/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:02:32,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:02:32,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:02:32,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:02:32,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:32,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:32,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:32,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:32,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:32,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:32,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:32,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:32,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:32,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:32,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:32,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:32,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:32,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:32,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:32,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:32,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:32,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:32,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:32,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:32,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:02:32,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:02:32,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:02:32,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:02:32,501 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 22:02:32,516 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:32,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:32,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:32,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:32,518 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:32,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:32,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:32,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:32,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:32,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:32,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:32,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:32,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:32,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:32,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:32,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:32,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:32,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:32,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:32,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:32,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:32,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:32,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:32,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:32,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:32,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:32,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:32,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:32,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:32,523 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 22:02:32,823 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:32,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:32,841 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:32,842 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:32,843 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:32,843 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 22:02:32,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d861953/1794b1d1d86743478c6a26aa4c816e4e/FLAG900e05074 [2020-07-21 22:02:33,369 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:33,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 22:02:33,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d861953/1794b1d1d86743478c6a26aa4c816e4e/FLAG900e05074 [2020-07-21 22:02:33,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d861953/1794b1d1d86743478c6a26aa4c816e4e [2020-07-21 22:02:33,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:33,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:33,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:33,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:33,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:33,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:33" (1/1) ... [2020-07-21 22:02:33,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ef5c86 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 22:02:33,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:33" (1/1) ... [2020-07-21 22:02:33,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:33,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:34,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:34,261 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:34,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:34,456 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:34,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:34 WrapperNode [2020-07-21 22:02:34,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:34,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:34,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:34,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:34,473 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 22:02:34,473 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 22:02:34,482 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 22:02:34,482 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 22:02:34,492 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 22:02:34,499 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 22:02:34,501 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 22:02:34,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:34,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:34,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:34,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:34,507 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 22:02:34,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:34,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:34,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 22:02:34,579 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 22:02:34,580 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 22:02:34,580 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 22:02:34,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 22:02:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 22:02:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 22:02:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 22:02:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 22:02:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 22:02:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:35,064 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:35,065 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 22:02:35,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:35 BoogieIcfgContainer [2020-07-21 22:02:35,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:35,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:35,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:35,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:35,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:33" (1/3) ... [2020-07-21 22:02:35,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3800e2cf 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 22:02:35,076 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 22:02:35,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3800e2cf 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 22:02:35,076 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 22:02:35,078 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-21 22:02:35,089 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:35,098 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:35,112 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:35,136 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:35,136 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:35,136 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:35,136 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:35,136 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:35,137 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:35,137 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:35,137 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 22:02:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 22:02:35,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:35,167 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 22:02:35,167 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 22:02:35,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:35,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364253842] [2020-07-21 22:02:35,185 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 22:02:35,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:35,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:02:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:35,410 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 22:02:35,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:35,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364253842] [2020-07-21 22:02:35,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:35,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:35,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309706570] [2020-07-21 22:02:35,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:35,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:35,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:35,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:35,438 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-21 22:02:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:35,585 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-21 