/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:02:32,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:02:32,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:02:32,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:02:32,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:32,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:32,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:32,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:32,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:32,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:32,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:32,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:32,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:32,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:32,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:32,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:32,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:32,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:32,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:32,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:32,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:32,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:32,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:32,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:32,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:02:32,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:02:32,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:02:32,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:02:32,625 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 22:02:32,644 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:32,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:32,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:32,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:32,646 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:32,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:32,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:32,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:32,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:32,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:32,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:32,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:32,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:32,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:32,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:32,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:32,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:32,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:32,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:32,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:32,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:32,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:32,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:32,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:32,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:32,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:32,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:32,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:32,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:32,651 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 22:02:32,921 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:32,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:32,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:32,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:32,940 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:32,941 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 22:02:33,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26d9e7e5/8c988d3722b04fc79ff7b10fdadf2307/FLAGde14c0eb5 [2020-07-21 22:02:33,487 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:33,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 22:02:33,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26d9e7e5/8c988d3722b04fc79ff7b10fdadf2307/FLAGde14c0eb5 [2020-07-21 22:02:33,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26d9e7e5/8c988d3722b04fc79ff7b10fdadf2307 [2020-07-21 22:02:33,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:33,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:33,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:33,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:33,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:33,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:33" (1/1) ... [2020-07-21 22:02:33,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454fcd08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:33, skipping insertion in model container [2020-07-21 22:02:33,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:33" (1/1) ... [2020-07-21 22:02:33,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:33,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:34,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:34,165 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:34,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:34,320 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:34,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34 WrapperNode [2020-07-21 22:02:34,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:34,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:34,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:34,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:34,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (1/1) ... [2020-07-21 22:02:34,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (1/1) ... [2020-07-21 22:02:34,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (1/1) ... [2020-07-21 22:02:34,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (1/1) ... [2020-07-21 22:02:34,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (1/1) ... [2020-07-21 22:02:34,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (1/1) ... [2020-07-21 22:02:34,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (1/1) ... [2020-07-21 22:02:34,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:34,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:34,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:34,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:34,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (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 22:02:34,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:34,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:34,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 22:02:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 22:02:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 22:02:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 22:02:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 22:02:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 22:02:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 22:02:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 22:02:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 22:02:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 22:02:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:34,994 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:34,994 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 22:02:35,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:35 BoogieIcfgContainer [2020-07-21 22:02:35,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:35,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:35,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:35,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:35,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:33" (1/3) ... [2020-07-21 22:02:35,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9badef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:35, skipping insertion in model container [2020-07-21 22:02:35,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34" (2/3) ... [2020-07-21 22:02:35,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9badef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:35, skipping insertion in model container [2020-07-21 22:02:35,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:35" (3/3) ... [2020-07-21 22:02:35,010 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-21 22:02:35,018 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:35,026 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:35,039 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:35,063 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:35,064 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:35,064 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:35,064 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:35,064 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:35,064 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:35,065 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:35,065 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 22:02:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 22:02:35,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:35,090 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 22:02:35,091 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 22:02:35,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:35,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141968672] [2020-07-21 22:02:35,105 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 22:02:35,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:35,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:02:35,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:35,311 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 