/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:31:19,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:19,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:19,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:31:19,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:19,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:19,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:19,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:19,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:19,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:19,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:19,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:19,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:19,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:19,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:19,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:19,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:19,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:19,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:19,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:19,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:19,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:19,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:19,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:19,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:19,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:31:19,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:31:19,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:31:19,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:31:19,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:19,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:19,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:19,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:19,499 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:19,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:19,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:19,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:19,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:19,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:19,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:19,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:19,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:19,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:19,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:19,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:19,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:19,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:19,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:19,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:19,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:19,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:19,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:19,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:19,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:19,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:19,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:19,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:19,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:19,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:31:19,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:19,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:19,776 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:19,777 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:19,777 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:19,778 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 00:31:19,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2786f3ce4/cb488120c3764b5db8c3f0cabac71e00/FLAGa260d2f94 [2020-07-21 00:31:20,368 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:20,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 00:31:20,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2786f3ce4/cb488120c3764b5db8c3f0cabac71e00/FLAGa260d2f94 [2020-07-21 00:31:20,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2786f3ce4/cb488120c3764b5db8c3f0cabac71e00 [2020-07-21 00:31:20,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:20,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:20,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:20,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:20,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:20,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:20" (1/1) ... [2020-07-21 00:31:20,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158c267f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:20, skipping insertion in model container [2020-07-21 00:31:20,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:20" (1/1) ... [2020-07-21 00:31:20,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:20,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:21,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:21,042 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:21,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:21,184 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:21,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21 WrapperNode [2020-07-21 00:31:21,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:21,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:21,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:21,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:21,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... [2020-07-21 00:31:21,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... [2020-07-21 00:31:21,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... [2020-07-21 00:31:21,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... [2020-07-21 00:31:21,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... [2020-07-21 00:31:21,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... [2020-07-21 00:31:21,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... [2020-07-21 00:31:21,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:21,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:21,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:21,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:21,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:21,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:21,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:21,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 00:31:21,306 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 00:31:21,307 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 00:31:21,307 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 00:31:21,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 00:31:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 00:31:21,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 00:31:21,308 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 00:31:21,308 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 00:31:21,308 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 00:31:21,308 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:21,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:21,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:21,751 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:21,752 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 00:31:21,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:21 BoogieIcfgContainer [2020-07-21 00:31:21,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:21,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:21,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:21,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:21,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:20" (1/3) ... [2020-07-21 00:31:21,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e06c752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:21, skipping insertion in model container [2020-07-21 00:31:21,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:21" (2/3) ... [2020-07-21 00:31:21,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e06c752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:21, skipping insertion in model container [2020-07-21 00:31:21,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:21" (3/3) ... [2020-07-21 00:31:21,763 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-21 00:31:21,773 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:21,781 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:21,792 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:21,816 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:21,816 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:21,816 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:21,816 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:21,816 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:21,816 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:21,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:21,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 00:31:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 00:31:21,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:21,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:21,843 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:21,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:21,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 00:31:21,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:21,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078799264] [2020-07-21 00:31:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,953 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:21,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 00:31:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:22,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:22,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078799264] [2020-07-21 