference]: Finished difference Result 233 states and 358 transitions. [2020-07-20 16:32:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:32:45,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 16:32:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:45,813 INFO L225 Difference]: With dead ends: 233 [2020-07-20 16:32:45,813 INFO L226 Difference]: Without dead ends: 227 [2020-07-20 16:32:45,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:32:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-20 16:32:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-07-20 16:32:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-20 16:32:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 352 transitions. [2020-07-20 16:32:45,834 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 352 transitions. Word has length 126 [2020-07-20 16:32:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:45,835 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 352 transitions. [2020-07-20 16:32:45,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:32:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 352 transitions. [2020-07-20 16:32:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 16:32:45,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:45,838 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:46,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:46,051 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-20 16:32:46,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:46,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002453778] [2020-07-20 16:32:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:46,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:46,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 16:32:46,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 16:32:46,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:32:46,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002453778] [2020-07-20 16:32:46,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:32:46,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:32:46,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308966042] [2020-07-20 16:32:46,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:32:46,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:46,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:32:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:32:46,177 INFO L87 Difference]: Start difference. First operand 227 states and 352 transitions. Second operand 6 states. [2020-07-20 16:32:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:46,229 INFO L93 Difference]: Finished difference Result 243 states and 368 transitions. [2020-07-20 16:32:46,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:32:46,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 16:32:46,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:46,233 INFO L225 Difference]: With dead ends: 243 [2020-07-20 16:32:46,233 INFO L226 Difference]: Without dead ends: 227 [2020-07-20 16:32:46,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:32:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-20 16:32:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-07-20 16:32:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-20 16:32:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 348 transitions. [2020-07-20 16:32:46,252 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 348 transitions. Word has length 126 [2020-07-20 16:32:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:46,252 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 348 transitions. [2020-07-20 16:32:46,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:32:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 348 transitions. [2020-07-20 16:32:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 16:32:46,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:46,255 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, 1] [2020-07-20 16:32:46,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:46,470 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-07-20 16:32:46,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:46,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377452550] [2020-07-20 16:32:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:46,540 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:32:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 16:32:46,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:46,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377452550] [2020-07-20 16:32:46,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:32:46,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 16:32:46,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257172879] [2020-07-20 16:32:46,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:32:46,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:46,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:32:46,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:32:46,837 INFO L87 Difference]: Start difference. First operand 227 states and 348 transitions. Second operand 9 states. [2020-07-20 16:32:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:47,220 INFO L93 Difference]: Finished difference Result 239 states and 361 transitions. [2020-07-20 16:32:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:32:47,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2020-07-20 16:32:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:47,225 INFO L225 Difference]: With dead ends: 239 [2020-07-20 16:32:47,226 INFO L226 Difference]: Without dead ends: 217 [2020-07-20 16:32:47,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:32:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-20 16:32:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 207. [2020-07-20 16:32:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-20 16:32:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 314 transitions. [2020-07-20 16:32:47,256 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 314 transitions. Word has length 127 [2020-07-20 16:32:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:47,256 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 314 transitions. [2020-07-20 16:32:47,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:32:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 314 transitions. [2020-07-20 16:32:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-20 16:32:47,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:47,261 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:47,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:47,475 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:47,476 INFO L82 PathProgramCache]: Analyzing trace with hash -412015497, now seen corresponding path program 1 times [2020-07-20 16:32:47,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:47,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7162761] [2020-07-20 16:32:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:47,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:47,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:32:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:49,730 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_mulflt_~b_42 Int)) (< (mod |c_mulflt_#in~a| 4294967296) (mod v_mulflt_~b_42 4294967296))) is