22:02:35,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:35,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141968672] [2020-07-21 22:02:35,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:35,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:35,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734526972] [2020-07-21 22:02:35,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:35,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:35,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:35,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:35,335 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-21 22:02:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:35,514 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-21 22:02:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:35,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-21 22:02:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:35,536 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:02:35,536 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 22:02:35,542 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 22:02:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 22:02:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-21 22:02:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 22:02:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-21 22:02:35,629 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-21 22:02:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:35,630 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-21 22:02:35,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-21 22:02:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 22:02:35,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:35,634 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 22:02:35,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:35,849 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-21 22:02:35,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:35,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095333027] [2020-07-21 22:02:35,852 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 22:02:35,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:35,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:35,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:02:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:35,954 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 22:02:35,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:35,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095333027] [2020-07-21 22:02:35,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:35,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:35,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39696832] [2020-07-21 22:02:35,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:35,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:35,959 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-21 22:02:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:36,080 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-21 22:02:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:02:36,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-21 22:02:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:36,087 INFO L225 Difference]: With dead ends: 113 [2020-07-21 22:02:36,087 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 22:02:36,090 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 22:02:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 22:02:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-21 22:02:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 22:02:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-21 22:02:36,108 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-21 22:02:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:36,109 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-21 22:02:36,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-21 22:02:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:02:36,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:36,111 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 22:02:36,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:36,326 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-21 22:02:36,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:36,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869213757] [2020-07-21 22:02:36,329 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 22:02:36,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:02:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:36,440 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 22:02:36,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:36,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869213757] [2020-07-21 22:02:36,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:36,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:36,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79775444] [2020-07-21 22:02:36,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:36,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:36,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:36,451 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-21 22:02:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:36,551 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-21 22:02:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:02:36,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 22:02:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:36,554 INFO L225 Difference]: With dead ends: 124 [2020-07-21 22:02:36,554 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:02:36,556 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 22:02:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:02:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-21 22:02:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:02:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-21 22:02:36,580 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-21 22:02:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:36,581 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-21 22:02:36,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-21 22:02:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:02:36,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:36,591 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 22:02:36,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:36,792 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-21 22:02:36,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:36,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325169599] [2020-07-21 22:02:36,795 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 22:02:36,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:36,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:36,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:02:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:36,869 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 22:02:36,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:36,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325169599] [2020-07-21 22:02:36,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:36,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:36,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764355714] [2020-07-21 22:02:36,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:36,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:36,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:36,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:36,871 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-21 22:02:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:36,956 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-21 22:02:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:36,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 22:02:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:36,959 INFO L225 Difference]: With dead ends: 128 [2020-07-21 22:02:36,959 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 22:02:36,964 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 22:02:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 22:02:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-21 22:02:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 22:02:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-21 22:02:36,990 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-21 22:02:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:36,990 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-21 22:02:36,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-21 22:02:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 22:02:36,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:36,995 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 22:02:37,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:37,209 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-21 22:02:37,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:37,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222159234] [2020-07-21 22:02:37,210 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 22:02:37,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:02:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:37,298 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 22:02:37,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:37,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222159234] [2020-07-21 22:02:37,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:37,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:02:37,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219919740] [2020-07-21 22:02:37,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:02:37,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:02:37,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:02:37,300 