00:31:22,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:22,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:22,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937625906] [2020-07-21 00:31:22,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:22,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:22,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:22,059 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-21 00:31:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:22,202 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-21 00:31:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:22,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-21 00:31:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:22,217 INFO L225 Difference]: With dead ends: 126 [2020-07-21 00:31:22,217 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 00:31:22,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 00:31:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-21 00:31:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 00:31:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-21 00:31:22,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-21 00:31:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:22,280 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-21 00:31:22,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-21 00:31:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 00:31:22,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:22,287 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:22,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:22,502 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-21 00:31:22,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:22,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728512917] [2020-07-21 00:31:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:22,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:22,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 00:31:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:22,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:22,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728512917] [2020-07-21 00:31:22,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:22,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:22,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126362862] [2020-07-21 00:31:22,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:22,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:22,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:22,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:22,642 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-21 00:31:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:22,736 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-21 00:31:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 00:31:22,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-21 00:31:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:22,740 INFO L225 Difference]: With dead ends: 113 [2020-07-21 00:31:22,740 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 00:31:22,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 00:31:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-21 00:31:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 00:31:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-21 00:31:22,783 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-21 00:31:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:22,784 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-21 00:31:22,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-21 00:31:22,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:31:22,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:22,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:22,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:22,994 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-21 00:31:22,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:22,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804066519] [2020-07-21 00:31:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:23,049 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:23,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:23,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 00:31:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:23,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:23,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804066519] [2020-07-21 00:31:23,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:23,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:23,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839773249] [2020-07-21 00:31:23,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:23,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:23,085 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-21 00:31:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:23,155 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-21 00:31:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 00:31:23,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 00:31:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:23,157 INFO L225 Difference]: With dead ends: 124 [2020-07-21 00:31:23,157 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:31:23,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:31:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-21 00:31:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:31:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-21 00:31:23,170 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-21 00:31:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:23,171 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-21 00:31:23,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-21 00:31:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:31:23,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:23,173 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:23,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:23,388 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-21 00:31:23,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:23,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322758008] [2020-07-21 00:31:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:23,435 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:23,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:23,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 00:31:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:23,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:23,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322758008] [2020-07-21 00:31:23,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:23,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:31:23,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795893041] [2020-07-21 00:31:23,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:31:23,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:31:23,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:31:23,474 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-21 00:31:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:23,575 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-21 00:31:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:23,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 00:31:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:23,579 INFO L225 Difference]: With dead ends: 128 [2020-07-21 00:31:23,579 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 00:31:23,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 00:31:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-21 00:31:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 00:31:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-21 00:31:23,598 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-21 00:31:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:23,601 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-21 00:31:23,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:31:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-21 00:31:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 00:31:23,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:23,607 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:23,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:23,825 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:23,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-21 00:31:23,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:23,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909723211] [2020-07-21 00:31:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:23,880 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:23,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:23,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:23,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909723211] [2020-07-21 00:31:23,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:23,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:23,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614023678] [2020-07-21 00:31:23,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:23,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:23,912 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-21 00:31:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:24,034 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-21 00:31:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:31:24,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-21 00:31:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:24,038 INFO L225 Difference]: With dead ends: 133 [2020-07-21 00:31:24,038 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 00:31:24,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 00:31:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-21 00:31:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 