/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:55:53,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:55:53,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:55:53,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:55:53,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:55:53,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:55:53,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:55:53,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:55:53,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:55:53,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:55:53,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:55:53,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:55:53,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:55:53,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:55:53,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:55:53,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:55:53,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:55:53,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:55:53,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:55:53,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:55:53,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:55:53,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:55:53,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:55:53,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:55:53,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:55:53,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:55:53,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:55:53,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:55:53,637 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 12:55:53,662 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:55:53,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:55:53,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:55:53,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:55:53,665 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:55:53,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:55:53,665 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:55:53,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:55:53,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:55:53,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:55:53,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:55:53,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:55:53,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:55:53,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:55:53,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:55:53,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:55:53,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:55:53,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:55:53,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:55:53,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:55:53,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:55:53,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:55:53,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:55:53,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:55:53,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:55:53,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:55:53,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:53,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:55:53,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:55:53,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 -> 2 [2020-07-21 12:55:53,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:55:53,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:55:54,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:55:54,002 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:55:54,002 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:55:54,003 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 12:55:54,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7e1225d/7d2163888ca74882a749cd522d0d027d/FLAG1ecd23ee7 [2020-07-21 12:55:54,571 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:55:54,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 12:55:54,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7e1225d/7d2163888ca74882a749cd522d0d027d/FLAG1ecd23ee7 [2020-07-21 12:55:54,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7e1225d/7d2163888ca74882a749cd522d0d027d [2020-07-21 12:55:54,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:55:54,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:55:54,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:55:54,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:55:54,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:55:54,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:55:54" (1/1) ... [2020-07-21 12:55:54,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7900f2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:54, skipping insertion in model container [2020-07-21 12:55:54,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:55:54" (1/1) ... [2020-07-21 12:55:54,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:55:55,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:55:55,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:55:55,269 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:55:55,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:55:55,428 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:55:55,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55 WrapperNode [2020-07-21 12:55:55,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:55:55,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:55:55,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:55:55,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:55:55,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:55:55,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:55:55,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:55:55,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:55:55,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (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 12:55:55,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:55:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:55:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:55:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 12:55:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 12:55:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 12:55:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:55:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:55:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:55:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 12:55:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:55:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 12:55:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 12:55:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 12:55:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:55:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:55:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:55:56,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:55:56,061 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 12:55:56,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:55:56 BoogieIcfgContainer [2020-07-21 12:55:56,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:55:56,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:55:56,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:55:56,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:55:56,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:55:54" (1/3) ... [2020-07-21 12:55:56,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4bb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:55:56, skipping insertion in model container [2020-07-21 12:55:56,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (2/3) ... [2020-07-21 12:55:56,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4bb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:55:56, skipping insertion in model container [2020-07-21 12:55:56,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:55:56" (3/3) ... [2020-07-21 12:55:56,076 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-21 12:55:56,088 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:55:56,097 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:55:56,111 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:55:56,140 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:55:56,140 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:55:56,140 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:55:56,141 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:55:56,141 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:55:56,141 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:55:56,141 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:55:56,141 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:55:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 12:55:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 12:55:56,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:56,172 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 12:55:56,172 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 12:55:56,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:56,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376505077] [2020-07-21 12:55:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:55:56,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:56,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:56,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:55:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:56,442 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 12:55:56,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:55:56,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376505077] [2020-07-21 12:55:56,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:55:56,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:55:56,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907424542] [2020-07-21 12:55:56,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:55:56,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:55:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:55:56,474 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-21 12:55:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:56,634 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-21 12:55:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:55:56,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-21 12:55:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:56,651 INFO L225 Difference]: With dead ends: 126 [2020-07-21 12:55:56,652 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 12:55:56,657 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 12:55:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 12:55:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-21 12:55:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 12:55:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-21 12:55:56,720 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-21 12:55:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:56,721 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-21 12:55:56,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:55:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-21 12:55:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 12:55:56,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:56,725 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 12:55:56,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:56,940 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-21 12:55:56,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:56,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534282324] [2020-07-21 12:55:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:55:57,008 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:57,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:55:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:57,051 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 12:55:57,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:55:57,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534282324] [2020-07-21 12:55:57,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:55:57,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:55:57,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790016003] [2020-07-21 12:55:57,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:55:57,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:57,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:55:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:55:57,056 