different from true [2020-07-20 16:32:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 16:32:49,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:51,951 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_mulflt_~b_47 Int)) (<= (mod v_mulflt_~b_47 4294967296) (mod c_main_~a~0 4294967296))) is different from false [2020-07-20 16:32:51,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7162761] [2020-07-20 16:32:51,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:32:51,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 16:32:51,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058532844] [2020-07-20 16:32:51,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:32:51,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:51,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:32:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=33, Unknown=2, NotChecked=22, Total=72 [2020-07-20 16:32:51,959 INFO L87 Difference]: Start difference. First operand 207 states and 314 transitions. Second operand 8 states. [2020-07-20 16:32:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:52,142 INFO L93 Difference]: Finished difference Result 249 states and 370 transitions. [2020-07-20 16:32:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:32:52,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-07-20 16:32:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:52,146 INFO L225 Difference]: With dead ends: 249 [2020-07-20 16:32:52,147 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 16:32:52,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=19, Invalid=43, Unknown=2, NotChecked=26, Total=90 [2020-07-20 16:32:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 16:32:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 225. [2020-07-20 16:32:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 16:32:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 342 transitions. [2020-07-20 16:32:52,174 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 342 transitions. Word has length 131 [2020-07-20 16:32:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:52,175 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 342 transitions. [2020-07-20 16:32:52,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:32:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 342 transitions. [2020-07-20 16:32:52,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-20 16:32:52,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:52,179 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:52,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:52,394 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:52,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1691879175, now seen corresponding path program 1 times [2020-07-20 16:32:52,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:52,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49404214] [2020-07-20 16:32:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:52,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:32:52,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 16:32:52,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:32:52,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49404214] [2020-07-20 16:32:52,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:32:52,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 16:32:52,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210804555] [2020-07-20 16:32:52,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:32:52,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:52,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:32:52,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:32:52,588 INFO L87 Difference]: Start difference. First operand 225 states and 342 transitions. Second operand 8 states. [2020-07-20 16:32:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:52,787 INFO L93 Difference]: Finished difference Result 247 states and 372 transitions. [2020-07-20 16:32:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:32:52,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-07-20 16:32:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:52,791 INFO L225 Difference]: With dead ends: 247 [2020-07-20 16:32:52,791 INFO L226 Difference]: Without dead ends: 224 [2020-07-20 16:32:52,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:32:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-20 16:32:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2020-07-20 16:32:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-20 16:32:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 282 transitions. [2020-07-20 16:32:52,809 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 282 transitions. Word has length 131 [2020-07-20 16:32:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:52,809 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 282 transitions. [2020-07-20 16:32:52,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:32:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 282 transitions. [2020-07-20 16:32:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 16:32:52,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:52,812 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:53,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:53,028 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1613851048, now seen corresponding path program 1 times [2020-07-20 16:32:53,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:53,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891436579] [2020-07-20 16:32:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:53,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:32:53,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:53,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:32:53,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-07-20 16:32:53,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:32:53,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891436579] [2020-07-20 16:32:53,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:32:53,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:32:53,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740510709] [2020-07-20 16:32:53,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:32:53,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:53,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:32:53,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:32:53,185 INFO L87 Difference]: Start difference. First operand 216 states and 282 transitions. Second operand 4 states. [2020-07-20 16:32:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:53,222 INFO L93 Difference]: Finished difference Result 230 states and 298 transitions. [2020-07-20 16:32:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 16:32:53,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-07-20 16:32:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:53,225 INFO L225 Difference]: With dead ends: 230 [2020-07-20 16:32:53,225 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 16:32:53,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:32:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 16:32:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-07-20 16:32:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-20 16:32:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 