00:31:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-21 00:31:24,050 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-21 00:31:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:24,050 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-21 00:31:24,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-21 00:31:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:31:24,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:24,052 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:24,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,260 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-21 00:31:24,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:24,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75881637] [2020-07-21 00:31:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,305 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:24,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:24,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75881637] [2020-07-21 00:31:24,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:24,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 00:31:24,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871207875] [2020-07-21 00:31:24,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:31:24,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:24,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:31:24,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:31:24,453 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-21 00:31:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:24,575 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-21 00:31:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:31:24,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-21 00:31:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:24,577 INFO L225 Difference]: With dead ends: 147 [2020-07-21 00:31:24,578 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:31:24,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:31:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-21 00:31:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 00:31:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-21 00:31:24,610 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-21 00:31:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:24,611 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-21 00:31:24,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:31:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-21 00:31:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 00:31:24,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:24,614 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:24,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,828 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-21 00:31:24,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:24,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815121608] [2020-07-21 00:31:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,877 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:31:24,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:24,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:25,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815121608] [2020-07-21 00:31:25,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:25,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 00:31:25,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735755067] [2020-07-21 00:31:25,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:31:25,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:31:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:25,083 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-21 00:31:27,377 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 00:31:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:29,624 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-21 00:31:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:31:29,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-21 00:31:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:29,626 INFO L225 Difference]: With dead ends: 172 [2020-07-21 00:31:29,627 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 00:31:29,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=80, Invalid=129, Unknown=1, NotChecked=0, Total=210 [2020-07-21 00:31:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 00:31:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-21 00:31:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 00:31:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-21 00:31:29,640 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-21 00:31:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:29,641 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-21 00:31:29,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:31:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-21 00:31:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-21 00:31:29,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:29,643 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:29,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:29,856 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-21 00:31:29,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:29,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61057176] [2020-07-21 00:31:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:29,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:29,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:29,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:29,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:30,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61057176] [2020-07-21 00:31:30,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:30,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 00:31:30,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618321693] [2020-07-21 00:31:30,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:31:30,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:31:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:31:30,168 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-21 00:31:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:30,371 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-21 00:31:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 00:31:30,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-21 00:31:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:30,379 INFO L225 Difference]: With dead ends: 210 [2020-07-21 00:31:30,379 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 00:31:30,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:31:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 00:31:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-21 00:31:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 00:31:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-21 00:31:30,415 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-21 00:31:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:30,419 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-21 00:31:30,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:31:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-21 00:31:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 00:31:30,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:30,422 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:30,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:30,636 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-21 00:31:30,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:30,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741569934] [2020-07-21 00:31:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:30,677 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:30,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:31:30,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:31:30,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:31,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741569934] [2020-07-21 00:31:31,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:31,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 00:31:31,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021518532] [2020-07-21 00:31:31,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:31:31,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:31:31,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:31:31,107 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-21 00:31:35,893 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 00:31:44,454 WARN L193 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 00:32:13,642 WARN L193 SmtUtils]: Spent 24.80 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 00:32:26,432 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 00:32:36,935 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 00:32:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:43,626 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-21 00:32:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 00:32:43,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-21 00:32:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:43,629 INFO L225 Difference]: With dead ends: 242 [2020-07-21 00:32:43,630 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 00:32:43,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 70.0s TimeCoverageRelationStatistics Valid=314, Invalid=605, Unknown=11, NotChecked=0, Total=930 [2020-07-21 00:32:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 00:32:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-21 00:32:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-21 00:32:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-21 00:32:43,660 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-21 00:32:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:43,661 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-21 00:32:43,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:32:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-21 