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-21 22:02:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:37,431 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-21 22:02:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:02:37,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-21 22:02:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:37,434 INFO L225 Difference]: With dead ends: 133 [2020-07-21 22:02:37,434 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 22:02:37,435 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 22:02:37,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 22:02:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-21 22:02:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:02:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-21 22:02:37,446 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-21 22:02:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:37,446 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-21 22:02:37,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:02:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-21 22:02:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:02:37,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:37,448 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 22:02:37,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:37,654 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-21 22:02:37,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:37,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064558370] [2020-07-21 22:02:37,657 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 22:02:37,701 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:37,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:37,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:37,746 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 22:02:37,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:37,840 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 22:02:37,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064558370] [2020-07-21 22:02:37,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:37,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 22:02:37,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602311340] [2020-07-21 22:02:37,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:02:37,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:02:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:02:37,843 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-21 22:02:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:37,969 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-21 22:02:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:02:37,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-21 22:02:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:37,972 INFO L225 Difference]: With dead ends: 147 [2020-07-21 22:02:37,974 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 22:02:37,975 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 22:02:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 22:02:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-21 22:02:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 22:02:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-21 22:02:37,999 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-21 22:02:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:38,000 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-21 22:02:38,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:02:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-21 22:02:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 22:02:38,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:38,005 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 22:02:38,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:38,206 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-21 22:02:38,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:38,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654811065] [2020-07-21 22:02:38,206 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 22:02:38,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:38,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:02:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:38,304 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 22:02:38,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:38,453 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 22:02:38,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654811065] [2020-07-21 22:02:38,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:38,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 22:02:38,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536877950] [2020-07-21 22:02:38,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:02:38,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:02:38,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:02:38,455 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-21 22:02:44,848 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:02:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:45,019 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-21 22:02:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:02:45,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-21 22:02:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:45,022 INFO L225 Difference]: With dead ends: 172 [2020-07-21 22:02:45,022 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 22:02:45,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:02:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 22:02:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-21 22:02:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:02:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-21 22:02:45,035 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-21 22:02:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:45,035 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-21 22:02:45,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:02:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-21 22:02:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-21 22:02:45,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:45,037 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 22:02:45,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:45,248 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-21 22:02:45,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:45,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659152022] [2020-07-21 22:02:45,251 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 22:02:45,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:45,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:02:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:45,366 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 22:02:45,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:45,552 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 22:02:45,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659152022] [2020-07-21 22:02:45,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:45,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 22:02:45,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890594988] [2020-07-21 22:02:45,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:02:45,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:45,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:02:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:02:45,557 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-21 22:02:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:45,710 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-21 22:02:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:02:45,711 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-21 22:02:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:45,713 INFO L225 Difference]: With dead ends: 210 [2020-07-21 22:02:45,713 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 22:02:45,714 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 22:02:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 22:02:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-21 22:02:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:02:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-21 22:02:45,730 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-21 22:02:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:45,731 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-21 22:02:45,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:02:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-21 22:02:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 22:02:45,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:45,732 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 22:02:45,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:45,947 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-21 22:02:45,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:45,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029576386] [2020-07-21 22:02:45,949 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 22:02:45,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:45,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:45,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:02:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:46,072 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 22:02:46,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:46,397 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 22:02:46,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029576386] [2020-07-21 