22:02:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:35,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-21 22:02:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:35,600 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:02:35,601 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 22:02:35,605 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 22:02:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 22:02:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-21 22:02:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 22:02:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-21 22:02:35,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-21 22:02:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:35,664 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-21 22:02:35,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-21 22:02:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 22:02:35,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:35,668 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 22:02:35,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:35,884 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-21 22:02:35,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:35,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126362862] [2020-07-21 22:02:35,887 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 22:02:35,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:02:35,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:35,997 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 22:02:35,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:35,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126362862] [2020-07-21 22:02:35,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:35,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:35,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620702464] [2020-07-21 22:02:36,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:36,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:36,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:36,004 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-21 22:02:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:36,096 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-21 22:02:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:02:36,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-21 22:02:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:36,099 INFO L225 Difference]: With dead ends: 113 [2020-07-21 22:02:36,099 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 22:02:36,101 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 22:02:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 22:02:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-21 22:02:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 22:02:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-21 22:02:36,116 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-21 22:02:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:36,116 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-21 22:02:36,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-21 22:02:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:02:36,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:36,119 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 22:02:36,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:36,333 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:36,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-21 22:02:36,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:36,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421271235] [2020-07-21 22:02:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:36,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:36,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:02:36,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:36,436 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 22:02:36,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:36,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421271235] [2020-07-21 22:02:36,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:36,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:36,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763716167] [2020-07-21 22:02:36,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:36,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:36,440 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-21 22:02:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:36,546 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-21 22:02:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:02:36,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 22:02:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:36,549 INFO L225 Difference]: With dead ends: 124 [2020-07-21 22:02:36,549 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:02:36,553 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 22:02:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:02:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-21 22:02:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:02:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-21 22:02:36,579 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-21 22:02:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:36,580 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-21 22:02:36,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-21 22:02:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:02:36,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:36,584 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 22:02:36,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:36,796 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-21 22:02:36,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:36,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876006989] [2020-07-21 22:02:36,799 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 22:02:36,852 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:02:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:36,886 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 22:02:36,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:36,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876006989] [2020-07-21 22:02:36,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:36,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:02:36,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120960313] [2020-07-21 22:02:36,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:02:36,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:02:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:02:36,889 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-21 22:02:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:36,962 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-21 22:02:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:36,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 22:02:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:36,964 INFO L225 Difference]: With dead ends: 128 [2020-07-21 22:02:36,964 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 22:02:36,965 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 22:02:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 22:02:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-21 22:02:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 22:02:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-21 22:02:36,976 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-21 22:02:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:36,977 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-21 22:02:36,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:02:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-21 22:02:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 22:02:36,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:36,979 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 22:02:37,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:37,189 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-21 22:02:37,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:37,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025666441] [2020-07-21 22:02:37,191 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 22:02:37,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:37,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:02:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:37,275 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 22:02:37,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:37,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025666441] [2020-07-21 22:02:37,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:37,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:02:37,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645942218] [2020-07-21 22:02:37,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:02:37,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:02:37,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:02:37,278 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-21 22:02:37,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:37,392 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-21 22:02:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:02:37,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-21 22:02:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:37,395 INFO L225 Difference]: With dead ends: 133 [2020-07-21 22:02:37,395 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 22:02:37,396 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 22:02:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 22:02:37,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-21 22:02:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:02:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-21 22:02:37,407 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-21 22:02:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:37,407 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-21 22:02:37,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:02:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-21 