00:32:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 00:32:43,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:43,664 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:43,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:43,878 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-21 00:32:43,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:43,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041145918] [2020-07-21 00:32:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:43,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:32:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:32:44,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:32:44,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041145918] [2020-07-21 00:32:44,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:44,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 00:32:44,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721280559] [2020-07-21 00:32:44,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 00:32:44,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:44,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 00:32:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:32:44,597 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-21 00:32:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:45,004 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-21 00:32:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 00:32:45,005 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-21 00:32:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:45,008 INFO L225 Difference]: With dead ends: 336 [2020-07-21 00:32:45,008 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 00:32:45,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 00:32:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 00:32:45,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-21 00:32:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-21 00:32:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-21 00:32:45,027 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-21 00:32:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:45,027 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-21 00:32:45,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 00:32:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-21 00:32:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 00:32:45,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:45,029 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:45,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:45,245 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:45,246 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-21 00:32:45,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:45,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194357318] [2020-07-21 00:32:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:45,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:45,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 00:32:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:32:45,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:32:46,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194357318] [2020-07-21 00:32:46,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:46,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 00:32:46,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560922607] [2020-07-21 00:32:46,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 00:32:46,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 00:32:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 00:32:46,534 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-21 00:33:15,958 WARN L193 SmtUtils]: Spent 20.86 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 00:33:35,498 WARN L193 SmtUtils]: Spent 8.48 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 00:34:05,137 WARN L193 SmtUtils]: Spent 14.77 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 00:34:23,058 WARN L193 SmtUtils]: Spent 8.76 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 00:34:52,299 WARN L193 SmtUtils]: Spent 10.42 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 00:35:02,360 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 00:35:17,265 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 00:35:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:33,056 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-21 00:35:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 00:35:33,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-21 00:35:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:33,060 INFO L225 Difference]: With dead ends: 346 [2020-07-21 00:35:33,061 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 00:35:33,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 154.9s TimeCoverageRelationStatistics Valid=918, Invalid=2239, Unknown=35, NotChecked=0, Total=3192 [2020-07-21 00:35:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 00:35:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-21 00:35:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 00:35:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-21 00:35:33,082 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-21 00:35:33,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:33,084 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-21 00:35:33,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 00:35:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-21 00:35:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 00:35:33,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:33,086 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:33,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:33,300 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-21 00:35:33,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:33,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18882427] [2020-07-21 00:35:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:33,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:35:33,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:33,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 00:35:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:35:33,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:35:35,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18882427] [2020-07-21 00:35:35,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:35,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 00:35:35,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882524158] [2020-07-21 00:35:35,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 00:35:35,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:35,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 00:35:35,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 00:35:35,767 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-21 00:35:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:37,044 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-21 00:35:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 00:35:37,045 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-21 00:35:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:37,049 INFO L225 Difference]: With dead ends: 570 [2020-07-21 00:35:37,049 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 00:35:37,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 00:35:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 00:35:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-21 00:35:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 00:35:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-21 00:35:37,086 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-21 00:35:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:37,087 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-21 00:35:37,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 00:35:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-21 00:35:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 00:35:37,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:37,089 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:37,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:37,305 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-21 00:35:37,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:37,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94513744] [2020-07-21 00:35:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:37,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:37,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 00:35:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:35:37,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:37,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94513744] [2020-07-21 00:35:37,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:37,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 00:35:37,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552740227] [2020-07-21 00:35:37,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 00:35:37,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:37,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 00:35:37,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 00:35:37,423 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 3 states. [2020-07-21 00:35:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:37,443 INFO L93 Difference]: Finished difference Result 209 states and 323 transitions. [2020-07-21 00:35:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 00:35:37,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-07-21 00:35:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:37,446 INFO L225 Difference]: With dead ends: 209 [2020-07-21 00:35:37,446 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:35:37,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 00:35:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:35:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 