22:02:46,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:46,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 22:02:46,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082604421] [2020-07-21 22:02:46,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:02:46,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:46,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:02:46,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:02:46,405 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-21 22:02:57,223 WARN L193 SmtUtils]: Spent 10.33 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 22:03:07,785 WARN L193 SmtUtils]: Spent 10.35 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 22:03:20,756 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 22:03:43,993 WARN L193 SmtUtils]: Spent 14.47 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:03:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:56,042 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-21 22:03:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 22:03:56,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-21 22:03:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:56,044 INFO L225 Difference]: With dead ends: 242 [2020-07-21 22:03:56,045 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 22:03:56,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=317, Invalid=601, Unknown=12, NotChecked=0, Total=930 [2020-07-21 22:03:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 22:03:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-21 22:03:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-21 22:03:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-21 22:03:56,062 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-21 22:03:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:56,063 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-21 22:03:56,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:03:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-21 22:03:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 22:03:56,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:56,064 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 22:03:56,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:56,280 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-21 22:03:56,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:56,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111020701] [2020-07-21 22:03:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:56,345 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:56,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:56,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:03:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:56,506 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 22:03:56,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:56,975 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 22:03:56,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111020701] [2020-07-21 22:03:56,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:56,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 22:03:56,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856873783] [2020-07-21 22:03:56,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:03:56,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:03:56,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:03:56,978 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-21 22:03:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:57,407 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-21 22:03:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 22:03:57,408 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-21 22:03:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:57,411 INFO L225 Difference]: With dead ends: 336 [2020-07-21 22:03:57,411 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 22:03:57,413 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 22:03:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 22:03:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-21 22:03:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-21 22:03:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-21 22:03:57,452 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-21 22:03:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:57,452 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-21 22:03:57,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:03:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-21 22:03:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 22:03:57,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:57,455 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 22:03:57,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:57,656 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:57,656 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-21 22:03:57,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:57,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433903430] [2020-07-21 22:03:57,657 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 22:03:57,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:57,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 22:03:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:57,996 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 22:03:57,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:58,898 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 22:03:58,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433903430] [2020-07-21 22:03:58,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:58,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 22:03:58,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346566741] [2020-07-21 22:03:58,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:03:58,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:58,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:03:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:03:58,900 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-21 22:04:32,373 WARN L193 SmtUtils]: Spent 25.73 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 22:04:42,385 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 22:05:11,344 WARN L193 SmtUtils]: Spent 18.27 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 22:05:45,123 WARN L193 SmtUtils]: Spent 18.78 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 22:06:12,351 WARN L193 SmtUtils]: Spent 12.59 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 22:06:45,948 WARN L193 SmtUtils]: Spent 12.72 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 22:07:16,108 WARN L193 SmtUtils]: Spent 12.53 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 22:07:34,155 WARN L193 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 22:07:45,026 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:08:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:01,331 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-21 22:08:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-21 22:08:01,333 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-21 22:08:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:01,336 INFO L225 Difference]: With dead ends: 346 [2020-07-21 22:08:01,337 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 22:08:01,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 234.6s TimeCoverageRelationStatistics Valid=1021, Invalid=2354, Unknown=47, NotChecked=0, Total=3422 [2020-07-21 22:08:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 22:08:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-21 22:08:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 22:08:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-21 22:08:01,361 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-21 22:08:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:01,361 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-21 22:08:01,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:08:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-21 22:08:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 22:08:01,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:01,364 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 22:08:01,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:01,579 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-21 22:08:01,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:01,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224092392] [2020-07-21 22:08:01,581 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 22:08:01,685 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:08:01,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 22:08:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:02,319 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 22:08:02,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:08:04,534 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 22:08:04,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224092392] [2020-07-21 22:08:04,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:08:04,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 22:08:04,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045459359] [2020-07-21 22:08:04,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 22:08:04,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 22:08:04,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 22:08:04,545 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-21 22:08:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:06,230 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-21 22:08:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 22:08:06,232 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-21 22:08:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:06,238 INFO L225 