22:02:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:02:37,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:37,409 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 22:02:37,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:37,623 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:37,624 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-21 22:02:37,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:37,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419416405] [2020-07-21 22:02:37,626 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 22:02:37,665 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:37,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:37,707 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 22:02:37,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:37,796 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 22:02:37,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419416405] [2020-07-21 22:02:37,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:37,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 22:02:37,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984080458] [2020-07-21 22:02:37,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:02:37,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:02:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:02:37,799 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-21 22:02:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:37,903 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-21 22:02:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:02:37,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-21 22:02:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:37,906 INFO L225 Difference]: With dead ends: 147 [2020-07-21 22:02:37,906 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 22:02:37,907 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 22:02:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 22:02:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-21 22:02:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 22:02:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-21 22:02:37,927 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-21 22:02:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:37,927 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-21 22:02:37,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:02:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-21 22:02:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 22:02:37,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:37,929 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 22:02:38,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:38,144 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:38,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-21 22:02:38,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:38,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930959901] [2020-07-21 22:02:38,146 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 22:02:38,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:38,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:38,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:02:38,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:38,244 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 22:02:38,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:38,369 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 22:02:38,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930959901] [2020-07-21 22:02:38,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:38,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 22:02:38,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099351485] [2020-07-21 22:02:38,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:02:38,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:02:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:02:38,372 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-21 22:02:44,772 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:02:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:44,971 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-21 22:02:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:02:44,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-21 22:02:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:44,974 INFO L225 Difference]: With dead ends: 172 [2020-07-21 22:02:44,974 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 22:02:44,976 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 22:02:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 22:02:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-21 22:02:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:02:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-21 22:02:44,988 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-21 22:02:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:44,989 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-21 22:02:44,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:02:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-21 22:02:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-21 22:02:44,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:44,990 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 22:02:45,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:45,202 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:45,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-21 22:02:45,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:45,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475138476] [2020-07-21 22:02:45,205 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 22:02:45,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:45,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:02:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:45,321 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 22:02:45,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:45,499 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 22:02:45,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475138476] [2020-07-21 22:02:45,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:45,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 22:02:45,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790392097] [2020-07-21 22:02:45,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:02:45,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:02:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:02:45,502 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-21 22:02:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:45,696 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-21 22:02:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:02:45,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-21 22:02:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:45,703 INFO L225 Difference]: With dead ends: 210 [2020-07-21 22:02:45,703 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 22:02:45,704 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 22:02:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 22:02:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-21 22:02:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:02:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-21 22:02:45,740 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-21 22:02:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:45,740 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-21 22:02:45,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:02:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-21 22:02:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 22:02:45,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:45,742 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 22:02:45,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:45,944 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-21 22:02:45,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:45,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010527500] [2020-07-21 22:02:45,946 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 22:02:45,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:02:45,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:46,076 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 22:02:46,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:46,403 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 22:02:46,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010527500] [2020-07-21 22:02:46,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:46,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 22:02:46,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615516703] [2020-07-21 22:02:46,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:02:46,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:02:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:02:46,406 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-21 22:02:55,318 WARN L193 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 22:03:07,960 WARN L193 SmtUtils]: Spent 10.41 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 22:03:23,823 WARN L193 SmtUtils]: Spent 12.42 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 22:03:37,321 WARN L193 SmtUtils]: Spent 12.45 s on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-07-21 22:03:48,226 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 22:03:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:59,029 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-21 22:03:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 22:03:59,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-21 22:03:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:59,031 INFO L225 Difference]: With dead ends: 242 [2020-07-21 22:03:59,032 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 22:03:59,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 72.1s TimeCoverageRelationStatistics Valid=315, Invalid=604, Unknown=11, NotChecked=0, Total=930 [2020-07-21 22:03:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 22:03:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-21 22:03:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-21 