00:35:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 00:35:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 309 transitions. [2020-07-21 00:35:37,466 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 309 transitions. Word has length 122 [2020-07-21 00:35:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:37,466 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 309 transitions. [2020-07-21 00:35:37,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 00:35:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 309 transitions. [2020-07-21 00:35:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 00:35:37,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:37,469 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:37,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:37,682 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1044966756, now seen corresponding path program 1 times [2020-07-21 00:35:37,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:37,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660462776] [2020-07-21 00:35:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:37,776 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 00:35:37,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:35:37,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:37,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660462776] [2020-07-21 00:35:37,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:37,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 00:35:37,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777577641] [2020-07-21 00:35:37,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 00:35:37,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:37,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 00:35:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 00:35:37,804 INFO L87 Difference]: Start difference. First operand 198 states and 309 transitions. Second operand 4 states. [2020-07-21 00:35:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:37,829 INFO L93 Difference]: Finished difference Result 210 states and 323 transitions. [2020-07-21 00:35:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 00:35:37,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-07-21 00:35:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:37,835 INFO L225 Difference]: With dead ends: 210 [2020-07-21 00:35:37,835 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:35:37,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:35:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:35:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 00:35:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 00:35:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-21 00:35:37,853 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 124 [2020-07-21 00:35:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:37,854 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-21 00:35:37,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 00:35:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-21 00:35:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 00:35:37,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:37,856 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:38,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:38,065 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:38,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 1 times [2020-07-21 00:35:38,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:38,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027884501] [2020-07-21 00:35:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:38,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:38,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:38,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:35:38,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 00:35:38,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:38,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027884501] [2020-07-21 00:35:38,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:35:38,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 00:35:38,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983491389] [2020-07-21 00:35:38,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:35:38,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:35:38,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:35:38,420 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 9 states. [2020-07-21 00:35:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:38,561 INFO L93 Difference]: Finished difference Result 232 states and 359 transitions. [2020-07-21 00:35:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:35:38,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2020-07-21 00:35:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:38,565 INFO L225 Difference]: With dead ends: 232 [2020-07-21 00:35:38,565 INFO L226 Difference]: Without dead ends: 227 [2020-07-21 00:35:38,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:35:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-21 00:35:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 214. [2020-07-21 00:35:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-21 00:35:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 333 transitions. [2020-07-21 00:35:38,582 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 333 transitions. Word has length 124 [2020-07-21 00:35:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:38,583 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 333 transitions. [2020-07-21 00:35:38,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:35:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 333 transitions. [2020-07-21 00:35:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 00:35:38,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:38,585 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:38,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:38,799 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572994, now seen corresponding path program 1 times [2020-07-21 00:35:38,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:38,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439967052] [2020-07-21 00:35:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:38,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:38,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:35:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:35:38,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:38,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439967052] [2020-07-21 00:35:38,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:38,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:35:38,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730711001] [2020-07-21 00:35:38,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:35:38,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:38,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:35:38,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:35:38,946 INFO L87 Difference]: Start difference. First operand 214 states and 333 transitions. Second operand 6 states. [2020-07-21 00:35:38,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:38,999 INFO L93 Difference]: Finished difference Result 220 states and 338 transitions. [2020-07-21 00:35:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:35:39,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 00:35:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:39,002 INFO L225 Difference]: With dead ends: 220 [2020-07-21 00:35:39,003 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 00:35:39,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:35:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 00:35:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-07-21 00:35:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-21 00:35:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 332 transitions. [2020-07-21 00:35:39,020 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 332 transitions. Word has length 126 [2020-07-21 00:35:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:39,020 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 332 transitions. [2020-07-21 00:35:39,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:35:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 332 transitions. [2020-07-21 00:35:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 00:35:39,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:39,023 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:39,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:39,238 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1476831296, now seen corresponding path program 1 times [2020-07-21 00:35:39,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:39,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872515421] [2020-07-21 00:35:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:39,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:39,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:35:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 00:35:39,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:39,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872515421] [2020-07-21 00:35:39,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:39,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:35:39,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059898521] [2020-07-21 00:35:39,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:35:39,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:35:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:35:39,356 INFO L87 Difference]: Start difference. First operand 214 states and 332 transitions. Second operand 6 states. [2020-07-21 00:35:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:39,411 INFO L93 Difference]: Finished difference