Difference]: With dead ends: 570 [2020-07-21 22:08:06,238 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 22:08:06,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 22:08:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 22:08:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-21 22:08:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 22:08:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-21 22:08:06,281 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-21 22:08:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:06,282 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-21 22:08:06,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 22:08:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-21 22:08:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 22:08:06,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:06,284 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 22:08:06,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:06,499 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:06,499 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-21 22:08:06,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:06,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742647056] [2020-07-21 22:08:06,500 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 22:08:06,578 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:06,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:08:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:06,616 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 22:08:06,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:08:06,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742647056] [2020-07-21 22:08:06,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:08:06,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:08:06,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850136114] [2020-07-21 22:08:06,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:08:06,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:06,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:08:06,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:08:06,618 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 3 states. [2020-07-21 22:08:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:06,637 INFO L93 Difference]: Finished difference Result 209 states and 323 transitions. [2020-07-21 22:08:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:08:06,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-07-21 22:08:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:06,641 INFO L225 Difference]: With dead ends: 209 [2020-07-21 22:08:06,641 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 22:08:06,642 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 22:08:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 22:08:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 22:08:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 22:08:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 309 transitions. [2020-07-21 22:08:06,659 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 309 transitions. Word has length 122 [2020-07-21 22:08:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:06,660 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 309 transitions. [2020-07-21 22:08:06,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:08:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 309 transitions. [2020-07-21 22:08:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 22:08:06,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:06,662 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 22:08:06,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:06,877 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:06,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1044966756, now seen corresponding path program 1 times [2020-07-21 22:08:06,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:06,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106091282] [2020-07-21 22:08:06,879 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 22:08:06,962 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:06,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:08:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:07,007 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 22:08:07,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:08:07,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106091282] [2020-07-21 22:08:07,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:08:07,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:08:07,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483850240] [2020-07-21 22:08:07,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:08:07,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:07,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:08:07,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:08:07,011 INFO L87 Difference]: Start difference. First operand 198 states and 309 transitions. Second operand 4 states. [2020-07-21 22:08:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:07,049 INFO L93 Difference]: Finished difference Result 210 states and 323 transitions. [2020-07-21 22:08:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:08:07,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-07-21 22:08:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:07,052 INFO L225 Difference]: With dead ends: 210 [2020-07-21 22:08:07,052 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 22:08:07,053 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 22:08:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 22:08:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 22:08:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 22:08:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-21 22:08:07,070 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 124 [2020-07-21 22:08:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:07,071 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-21 22:08:07,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:08:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-21 22:08:07,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 22:08:07,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:07,074 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 22:08:07,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:07,289 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:07,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 1 times [2020-07-21 22:08:07,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:07,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011975568] [2020-07-21 22:08:07,290 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 22:08:07,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:07,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:07,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:08:07,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 22:08:07,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:08:07,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011975568] [2020-07-21 22:08:07,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:08:07,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 22:08:07,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105573155] [2020-07-21 22:08:07,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:08:07,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:08:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:08:07,495 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 8 states. [2020-07-21 22:08:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:07,742 INFO L93 Difference]: Finished difference Result 238 states and 363 transitions. [2020-07-21 22:08:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:08:07,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-07-21 22:08:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:07,746 INFO L225 Difference]: With dead ends: 238 [2020-07-21 22:08:07,747 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 22:08:07,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:08:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 22:08:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 213. [2020-07-21 22:08:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-21 22:08:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 328 transitions. [2020-07-21 22:08:07,764 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 328 transitions. Word has length 124 [2020-07-21 22:08:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:07,765 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 328 transitions. [2020-07-21 22:08:07,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:08:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 328 transitions. [2020-07-21 22:08:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 22:08:07,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:07,767 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 22:08:07,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:07,981 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:07,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-07-21 22:08:07,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:07,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996900887] [2020-07-21 22:08:07,982 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 22:08:08,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:08,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:08:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 22:08:08,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:08:08,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996900887] [2020-07-21 22:08:08,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:08:08,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 