22:03:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-21 22:03:59,049 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-21 22:03:59,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:59,050 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-21 22:03:59,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:03:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-21 22:03:59,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 22:03:59,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:59,051 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 22:03:59,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:59,264 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-21 22:03:59,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:59,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306943030] [2020-07-21 22:03:59,266 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 22:03:59,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:59,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:03:59,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:59,485 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 22:03:59,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:00,032 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 22:04:00,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306943030] [2020-07-21 22:04:00,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:00,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 22:04:00,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955999540] [2020-07-21 22:04:00,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:04:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:04:00,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:04:00,037 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-21 22:04:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:00,431 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-21 22:04:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 22:04:00,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-21 22:04:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:00,434 INFO L225 Difference]: With dead ends: 336 [2020-07-21 22:04:00,434 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 22:04:00,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 22:04:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 22:04:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-21 22:04:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-21 22:04:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-21 22:04:00,455 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-21 22:04:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:00,455 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-21 22:04:00,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:04:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-21 22:04:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 22:04:00,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:00,457 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 22:04:00,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:00,671 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:00,671 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-21 22:04:00,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:00,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195569643] [2020-07-21 22:04:00,672 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 22:04:00,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:04:00,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 22:04:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:01,013 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 22:04:01,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:01,977 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 22:04:01,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195569643] [2020-07-21 22:04:01,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:01,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 22:04:01,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078577995] [2020-07-21 22:04:01,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:04:01,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:04:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:04:01,981 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-21 22:04:28,679 WARN L193 SmtUtils]: Spent 16.84 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 22:05:00,059 WARN L193 SmtUtils]: Spent 16.67 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 22:05:21,244 WARN L193 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 22:05:47,744 WARN L193 SmtUtils]: Spent 8.57 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 22:06:05,322 WARN L193 SmtUtils]: Spent 8.37 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 22:06:32,729 WARN L193 SmtUtils]: Spent 10.49 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 22:06:49,708 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:06:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:57,316 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-21 22:06:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 22:06:57,318 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-21 22:06:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:57,321 INFO L225 Difference]: With dead ends: 346 [2020-07-21 22:06:57,322 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 22:06:57,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 169.9s TimeCoverageRelationStatistics Valid=925, Invalid=2231, Unknown=36, NotChecked=0, Total=3192 [2020-07-21 22:06:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 22:06:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-21 22:06:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 22:06:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-21 22:06:57,352 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-21 22:06:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:57,354 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-21 22:06:57,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:06:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-21 22:06:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 22:06:57,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:57,357 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 22:06:57,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:57,572 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-21 22:06:57,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:57,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636472145] [2020-07-21 22:06:57,574 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 22:06:57,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:06:57,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:57,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 22:06:57,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:58,211 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 22:06:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:00,066 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 22:07:00,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636472145] [2020-07-21 22:07:00,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:00,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 22:07:00,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437784616] [2020-07-21 22:07:00,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 22:07:00,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 22:07:00,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 22:07:00,074 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-21 22:07:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:01,436 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-21 22:07:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 22:07:01,437 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-21 22:07:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:01,443 INFO L225 Difference]: With dead ends: 570 [2020-07-21 22:07:01,443 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 22:07:01,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 22:07:01,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 22:07:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-21 22:07:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 22:07:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-21 22:07:01,481 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-21 22:07:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:01,481 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-21 22:07:01,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 22:07:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-21 22:07:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 22:07:01,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:01,483 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 22:07:01,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:01,697 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:01,698 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-21 22:07:01,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:01,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956687111] [2020-07-21 22:07:01,699 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 22:07:01,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:07:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:01,804 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 22:07:01,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:07:01,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956687111] [2020-07-21 22:07:01,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:07:01,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:07:01,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113486296] [2020-07-21 22:07:01,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:07:01,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:07:01,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:07:01,806 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 3 states. [2020-07-21 22:07:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:01,824 INFO L93 Difference]: Finished difference Result 209 states and 323 