Result 231 states and 350 transitions. [2020-07-21 00:35:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:35:39,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 00:35:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:39,415 INFO L225 Difference]: With dead ends: 231 [2020-07-21 00:35:39,415 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 00:35:39,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:35:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 00:35:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-07-21 00:35:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-21 00:35:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 338 transitions. [2020-07-21 00:35:39,434 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 338 transitions. Word has length 126 [2020-07-21 00:35:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:39,434 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 338 transitions. [2020-07-21 00:35:39,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:35:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 338 transitions. [2020-07-21 00:35:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-21 00:35:39,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:39,438 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] [2020-07-21 00:35:39,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:39,653 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1186381896, now seen corresponding path program 1 times [2020-07-21 00:35:39,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:39,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642656279] [2020-07-21 00:35:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:39,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:39,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:35:39,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 00:35:39,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 00:35:40,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642656279] [2020-07-21 00:35:40,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:40,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 00:35:40,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192772426] [2020-07-21 00:35:40,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:35:40,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:35:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:35:40,348 INFO L87 Difference]: Start difference. First operand 220 states and 338 transitions. Second operand 15 states. [2020-07-21 00:35:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:40,683 INFO L93 Difference]: Finished difference Result 246 states and 370 transitions. [2020-07-21 00:35:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:35:40,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 127 [2020-07-21 00:35:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:40,689 INFO L225 Difference]: With dead ends: 246 [2020-07-21 00:35:40,689 INFO L226 Difference]: Without dead ends: 229 [2020-07-21 00:35:40,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:35:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-21 00:35:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2020-07-21 00:35:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-21 00:35:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 319 transitions. [2020-07-21 00:35:40,706 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 319 transitions. Word has length 127 [2020-07-21 00:35:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:40,707 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 319 transitions. [2020-07-21 00:35:40,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:35:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 319 transitions. [2020-07-21 00:35:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-21 00:35:40,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:40,710 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:40,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:40,924 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1914998645, now seen corresponding path program 1 times [2020-07-21 00:35:40,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:40,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073705040] [2020-07-21 00:35:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:41,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:41,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:41,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:35:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 00:35:41,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:41,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073705040] [2020-07-21 00:35:41,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:35:41,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 00:35:41,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593581038] [2020-07-21 00:35:41,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:35:41,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:35:41,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:35:41,117 INFO L87 Difference]: Start difference. First operand 210 states and 319 transitions. Second operand 6 states. [2020-07-21 00:35:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:41,174 INFO L93 Difference]: Finished difference Result 215 states and 323 transitions. [2020-07-21 00:35:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:35:41,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-07-21 00:35:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:41,178 INFO L225 Difference]: With dead ends: 215 [2020-07-21 00:35:41,178 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 00:35:41,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:35:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 00:35:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 00:35:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 00:35:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2020-07-21 00:35:41,196 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 128 [2020-07-21 00:35:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:41,197 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2020-07-21 00:35:41,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:35:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2020-07-21 00:35:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-21 00:35:41,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:41,199 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:41,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:41,414 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash -412015497, now seen corresponding path program 1 times [2020-07-21 00:35:41,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:41,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14995507] [2020-07-21 00:35:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:41,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:41,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:41,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:35:41,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 00:35:41,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:35:41,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14995507] [2020-07-21 00:35:41,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:35:41,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 00:35:41,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17222548] [2020-07-21 00:35:41,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:35:41,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:35:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:35:41,600 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand 8 states. [2020-07-21 00:35:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:41,746 INFO L93 Difference]: Finished difference Result 229 states and 340 transitions. [2020-07-21 00:35:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:35:41,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-07-21 00:35:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:41,749 INFO L225 Difference]: With dead ends: 229 [2020-07-21 00:35:41,749 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 00:35:41,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:35:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 00:35:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-21 00:35:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 00:35:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-07-21 00:35:41,766 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 131 [2020-07-21 00:35:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:41,767 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-07-21 00:35:41,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:35:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-07-21 00:35:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:35:41,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:41,769 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:41,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:41,982 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-07-21 00:35:41,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:41,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638803458] [2020-07-21 00:35:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:42,069 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:42,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:35:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 00:35:42,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:45,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638803458] [2020-07-21 00:35:45,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:35:45,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-21 00:35:45,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628332499] [2020-07-21 00:35:45,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 