22:08:08,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672781982] [2020-07-21 22:08:08,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:08:08,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:08:08,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:08:08,221 INFO L87 Difference]: Start difference. First operand 213 states and 328 transitions. Second operand 8 states. [2020-07-21 22:08:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:08,353 INFO L93 Difference]: Finished difference Result 224 states and 340 transitions. [2020-07-21 22:08:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:08:08,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-07-21 22:08:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:08,357 INFO L225 Difference]: With dead ends: 224 [2020-07-21 22:08:08,357 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 22:08:08,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:08:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 22:08:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-07-21 22:08:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 22:08:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 331 transitions. [2020-07-21 22:08:08,378 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 331 transitions. Word has length 124 [2020-07-21 22:08:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:08,378 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 331 transitions. [2020-07-21 22:08:08,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:08:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 331 transitions. [2020-07-21 22:08:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 22:08:08,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:08,380 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 22:08:08,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:08,596 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-07-21 22:08:08,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:08,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833772279] [2020-07-21 22:08:08,597 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 22:08:08,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:08,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:08:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:08,741 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 22:08:08,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:08:08,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833772279] [2020-07-21 22:08:08,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:08:08,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 22:08:08,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556726015] [2020-07-21 22:08:08,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:08:08,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:08,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:08:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:08:08,745 INFO L87 Difference]: Start difference. First operand 216 states and 331 transitions. Second operand 6 states. [2020-07-21 22:08:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:08,812 INFO L93 Difference]: Finished difference Result 222 states and 336 transitions. [2020-07-21 22:08:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:08:08,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 22:08:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:08,817 INFO L225 Difference]: With dead ends: 222 [2020-07-21 22:08:08,817 INFO L226 Difference]: Without dead ends: 216 [2020-07-21 22:08:08,818 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 22:08:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-21 22:08:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-07-21 22:08:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 22:08:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 330 transitions. [2020-07-21 22:08:08,836 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 330 transitions. Word has length 126 [2020-07-21 22:08:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:08,837 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 330 transitions. [2020-07-21 22:08:08,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:08:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 330 transitions. [2020-07-21 22:08:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 22:08:08,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:08,839 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 22:08:09,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:09,055 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-21 22:08:09,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:09,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423081178] [2020-07-21 22:08:09,057 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 22:08:09,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:09,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:08:09,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:09,212 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 22:08:09,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:08:09,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423081178] [2020-07-21 22:08:09,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:08:09,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 22:08:09,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996435132] [2020-07-21 22:08:09,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:08:09,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:08:09,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:08:09,215 INFO L87 Difference]: Start difference. First operand 216 states and 330 transitions. Second operand 6 states. [2020-07-21 22:08:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:09,297 INFO L93 Difference]: Finished difference Result 230 states and 344 transitions. [2020-07-21 22:08:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:08:09,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 22:08:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:09,301 INFO L225 Difference]: With dead ends: 230 [2020-07-21 22:08:09,301 INFO L226 Difference]: Without dead ends: 215 [2020-07-21 22:08:09,302 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 22:08:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-21 22:08:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2020-07-21 22:08:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-21 22:08:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 319 transitions. [2020-07-21 22:08:09,319 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 319 transitions. Word has length 126 [2020-07-21 22:08:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:09,320 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 319 transitions. [2020-07-21 22:08:09,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:08:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 319 transitions. [2020-07-21 22:08:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-21 22:08:09,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:09,322 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 22:08:09,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:09,535 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:09,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1043468215, now seen corresponding path program 1 times [2020-07-21 22:08:09,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:09,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653952242] [2020-07-21 22:08:09,536 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 22:08:09,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:09,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:09,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:08:09,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:09,692 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 22:08:09,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:08:09,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653952242] [2020-07-21 22:08:09,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:08:09,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 22:08:09,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455872615] [2020-07-21 22:08:09,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:08:09,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:09,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:08:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:08:09,744 INFO L87 Difference]: Start difference. First operand 210 states and 319 transitions. Second operand 6 states. [2020-07-21 22:08:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:09,813 INFO L93 Difference]: Finished difference Result 215 states and 323 transitions. [2020-07-21 22:08:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:08:09,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-07-21 22:08:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:09,817 INFO L225 Difference]: With dead ends: 215 [2020-07-21 22:08:09,818 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 22:08:09,819 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 22:08:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 22:08:09,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 22:08:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 22:08:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2020-07-21 22:08:09,839 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 128 [2020-07-21 22:08:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:09,839 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2020-07-21 22:08:09,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:08:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2020-07-21 