280 transitions. [2020-07-20 16:32:53,242 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 280 transitions. Word has length 135 [2020-07-20 16:32:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:53,243 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 280 transitions. [2020-07-20 16:32:53,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:32:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 280 transitions. [2020-07-20 16:32:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 16:32:53,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:53,246 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:53,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:53,460 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:53,460 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-07-20 16:32:53,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:53,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808326864] [2020-07-20 16:32:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:53,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:53,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:32:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 16:32:53,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:32:53,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808326864] [2020-07-20 16:32:53,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:32:53,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 16:32:53,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953604456] [2020-07-20 16:32:53,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 16:32:53,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 16:32:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:32:53,669 INFO L87 Difference]: Start difference. First operand 216 states and 280 transitions. Second operand 7 states. [2020-07-20 16:32:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:53,852 INFO L93 Difference]: Finished difference Result 236 states and 302 transitions. [2020-07-20 16:32:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:32:53,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-07-20 16:32:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:53,859 INFO L225 Difference]: With dead ends: 236 [2020-07-20 16:32:53,859 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 16:32:53,860 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 [2020-07-20 16:32:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 16:32:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-07-20 16:32:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-20 16:32:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 278 transitions. [2020-07-20 16:32:53,882 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 278 transitions. Word has length 135 [2020-07-20 16:32:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:53,883 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 278 transitions. [2020-07-20 16:32:53,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 16:32:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 278 transitions. [2020-07-20 16:32:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 16:32:53,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:53,885 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:54,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:54,099 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-20 16:32:54,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:54,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949949290] [2020-07-20 16:32:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:54,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:54,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:54,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:32:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 16:32:54,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:54,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949949290] [2020-07-20 16:32:54,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:32:54,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 16:32:54,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418536102] [2020-07-20 16:32:54,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:32:54,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:32:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:32:54,589 INFO L87 Difference]: Start difference. First operand 216 states and 278 transitions. Second operand 9 states. [2020-07-20 16:32:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:54,813 INFO L93 Difference]: Finished difference Result 224 states and 290 transitions. [2020-07-20 16:32:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:32:54,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-20 16:32:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:54,814 INFO L225 Difference]: With dead ends: 224 [2020-07-20 16:32:54,814 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:32:54,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:32:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:32:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:32:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:32:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:32:54,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-20 16:32:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:54,817 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:32:54,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:32:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:32:54,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:32:55,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:55,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:32:55,633 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 356 [2020-07-20 16:32:55,749 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 356 [2020-07-20 16:32:55,860 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 356 [2020-07-20 16:32:56,028 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 356 [2020-07-20 16:32:56,148 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 356 [2020-07-20 16:32:56,399 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2020-07-20 16:33:04,289 WARN L193 SmtUtils]: Spent 7.87 s on a formula simplification. DAG size of input: 374 DAG size of output: 41 [2020-07-20 16:33:05,281 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 20 [2020-07-20 16:33:05,294 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:33:05,294 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:33:05,295 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-20 16:33:05,295 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-20 16:33:05,295 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-20 16:33:05,295 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-20 16:33:05,295 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-20 16:33:05,295 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-20 16:33:05,296 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)) (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-20 16:33:05,296 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-20 16:33:05,296 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-20 16:33:05,296 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-20 16:33:05,296 