00:35:45,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 00:35:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2020-07-21 00:35:45,063 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 7 states. [2020-07-21 00:35:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:45,190 INFO L93 Difference]: Finished difference Result 221 states and 283 transitions. [2020-07-21 00:35:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:35:45,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-07-21 00:35:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:45,193 INFO L225 Difference]: With dead ends: 221 [2020-07-21 00:35:45,194 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 00:35:45,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2020-07-21 00:35:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 00:35:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 00:35:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 00:35:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-21 00:35:45,210 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-21 00:35:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:45,211 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-21 00:35:45,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 00:35:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-21 00:35:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:35:45,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:45,213 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:45,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:45,427 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:45,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-07-21 00:35:45,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:45,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188300669] [2020-07-21 00:35:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:45,540 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:45,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:45,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:35:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 00:35:45,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:45,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188300669] [2020-07-21 00:35:45,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:35:45,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 00:35:45,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072803434] [2020-07-21 00:35:45,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:35:45,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:35:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:35:45,986 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 10 states. [2020-07-21 00:35:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:46,253 INFO L93 Difference]: Finished difference Result 224 states and 285 transitions. [2020-07-21 00:35:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:35:46,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 00:35:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:46,260 INFO L225 Difference]: With dead ends: 224 [2020-07-21 00:35:46,260 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 00:35:46,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:35:46,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 00:35:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 00:35:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 00:35:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-07-21 00:35:46,280 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 135 [2020-07-21 00:35:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:46,280 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-07-21 00:35:46,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:35:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-07-21 00:35:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:35:46,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:46,283 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:46,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:46,488 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-07-21 00:35:46,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:46,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352260319] [2020-07-21 00:35:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:46,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:46,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 00:35:46,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 00:35:46,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:47,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352260319] [2020-07-21 00:35:47,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:35:47,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-21 00:35:47,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721696753] [2020-07-21 00:35:47,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:35:47,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:47,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:35:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:35:47,689 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 14 states. [2020-07-21 00:35:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:48,281 INFO L93 Difference]: Finished difference Result 219 states and 276 transitions. [2020-07-21 00:35:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:35:48,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-07-21 00:35:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:48,285 INFO L225 Difference]: With dead ends: 219 [2020-07-21 00:35:48,286 INFO L226 Difference]: Without dead ends: 201 [2020-07-21 00:35:48,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:35:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-21 00:35:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-07-21 00:35:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 00:35:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 257 transitions. [2020-07-21 00:35:48,315 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 257 transitions. Word has length 135 [2020-07-21 00:35:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:48,316 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 257 transitions. [2020-07-21 00:35:48,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:35:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 257 transitions. [2020-07-21 00:35:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:35:48,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:48,318 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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] [2020-07-21 00:35:48,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:48,531 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-07-21 00:35:48,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:48,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997315879] [2020-07-21 00:35:48,533 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:48,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:35:48,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:35:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-07-21 00:35:48,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:49,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997315879] [2020-07-21 00:35:49,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:35:49,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 00:35:49,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013915594] [2020-07-21 00:35:49,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:35:49,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:35:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:35:49,134 INFO L87 Difference]: Start difference. First operand 201 states and 257 transitions. Second operand 10 states. [2020-07-21 00:35:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:49,370 INFO L93 Difference]: Finished difference Result 201 states and 257 transitions. [2020-07-21 00:35:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:35:49,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 00:35:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:49,371 INFO L225 Difference]: With dead ends: 201 [2020-07-21 00:35:49,372 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:35:49,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:35:49,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:35:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:35:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:35:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:35:49,374 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 00:35:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:49,374 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:35:49,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:35:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:35:49,374 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:35:49,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:49,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:35:50,094 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 359 [2020-07-21 00:35:50,203 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 359 [2020-07-21 00:35:50,320 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 359 [2020-07-21 00:35:50,729 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-07-21 00:35:51,248 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 39 [2020-07-21 00:35:52,042 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 20 [2020-07-21 00:35:52,053 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:35:52,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:35:52,053 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 00:35:52,053 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 00:35:52,053 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|))) [2020-07-21 00:35:52,054 