transitions. [2020-07-21 22:07:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:07:01,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-07-21 22:07:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:01,832 INFO L225 Difference]: With dead ends: 209 [2020-07-21 22:07:01,832 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 22:07:01,833 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 22:07:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 22:07:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 22:07:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 22:07:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 309 transitions. [2020-07-21 22:07:01,846 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 309 transitions. Word has length 122 [2020-07-21 22:07:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:01,846 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 309 transitions. [2020-07-21 22:07:01,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:07:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 309 transitions. [2020-07-21 22:07:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 22:07:01,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:01,848 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 22:07:02,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:02,064 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1044966756, now seen corresponding path program 1 times [2020-07-21 22:07:02,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:02,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189237779] [2020-07-21 22:07:02,066 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 22:07:02,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:07:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:02,189 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 22:07:02,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:07:02,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189237779] [2020-07-21 22:07:02,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:07:02,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:07:02,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329891578] [2020-07-21 22:07:02,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:07:02,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:07:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:07:02,192 INFO L87 Difference]: Start difference. First operand 198 states and 309 transitions. Second operand 4 states. [2020-07-21 22:07:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:02,224 INFO L93 Difference]: Finished difference Result 210 states and 323 transitions. [2020-07-21 22:07:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:07:02,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-07-21 22:07:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:02,228 INFO L225 Difference]: With dead ends: 210 [2020-07-21 22:07:02,229 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 22:07:02,230 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 22:07:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 22:07:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 22:07:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 22:07:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-21 22:07:02,248 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 124 [2020-07-21 22:07:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:02,249 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-21 22:07:02,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:07:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-21 22:07:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 22:07:02,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:02,251 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 22:07:02,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:02,466 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:02,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 1 times [2020-07-21 22:07:02,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:02,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463512042] [2020-07-21 22:07:02,467 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 22:07:02,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:02,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:07:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 22:07:02,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:02,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463512042] [2020-07-21 22:07:02,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:07:02,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 22:07:02,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627799261] [2020-07-21 22:07:02,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:07:02,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:02,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:07:02,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:07:02,802 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 9 states. [2020-07-21 22:07:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:02,954 INFO L93 Difference]: Finished difference Result 232 states and 359 transitions. [2020-07-21 22:07:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:07:02,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2020-07-21 22:07:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:02,957 INFO L225 Difference]: With dead ends: 232 [2020-07-21 22:07:02,957 INFO L226 Difference]: Without dead ends: 227 [2020-07-21 22:07:02,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:07:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-21 22:07:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 214. [2020-07-21 22:07:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-21 22:07:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 333 transitions. [2020-07-21 22:07:02,975 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 333 transitions. Word has length 124 [2020-07-21 22:07:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:02,975 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 333 transitions. [2020-07-21 22:07:02,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:07:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 333 transitions. [2020-07-21 22:07:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 22:07:02,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:02,978 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 22:07:03,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:03,192 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572994, now seen corresponding path program 1 times [2020-07-21 22:07:03,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:03,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785852073] [2020-07-21 22:07:03,194 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 22:07:03,279 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:03,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:07:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:03,316 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 22:07:03,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:07:03,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785852073] [2020-07-21 22:07:03,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:07:03,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 22:07:03,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908964062] [2020-07-21 22:07:03,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:07:03,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:03,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:07:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:07:03,327 INFO L87 Difference]: Start difference. First operand 214 states and 333 transitions. Second operand 6 states. [2020-07-21 22:07:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:03,385 INFO L93 Difference]: Finished difference Result 220 states and 338 transitions. [2020-07-21 22:07:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:07:03,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 22:07:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:03,389 INFO L225 Difference]: With dead ends: 220 [2020-07-21 22:07:03,389 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 22:07:03,390 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 22:07:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 22:07:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-07-21 22:07:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-21 22:07:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 332 transitions. [2020-07-21 22:07:03,437 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 332 transitions. Word has length 126 [2020-07-21 22:07:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:03,438 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 332 transitions. [2020-07-21 22:07:03,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:07:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 332 transitions. [2020-07-21 22:07:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 22:07:03,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:03,442 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 22:07:03,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:03,655 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1476831296, now seen corresponding path program 1 times [2020-07-21 22:07:03,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:03,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142157442] [2020-07-21 22:07:03,658 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 22:07:03,737 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:07:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:03,779 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 22:07:03,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:07:03,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142157442] [2020-07-21 22:07:03,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:07:03,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 22:07:03,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953717044] [2020-07-21 