22:08:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-21 22:08:09,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:09,841 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 22:08:10,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:10,055 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-07-21 22:08:10,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:10,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778128455] [2020-07-21 22:08:10,056 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 22:08:10,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:10,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:08:10,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 22:08:10,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:08:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 22:08:10,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778128455] [2020-07-21 22:08:10,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:08:10,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 22:08:10,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389399273] [2020-07-21 22:08:10,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:08:10,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:08:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:08:10,679 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand 15 states. [2020-07-21 22:08:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:10,995 INFO L93 Difference]: Finished difference Result 231 states and 344 transitions. [2020-07-21 22:08:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:08:11,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 131 [2020-07-21 22:08:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:11,005 INFO L225 Difference]: With dead ends: 231 [2020-07-21 22:08:11,006 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 22:08:11,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:08:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 22:08:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-21 22:08:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 22:08:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-07-21 22:08:11,023 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 131 [2020-07-21 22:08:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:11,023 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-07-21 22:08:11,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:08:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-07-21 22:08:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:08:11,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:11,026 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 22:08:11,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:11,239 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-07-21 22:08:11,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:11,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977439672] [2020-07-21 22:08:11,243 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 22:08:11,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:08:11,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 22:08:11,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:08:11,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977439672] [2020-07-21 22:08:11,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:08:11,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 22:08:11,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694979728] [2020-07-21 22:08:11,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 22:08:11,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 22:08:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:08:11,443 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 7 states. [2020-07-21 22:08:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:11,606 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2020-07-21 22:08:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:08:11,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-07-21 22:08:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:11,611 INFO L225 Difference]: With dead ends: 219 [2020-07-21 22:08:11,611 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 22:08:11,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:08:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 22:08:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 22:08:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 22:08:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-21 22:08:11,636 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-21 22:08:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:11,637 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-21 22:08:11,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 22:08:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-21 22:08:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:08:11,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:11,639 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 22:08:11,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:11,852 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-07-21 22:08:11,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:11,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102854949] [2020-07-21 22:08:11,853 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 22:08:11,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:08:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:14,172 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_mulflt_~b_46 Int)) (< (mod |c_mulflt_#in~a| 4294967296) (mod v_mulflt_~b_46 4294967296))) is different from true [2020-07-21 22:08:14,191 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 22:08:14,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:08:15,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102854949] [2020-07-21 22:08:15,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:08:15,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 22:08:15,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041447039] [2020-07-21 22:08:15,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:08:15,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:15,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:08:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-07-21 22:08:15,721 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 8 states. [2020-07-21 22:08:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:15,894 INFO L93 Difference]: Finished difference Result 240 states and 306 transitions. [2020-07-21 22:08:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:08:15,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-21 22:08:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:15,900 INFO L225 Difference]: With dead ends: 240 [2020-07-21 22:08:15,900 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 22:08:15,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2020-07-21 22:08:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 22:08:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2020-07-21 22:08:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 22:08:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 278 transitions. [2020-07-21 22:08:15,920 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 278 transitions. Word has length 135 [2020-07-21 22:08:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:15,920 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 278 transitions. [2020-07-21 22:08:15,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:08:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 278 transitions. [2020-07-21 22:08:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:08:15,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:15,923 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 22:08:16,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:16,139 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:16,139 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-21 22:08:16,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:16,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289053868] [2020-07-21 22:08:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:08:16,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:16,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:08:16,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:16,437 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 22:08:16,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:08:16,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289053868] [2020-07-21 22:08:16,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:08:16,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 22:08:16,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616990678] [2020-07-21 22:08:16,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:08:16,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:16,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:08:16,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:08:16,744 INFO L87 Difference]: Start difference. First operand 216 states and 278 transitions. Second operand 9 states. [2020-07-21 22:08:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:16,959 INFO L93 Difference]: Finished difference Result 224 states and 290 transitions. [2020-07-21 22:08:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:08:16,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-21 22:08:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:16,961 INFO L225 Difference]: With dead ends: 224 [2020-07-21 22:08:16,961 