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 00:35:52,054 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 00:35:52,054 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 00:35:52,054 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (<= base2flt_~e |base2flt_#in~e|) (or (< (mod base2flt_~m 4294967296) 16777216) (not (= 1 |base2flt_#in~m|)))) [2020-07-21 00:35:52,054 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 00:35:52,054 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 00:35:52,054 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 00:35:52,054 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-21 00:35:52,055 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 00:35:52,055 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= 16777216 (mod |base2flt_#in~m| 4294967296)) (<= |base2flt_#in~e| base2flt_~e)) [2020-07-21 00:35:52,055 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 00:35:52,055 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 00:35:52,055 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 00:35:52,055 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 00:35:52,055 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 00:35:52,055 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 00:35:52,055 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 00:35:52,056 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 00:35:52,056 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 00:35:52,056 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 00:35:52,056 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= mulflt_~b |mulflt_#in~a|)) (.cse5 (not (= 0 (mod |mulflt_#in~a| 4294967296)))) (.cse4 (= mulflt_~a |mulflt_#in~a|))) (let ((.cse0 (exists ((v_mulflt_~a_50 Int)) (< (mod v_mulflt_~a_50 4294967296) (mod |mulflt_#in~b| 4294967296)))) (.cse2 (or (and .cse5 .cse1) (and .cse5 .cse4))) (.cse3 (= 0 mulflt_~__retres10~1))) (or (and .cse0 .cse1 .cse2) (and .cse0 (= mulflt_~b |mulflt_#in~b|) (<= (mod |mulflt_#in~b| 4294967296) (mod |mulflt_#in~a| 4294967296)) .cse2) (and .cse1 .cse3) (and .cse4 .cse3 (or .cse5 (= 0 (mod mulflt_~b 4294967296))))))) [2020-07-21 00:35:52,056 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 00:35:52,056 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:35:52,056 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:35:52,056 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 00:35:52,057 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 00:35:52,059 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 00:35:52,059 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 00:35:52,059 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 00:35:52,059 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 00:35:52,059 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 00:35:52,060 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 00:35:52,060 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 00:35:52,060 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 00:35:52,060 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-21 00:35:52,060 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 00:35:52,060 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (or (= 0 main_~zero~0) (= 0 main_~a~0)) [2020-07-21 00:35:52,060 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (<= (+ main_~sa~0 1) 0) (and (<= 1 main_~sa~0) (<= 1 main_~tmp~2)) (and .cse0 (= 0 main_~b~0)) (and .cse0 (<= (mod main_~a~0 4294967296) 0)) (and (= 0 main_~a~0) (<= (mod main_~zero~0 4294967296) (mod main_~a~0 4294967296))))) [2020-07-21 00:35:52,061 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 00:35:52,061 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 00:35:52,061 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 00:35:52,061 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 00:35:52,061 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 00:35:52,061 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 00:35:52,061 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 00:35:52,061 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 00:35:52,062 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 00:35:52,062 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 00:35:52,062 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 00:35:52,062 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 00:35:52,062 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 00:35:52,062 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 00:35:52,062 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 00:35:52,063 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 00:35:52,064 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 00:35:52,064 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 00:35:52,064 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 00:35:52,064 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 00:35:52,064 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 00:35:52,064 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 00:35:52,090 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 00:35:52,092 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 00:35:52,096 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 00:35:52,097 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 00:35:52,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:35:52 BoogieIcfgContainer [2020-07-21 00:35:52,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:35:52,118 INFO L168 Benchmark]: Toolchain (without parser) took 271403.10 ms. Allocated memory was 137.9 MB in the beginning and 275.8 MB in the end (delta: 137.9 MB). Free memory was 102.5 MB in the beginning and 200.9 MB in the end (delta: -98.4 MB). Peak memory consumption was 175.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:35:52,119 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory is still 120.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 00:35:52,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.86 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 179.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:35:52,120 INFO L168 Benchmark]: Boogie Preprocessor took 42.89 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 177.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-21 00:35:52,120 INFO L168 Benchmark]: RCFGBuilder took 527.12 ms. Allocated memory is still 201.3 MB. Free memory was 177.6 MB in the beginning and 152.8 MB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:35:52,120 INFO L168 Benchmark]: TraceAbstraction took 270358.72 ms. Allocated memory was 201.3 MB in the beginning and 275.8 MB in the end (delta: 74.4 MB). Free memory was 152.2 MB in the beginning and 200.9 MB in the end (delta: -48.7 MB). Peak memory consumption was 161.1 MB. Max. memory is 7.1 GB. [2020-07-21 00:35:52,123 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory is still 120.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 464.86 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 179.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.89 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 177.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 527.12 ms. Allocated memory is still 201.3 MB. Free memory was 177.6 MB in the beginning and 152.8 MB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 270358.72 ms. Allocated memory was 201.3 MB in the beginning and 275.8 MB in the end (delta: 74.4 MB). Free memory was 152.2 MB in the beginning and 200.9 MB in the end (delta: -48.7 MB). Peak memory consumption was 161.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) || (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 00:35:52,131 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 00:35:52,132 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 00:35:52,132 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 00:35:52,133 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] Derived loop invariant: (((((\exists v_mulflt_~a_50 : int :: v_mulflt_~a_50 % 4294967296 < \old(b) % 4294967296) && b == \old(a)) && ((!(0 == \old(a) % 4294967296) && b == \old(a)) || (!(0 == \old(a) % 4294967296) && a == \old(a)))) || ((((\exists v_mulflt_~a_50 : int :: v_mulflt_~a_50 % 4294967296 < \old(b) % 4294967296) && b == \old(b)) && \old(b) % 4294967296 <= \old(a) % 4294967296) && ((!(0 == \old(a) % 4294967296) && b == \old(a)) || (!(0 == \old(a) % 4294967296) && a == \old(a))))) || (b == \old(a) && 0 == __retres10)) || ((a == \old(a) && 0 == __retres10) && (!(0 == \old(a) % 4294967296) || 0 == b % 4294967296)) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 16777216 <= \old(m) % 4294967296 && \old(e) <= e - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (!(\old(m) % 4294967296 <= 0) && e <= \old(e)) && (m % 4294967296 < 16777216 || !(1 == \old(m))) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 267.7s, OverallIterations: 24, TraceHistogramMax: 24, AutomataDifference: 248.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1666 SDtfs, 2991 SDslu, 8327 SDs, 0 SdLazy, 3600 SolverSat, 387 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 16.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3248 GetRequests, 2869 SyntacticMatches, 18 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 239.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 24 MinimizatonAttempts, 732 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 227 PreInvPairs, 767 NumberOfFragments, 223 HoareAnnotationTreeSize, 227 FomulaSimplifications, 7526 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 18 FomulaSimplificationsInter, 10309 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 2335 NumberOfCodeBlocks, 2022 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 2961 ConstructedInterpolants, 9 QuantifiedInterpolants, 639611 SizeOfPredicates, 58 NumberOfNonLiveVariables, 5276 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 11648/14234 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...