22:07:03,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:07:03,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:03,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:07:03,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:07:03,781 INFO L87 Difference]: Start difference. First operand 214 states and 332 transitions. Second operand 6 states. [2020-07-21 22:07:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:03,840 INFO L93 Difference]: Finished difference Result 231 states and 350 transitions. [2020-07-21 22:07:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:07:03,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 22:07:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:03,844 INFO L225 Difference]: With dead ends: 231 [2020-07-21 22:07:03,844 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 22:07:03,845 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 22:07:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 22:07:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-07-21 22:07:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-21 22:07:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 338 transitions. [2020-07-21 22:07:03,861 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 338 transitions. Word has length 126 [2020-07-21 22:07:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:03,861 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 338 transitions. [2020-07-21 22:07:03,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:07:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 338 transitions. [2020-07-21 22:07:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-21 22:07:03,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:03,864 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:07:04,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:04,080 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1186381896, now seen corresponding path program 1 times [2020-07-21 22:07:04,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:04,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256054015] [2020-07-21 22:07:04,082 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 22:07:04,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:04,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:07:04,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 22:07:04,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 22:07:04,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256054015] [2020-07-21 22:07:04,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:04,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 22:07:04,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139948913] [2020-07-21 22:07:04,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:07:04,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:04,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:07:04,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:07:04,623 INFO L87 Difference]: Start difference. First operand 220 states and 338 transitions. Second operand 15 states. [2020-07-21 22:07:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:04,957 INFO L93 Difference]: Finished difference Result 246 states and 370 transitions. [2020-07-21 22:07:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:07:04,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 127 [2020-07-21 22:07:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:04,962 INFO L225 Difference]: With dead ends: 246 [2020-07-21 22:07:04,962 INFO L226 Difference]: Without dead ends: 229 [2020-07-21 22:07:04,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:07:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-21 22:07:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2020-07-21 22:07:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-21 22:07:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 319 transitions. [2020-07-21 22:07:04,979 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 319 transitions. Word has length 127 [2020-07-21 22:07:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:04,980 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 319 transitions. [2020-07-21 22:07:04,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:07:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 319 transitions. [2020-07-21 22:07:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-21 22:07:04,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:04,982 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 22:07:05,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:05,197 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1914998645, now seen corresponding path program 1 times [2020-07-21 22:07:05,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:05,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591674569] [2020-07-21 22:07:05,199 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 22:07:05,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:05,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:07:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:05,316 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 22:07:05,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:05,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591674569] [2020-07-21 22:07:05,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:07:05,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 22:07:05,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710065259] [2020-07-21 22:07:05,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:07:05,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:05,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:07:05,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:07:05,348 INFO L87 Difference]: Start difference. First operand 210 states and 319 transitions. Second operand 6 states. [2020-07-21 22:07:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:05,413 INFO L93 Difference]: Finished difference Result 215 states and 323 transitions. [2020-07-21 22:07:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:07:05,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-07-21 22:07:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:05,417 INFO L225 Difference]: With dead ends: 215 [2020-07-21 22:07:05,417 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 22:07:05,418 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 22:07:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 22:07:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 22:07:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 22:07:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2020-07-21 22:07:05,433 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 128 [2020-07-21 22:07:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:05,434 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2020-07-21 22:07:05,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:07:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2020-07-21 22:07:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-21 22:07:05,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:05,435 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 22:07:05,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:05,650 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash -412015497, now seen corresponding path program 1 times [2020-07-21 22:07:05,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:05,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056839259] [2020-07-21 22:07:05,652 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 22:07:05,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:05,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:07:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 22:07:05,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:07:05,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056839259] [2020-07-21 22:07:05,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:07:05,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 22:07:05,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749285335] [2020-07-21 22:07:05,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:07:05,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:05,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:07:05,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:07:05,902 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand 8 states. [2020-07-21 22:07:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:06,100 INFO L93 Difference]: Finished difference Result 229 states and 340 transitions. [2020-07-21 22:07:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:07:06,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-07-21 22:07:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:06,104 INFO L225 Difference]: With dead ends: 229 [2020-07-21 22:07:06,104 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 22:07:06,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:07:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 22:07:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-21 22:07:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 22:07:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-07-21 22:07:06,124 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 131 [2020-07-21 22:07:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:06,125 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-07-21 22:07:06,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:07:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-07-21 22:07:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:07:06,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:06,128 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 22:07:06,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:06,344 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-07-21 22:07:06,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:06,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430330518] [2020-07-21 22:07:06,347 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 22:07:06,453 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:06,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:06,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:07:06,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:06,558 