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:08:16,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:08:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:08:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:08:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:08:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:08:16,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 22:08:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:16,967 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:08:16,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:08:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:08:16,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:08:17,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:17,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:08:17,787 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 352 [2020-07-21 22:08:17,920 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 352 [2020-07-21 22:08:18,053 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 352 [2020-07-21 22:08:18,183 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 352 [2020-07-21 22:08:18,309 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 352 [2020-07-21 22:08:18,595 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-07-21 22:08:19,170 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 27 [2020-07-21 22:08:20,623 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 894 DAG size of output: 20 [2020-07-21 22:08:20,633 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:08:20,634 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:08:20,634 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 22:08:20,634 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 22:08:20,634 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-21 22:08:20,635 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 22:08:20,635 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 22:08:20,635 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 22:08:20,635 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 22:08:20,635 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 22:08:20,635 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 22:08:20,635 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 22:08:20,636 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-21 22:08:20,636 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 22:08:20,636 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 22:08:20,636 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 22:08:20,636 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 22:08:20,636 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 22:08:20,636 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 22:08:20,636 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 22:08:20,636 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 22:08:20,637 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 22:08:20,637 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 22:08:20,637 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 22:08:20,637 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 22:08:20,637 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= 0 mulflt_~__retres10~1)) (.cse2 (not (= 0 (mod |mulflt_#in~a| 4294967296)))) (.cse0 (exists ((v_mulflt_~a_34 Int)) (< (mod v_mulflt_~a_34 4294967296) (mod |mulflt_#in~b| 4294967296))))) (or (and .cse0 .cse1) (and (= mulflt_~b |mulflt_#in~b|) .cse1) (and .cse2 .cse0 (= mulflt_~a |mulflt_#in~a|)) (and .cse2 .cse0 (= mulflt_~b |mulflt_#in~a|)))) [2020-07-21 22:08:20,637 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 22:08:20,637 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:08:20,637 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:08:20,638 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 22:08:20,638 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 22:08:20,639 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 22:08:20,639 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 22:08:20,639 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 22:08:20,639 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 22:08:20,639 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 22:08:20,639 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 22:08:20,639 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 22:08:20,639 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 22:08:20,640 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 22:08:20,640 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 22:08:20,640 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 22:08:20,640 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (= 0 main_~a~0)) (and (<= (mod main_~zero~0 4294967296) (mod main_~b~0 4294967296)) (= 0 main_~b~0)) (and (<= 1 main_~tmp~2) (<= 1 main_~sb~0)) (and .cse0 (<= (mod main_~b~0 4294967296) 0)) (<= (+ main_~sb~0 1) 0))) [2020-07-21 22:08:20,640 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 22:08:20,640 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 22:08:20,640 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 22:08:20,640 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 22:08:20,641 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 22:08:20,642 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 22:08:20,643 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 22:08:20,663 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,665 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,665 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,666 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,666 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,666 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:08:20 BoogieIcfgContainer [2020-07-21 22:08:20,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:08:20,671 INFO L168 Benchmark]: Toolchain (without parser) took 346809.77 ms. Allocated memory was 138.9 MB in the beginning and 272.1 MB in the end (delta: 133.2 MB). Free memory was 103.5 MB in the beginning and 117.3 MB in the end (delta: -13.8 MB). Peak memory consumption was 164.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:08:20,672 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 22:08:20,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 456.82 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 103.1 MB in the beginning and 179.8 MB in the end (delta: -76.7 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:08:20,673 INFO L168 Benchmark]: Boogie Preprocessor took 42.29 ms. Allocated memory is still 202.9 MB. Free memory was 179.8 MB in the beginning and 177.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:08:20,673 INFO L168 Benchmark]: RCFGBuilder took 624.44 ms. Allocated memory is still 202.9 MB. Free memory was 177.8 MB in the beginning and 152.6 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:08:20,673 INFO L168 Benchmark]: TraceAbstraction took 345666.24 ms. Allocated memory was 202.9 MB in the beginning and 272.1 MB in the end (delta: 69.2 MB). Free memory was 151.9 MB in the beginning and 117.3 MB in the end (delta: 34.6 MB). Peak memory consumption was 148.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:08:20,675 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 456.82 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 103.1 MB in the beginning and 179.8 MB in the end (delta: -76.7 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.29 ms. Allocated memory is still 202.9 MB. Free memory was 179.8 MB in the beginning and 177.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 624.44 ms. Allocated memory is still 202.9 MB. Free memory was 177.8 MB in the beginning and 152.6 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 345666.24 ms. Allocated memory was 202.9 MB in the beginning and 272.1 MB in the end (delta: 69.2 MB). Free memory was 151.9 MB in the beginning and 117.3 MB in the end (delta: 34.6 MB). Peak memory consumption was 148.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 22:08:20,680 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,681 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,681 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,681 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,682 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 22:08:20,682 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] Derived loop invariant: ((((\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296) && 0 == __retres10) || (b == \old(b) && 0 == __retres10)) || ((!(0 == \old(a) % 4294967296) && (\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296)) && a == \old(a))) || ((!(0 == \old(a) % 4294967296) && (\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296)) && b == \old(a)) - 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: 342.1s, OverallIterations: 23, TraceHistogramMax: 24, AutomataDifference: 323.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1623 SDtfs, 2937 SDslu, 7688 SDs, 0 SdLazy, 3311 SolverSat, 393 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 11.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3044 GetRequests, 2704 SyntacticMatches, 13 SemanticMatches, 327 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 318.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 23 MinimizatonAttempts, 736 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 226 PreInvPairs, 769 NumberOfFragments, 175 HoareAnnotationTreeSize, 226 FomulaSimplifications, 7976 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 10480 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 1884 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 2828 ConstructedInterpolants, 9 QuantifiedInterpolants, 597820 SizeOfPredicates, 45 NumberOfNonLiveVariables, 4924 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 31 InterpolantComputations, 12 PerfectInterpolantSequences, 10804/13369 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...