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-20 16:33:05,296 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-20 16:33:05,296 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-20 16:33:05,297 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= mulflt_~a |mulflt_#in~a|)) (.cse2 (= mulflt_~b |mulflt_#in~b|)) (.cse4 (= 0 mulflt_~__retres10~1)) (.cse3 (< (mod |mulflt_#in~a| 4294967296) (mod |mulflt_#in~b| 4294967296)))) (or (and (let ((.cse0 (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)))) (or (and .cse0 .cse1 .cse2) (and .cse0 (exists ((mulflt_~b Int)) (and (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)) (not (= 0 (mod mulflt_~b 4294967296))))) .cse3))) (not (= 0 (mod |mulflt_#in~b| 4294967296)))) (and .cse1 .cse2 .cse4) (and .cse4 .cse3))) [2020-07-20 16:33:05,297 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:33:05,298 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-20 16:33:05,298 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-20 16:33:05,299 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-20 16:33:05,299 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 16:33:05,299 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-20 16:33:05,299 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-20 16:33:05,299 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-20 16:33:05,299 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-20 16:33:05,299 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-20 16:33:05,299 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~zero~0) (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-20 16:33:05,300 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-20 16:33:05,300 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 16:33:05,300 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (= 0 main_~a~0)) (and .cse0 (<= (mod main_~b~0 4294967296) 0)) (and .cse0 (<= 1 main_~tmp~2) (<= 1 main_~sb~0)))) [2020-07-20 16:33:05,300 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-20 16:33:05,300 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 16:33:05,300 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-20 16:33:05,300 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-20 16:33:05,300 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-20 16:33:05,300 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 16:33:05,300 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-20 16:33:05,300 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-20 16:33:05,301 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-20 16:33:05,302 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-20 16:33:05,302 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-20 16:33:05,302 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-20 16:33:05,302 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-20 16:33:05,324 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 16:33:05,326 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 16:33:05,328 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 16:33:05,328 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 16:33:05,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:33:05 BoogieIcfgContainer [2020-07-20 16:33:05,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:33:05,334 INFO L168 Benchmark]: Toolchain (without parser) took 304475.32 ms. Allocated memory was 138.4 MB in the beginning and 245.9 MB in the end (delta: 107.5 MB). Free memory was 102.6 MB in the beginning and 142.1 MB in the end (delta: -39.5 MB). Peak memory consumption was 138.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,335 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 422.87 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 102.2 MB in the beginning and 179.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,336 INFO L168 Benchmark]: Boogie Preprocessor took 43.28 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 177.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,336 INFO L168 Benchmark]: RCFGBuilder took 562.92 ms. Allocated memory is still 201.9 MB. Free memory was 177.1 MB in the beginning and 152.0 MB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,337 INFO L168 Benchmark]: TraceAbstraction took 303440.72 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 151.3 MB in the beginning and 142.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 123.7 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,339 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 422.87 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 102.2 MB in the beginning and 179.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.28 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 177.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 562.92 ms. Allocated memory is still 201.9 MB. Free memory was 177.1 MB in the beginning and 152.0 MB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 303440.72 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 151.3 MB in the beginning and 142.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 123.7 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[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-20 16:33:05,346 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 16:33:05,346 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 16:33:05,347 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 16:33:05,347 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] Derived loop invariant: (((((b % 4294967296 <= \old(a) % 4294967296 && a == \old(a)) && b == \old(b)) || ((b % 4294967296 <= \old(a) % 4294967296 && (\exists mulflt_~b : int :: mulflt_~b % 4294967296 <= \old(a) % 4294967296 && !(0 == mulflt_~b % 4294967296))) && \old(a) % 4294967296 < \old(b) % 4294967296)) && !(0 == \old(b) % 4294967296)) || ((a == \old(a) && b == \old(b)) && 0 == __retres10)) || (0 == __retres10 && \old(a) % 4294967296 < \old(b) % 4294967296) - 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) && !(\old(m) % 4294967296 <= 0)) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 293.0s, OverallIterations: 23, TraceHistogramMax: 24, AutomataDifference: 271.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1624 SDtfs, 3098 SDslu, 7689 SDs, 0 SdLazy, 3491 SolverSat, 511 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 18.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2827 GetRequests, 2485 SyntacticMatches, 12 SemanticMatches, 330 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 262.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=227occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 23 MinimizatonAttempts, 719 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 331 PreInvPairs, 917 NumberOfFragments, 183 HoareAnnotationTreeSize, 331 FomulaSimplifications, 9938 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 11714 FormulaSimplificationTreeSizeReductionInter, 9.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 14.1s InterpolantComputationTime, 2041 NumberOfCodeBlocks, 1344 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2570 ConstructedInterpolants, 9 QuantifiedInterpolants, 556252 SizeOfPredicates, 49 NumberOfNonLiveVariables, 4446 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 30 InterpolantComputations, 11 PerfectInterpolantSequences, 7455/10026 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...