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 22:07:06,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:09,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430330518] [2020-07-21 22:07:09,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:07:09,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-21 22:07:09,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703487845] [2020-07-21 22:07:09,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 22:07:09,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:09,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 22:07:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2020-07-21 22:07:09,674 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 7 states. [2020-07-21 22:07:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:09,817 INFO L93 Difference]: Finished difference Result 221 states and 283 transitions. [2020-07-21 22:07:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:07:09,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-07-21 22:07:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:09,820 INFO L225 Difference]: With dead ends: 221 [2020-07-21 22:07:09,820 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 22:07:09,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2020-07-21 22:07:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 22:07:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 22:07:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 22:07:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-21 22:07:09,839 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-21 22:07:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:09,839 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-21 22:07:09,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 22:07:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-21 22:07:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:07:09,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:09,841 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 22:07:10,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:10,054 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-07-21 22:07:10,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:10,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526478699] [2020-07-21 22:07:10,056 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 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 22:07:10,141 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:07:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:10,269 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 22:07:10,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:10,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526478699] [2020-07-21 22:07:10,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:07:10,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 22:07:10,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342078453] [2020-07-21 22:07:10,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:07:10,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:07:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:07:10,573 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 10 states. [2020-07-21 22:07:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:10,787 INFO L93 Difference]: Finished difference Result 224 states and 285 transitions. [2020-07-21 22:07:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:07:10,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 22:07:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:10,796 INFO L225 Difference]: With dead ends: 224 [2020-07-21 22:07:10,796 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 22:07:10,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:07:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 22:07:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 22:07:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 22:07:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-07-21 22:07:10,814 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 135 [2020-07-21 22:07:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:10,815 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-07-21 22:07:10,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:07:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-07-21 22:07:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:07:10,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:10,816 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 22:07:11,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:11,032 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-07-21 22:07:11,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:11,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434687898] [2020-07-21 22:07:11,033 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 22:07:11,119 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:11,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:11,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 22:07:11,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 22:07:11,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:12,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434687898] [2020-07-21 22:07:12,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:07:12,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-21 22:07:12,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108607276] [2020-07-21 22:07:12,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:07:12,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:07:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:07:12,325 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 14 states. [2020-07-21 22:07:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:12,843 INFO L93 Difference]: Finished difference Result 219 states and 276 transitions. [2020-07-21 22:07:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:07:12,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-07-21 22:07:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:12,847 INFO L225 Difference]: With dead ends: 219 [2020-07-21 22:07:12,848 INFO L226 Difference]: Without dead ends: 201 [2020-07-21 22:07:12,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:07:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-21 22:07:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-07-21 22:07:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 22:07:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 257 transitions. [2020-07-21 22:07:12,861 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 257 transitions. Word has length 135 [2020-07-21 22:07:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:12,861 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 257 transitions. [2020-07-21 22:07:12,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:07:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 257 transitions. [2020-07-21 22:07:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:07:12,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:12,863 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:07:13,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:13,077 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-07-21 22:07:13,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:13,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116432884] [2020-07-21 22:07:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:13,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:13,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:13,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:07:13,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-07-21 22:07:13,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:13,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116432884] [2020-07-21 22:07:13,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:07:13,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 22:07:13,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670347964] [2020-07-21 22:07:13,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:07:13,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:13,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:07:13,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:07:13,702 INFO L87 Difference]: Start difference. First operand 201 states and 257 transitions. Second operand 10 states. [2020-07-21 22:07:13,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:13,935 INFO L93 Difference]: Finished difference Result 201 states and 257 transitions. [2020-07-21 22:07:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:07:13,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 22:07:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:13,936 INFO L225 Difference]: With dead ends: 201 [2020-07-21 22:07:13,936 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:07:13,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:07:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:07:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:07:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:07:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:07:13,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 22:07:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:13,939 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:07:13,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:07:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:07:13,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:07:14,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:14,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:07:14,619 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 354 [2020-07-21 22:07:14,738 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 354 [2020-07-21 22:07:14,848 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 354 [2020-07-21 22:07:14,953 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 354 [2020-07-21 22:07:15,070 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 354 [2020-07-21 22:07:15,291 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-07-21 22:07:15,834 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 39 [2020-07-21 22:07:16,745 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 20 [2020-07-21 22:07:16,754 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:07:16,754 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:07:16,754 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 22:07:16,755 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 22:07:16,755 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 22:07:16,755 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 22:07:16,755 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 22:07:16,755 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 22:07:16,755 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (<= base2flt_~e |base2flt_#in~e|) (or (not (= 1 |base2flt_#in~m|)) (< (mod base2flt_~m 4294967296) 16777216)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-21 22:07:16,755 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 22:07:16,756 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 22:07:16,756 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 22:07:16,756 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-21 22:07:16,756 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 22:07:16,756 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 22:07:16,756 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 22:07:16,756 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 22:07:16,756 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 22:07:16,756 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 22:07:16,757 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 22:07:16,757 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 22:07:16,757 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 22:07:16,757 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 22:07:16,757 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 22:07:16,757 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 22:07:16,757 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse2 (= mulflt_~b |mulflt_#in~a|)) (.cse5 (not (= 0 (mod |mulflt_#in~a| 4294967296)))) (.cse4 (= mulflt_~a |mulflt_#in~a|))) (let ((.cse0 (or (and .cse5 .cse2) (and .cse5 .cse4))) (.cse1 (exists ((v_mulflt_~a_50 Int)) (< (mod v_mulflt_~a_50 4294967296) (mod |mulflt_#in~b| 4294967296)))) (.cse3 (= 0 mulflt_~__retres10~1))) (or (and (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)) .cse0 (= mulflt_~b |mulflt_#in~b|) .cse1) (and .cse0 .cse2 .cse1) (and .cse2 .cse3) (and .cse4 (or .cse5 (= 0 (mod mulflt_~b 4294967296))) .cse3)))) [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:07:16,758 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:07:16,758 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 22:07:16,758 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 22:07:16,759 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 22:07:16,759 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 22:07:16,760 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 22:07:16,760 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 22:07:16,761 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 22:07:16,761 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 22:07:16,761 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 22:07:16,761 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 22:07:16,761 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 22:07:16,761 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 22:07:16,762 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 22:07:16,762 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 22:07:16,762 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (or (= 0 main_~zero~0) (= 0 main_~a~0)) [2020-07-21 22:07:16,762 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (<= (+ main_~sa~0 1) 0) (and (<= (mod main_~a~0 4294967296) 0) .cse0) (and (<= 1 main_~sa~0) (<= 1 main_~tmp~2)) (and (= 0 main_~a~0) (<= (mod main_~zero~0 4294967296) (mod main_~a~0 4294967296))) (and .cse0 (= 0 main_~b~0)))) [2020-07-21 22:07:16,762 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 22:07:16,762 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 22:07:16,762 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 22:07:16,763 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 22:07:16,763 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 22:07:16,763 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 22:07:16,763 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 22:07:16,763 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 22:07:16,763 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 22:07:16,763 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 22:07:16,764 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 22:07:16,764 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 22:07:16,764 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 22:07:16,764 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 22:07:16,764 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 22:07:16,765 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 22:07:16,765 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 22:07:16,765 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 22:07:16,766 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 22:07:16,766 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 22:07:16,766 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 22:07:16,766 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 22:07:16,787 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 22:07:16,789 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 22:07:16,790 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 22:07:16,790 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 22:07:16,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:07:16 BoogieIcfgContainer [2020-07-21 22:07:16,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:07:16,796 INFO L168 Benchmark]: Toolchain (without parser) took 283004.04 ms. Allocated memory was 135.3 MB in the beginning and 283.6 MB in the end (delta: 148.4 MB). Free memory was 99.7 MB in the beginning and 164.6 MB in the end (delta: -64.9 MB). Peak memory consumption was 194.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:07:16,796 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:07:16,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.98 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 176.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:07:16,797 INFO L168 Benchmark]: Boogie Preprocessor took 47.61 ms. Allocated memory is still 199.8 MB. Free memory was 176.3 MB in the beginning and 174.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:07:16,798 INFO L168 Benchmark]: RCFGBuilder took 564.09 ms. Allocated memory is still 199.8 MB. Free memory was 174.2 MB in the beginning and 149.6 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:07:16,798 INFO L168 Benchmark]: TraceAbstraction took 281723.37 ms. Allocated memory was 199.8 MB in the beginning and 283.6 MB in the end (delta: 83.9 MB). Free memory was 148.9 MB in the beginning and 164.6 MB in the end (delta: -15.7 MB). Peak memory consumption was 179.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:07:16,800 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 661.98 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 176.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.61 ms. Allocated memory is still 199.8 MB. Free memory was 176.3 MB in the beginning and 174.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 564.09 ms. Allocated memory is still 199.8 MB. Free memory was 174.2 MB in the beginning and 149.6 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 281723.37 ms. Allocated memory was 199.8 MB in the beginning and 283.6 MB in the end (delta: 83.9 MB). Free memory was 148.9 MB in the beginning and 164.6 MB in the end (delta: -15.7 MB). Peak memory consumption was 179.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 22:07:16,806 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 22:07:16,807 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 22:07:16,807 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] [2020-07-21 22:07:16,808 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_50,QUANTIFIED] Derived loop invariant: (((((b % 4294967296 <= \old(a) % 4294967296 && ((!(0 == \old(a) % 4294967296) && b == \old(a)) || (!(0 == \old(a) % 4294967296) && a == \old(a)))) && b == \old(b)) && (\exists v_mulflt_~a_50 : int :: v_mulflt_~a_50 % 4294967296 < \old(b) % 4294967296)) || ((((!(0 == \old(a) % 4294967296) && b == \old(a)) || (!(0 == \old(a) % 4294967296) && a == \old(a))) && b == \old(a)) && (\exists v_mulflt_~a_50 : int :: v_mulflt_~a_50 % 4294967296 < \old(b) % 4294967296))) || (b == \old(a) && 0 == __retres10)) || ((a == \old(a) && (!(0 == \old(a) % 4294967296) || 0 == b % 4294967296)) && 0 == __retres10) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 16777216 <= \old(m) % 4294967296 && \old(e) <= e - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (e <= \old(e) && (!(1 == \old(m)) || m % 4294967296 < 16777216)) && !(\old(m) % 4294967296 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 279.0s, OverallIterations: 24, TraceHistogramMax: 24, AutomataDifference: 259.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1666 SDtfs, 2991 SDslu, 8299 SDs, 0 SdLazy, 3582 SolverSat, 387 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3248 GetRequests, 2869 SyntacticMatches, 18 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 258.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 24 MinimizatonAttempts, 732 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 227 PreInvPairs, 767 NumberOfFragments, 223 HoareAnnotationTreeSize, 227 FomulaSimplifications, 7571 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 18 FomulaSimplificationsInter, 10444 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 2335 NumberOfCodeBlocks, 2022 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 2961 ConstructedInterpolants, 9 QuantifiedInterpolants, 639611 SizeOfPredicates, 58 NumberOfNonLiveVariables, 5276 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 11648/14234 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...