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-21 12:55:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:57,160 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-21 12:55:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:55:57,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-21 12:55:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:57,164 INFO L225 Difference]: With dead ends: 113 [2020-07-21 12:55:57,164 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 12:55:57,165 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 12:55:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 12:55:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-21 12:55:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 12:55:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-21 12:55:57,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-21 12:55:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:57,180 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-21 12:55:57,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:55:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-21 12:55:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 12:55:57,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:57,183 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 12:55:57,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:57,399 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-21 12:55:57,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:57,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007311141] [2020-07-21 12:55:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:55:57,455 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:57,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:55:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:57,486 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 12:55:57,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:55:57,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007311141] [2020-07-21 12:55:57,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:55:57,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:55:57,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023066348] [2020-07-21 12:55:57,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:55:57,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:57,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:55:57,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:55:57,489 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-21 12:55:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:57,581 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-21 12:55:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:55:57,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 12:55:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:57,584 INFO L225 Difference]: With dead ends: 124 [2020-07-21 12:55:57,587 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 12:55:57,588 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 12:55:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 12:55:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-21 12:55:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 12:55:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-21 12:55:57,615 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-21 12:55:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:57,619 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-21 12:55:57,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:55:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-21 12:55:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 12:55:57,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:57,625 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 12:55:57,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:57,840 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-21 12:55:57,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:57,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946688988] [2020-07-21 12:55:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:55:57,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:57,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:57,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:55:57,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:57,973 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 12:55:57,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:55:57,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946688988] [2020-07-21 12:55:57,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:55:57,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:55:57,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176713319] [2020-07-21 12:55:57,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:55:57,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:57,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:55:57,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:55:57,979 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-21 12:55:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:58,097 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-21 12:55:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:55:58,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 12:55:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:58,100 INFO L225 Difference]: With dead ends: 128 [2020-07-21 12:55:58,101 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 12:55:58,105 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 12:55:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 12:55:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-21 12:55:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 12:55:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-21 12:55:58,129 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-21 12:55:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:58,130 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-21 12:55:58,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:55:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-21 12:55:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 12:55:58,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:58,136 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 12:55:58,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:58,353 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-21 12:55:58,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:58,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968596230] [2020-07-21 12:55:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:55:58,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:58,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:58,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:55:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:58,437 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 12:55:58,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:55:58,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968596230] [2020-07-21 12:55:58,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:55:58,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:55:58,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481191887] [2020-07-21 12:55:58,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:55:58,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:55:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:55:58,440 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-21 12:55:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:58,588 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-21 12:55:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:55:58,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-21 12:55:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:58,591 INFO L225 Difference]: With dead ends: 133 [2020-07-21 12:55:58,591 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 12:55:58,592 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 12:55:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 12:55:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-21 12:55:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 12:55:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-21 12:55:58,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-21 12:55:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:58,605 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-21 12:55:58,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:55:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-21 12:55:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 12:55:58,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:58,607 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 12:55:58,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:58,821 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:58,822 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-21 12:55:58,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:58,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389516656] [2020-07-21 12:55:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:55:58,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:58,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:55:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:58,925 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 12:55:58,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:55:59,034 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 12:55:59,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389516656] [2020-07-21 12:55:59,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:55:59,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 12:55:59,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091085624] [2020-07-21 12:55:59,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:55:59,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:55:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:55:59,038 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-21 12:55:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:59,184 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-21 12:55:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:55:59,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-21 12:55:59,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:59,189 INFO L225 Difference]: With dead ends: 147 [2020-07-21 12:55:59,189 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 12:55:59,193 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 12:55:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 12:55:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-21 12:55:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 12:55:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-21 12:55:59,225 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-21 12:55:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:59,225 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-21 12:55:59,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:55:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-21 12:55:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 12:55:59,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:59,231 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 12:55:59,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:59,433 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:59,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-21 12:55:59,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:59,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813223432] [2020-07-21 12:55:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:55:59,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:59,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 12:55:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:59,523 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 12:55:59,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:55:59,637 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 12:55:59,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813223432] [2020-07-21 12:55:59,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:55:59,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 12:55:59,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115882049] [2020-07-21 12:55:59,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 12:55:59,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:59,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 12:55:59,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:55:59,640 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-21 12:56:08,127 WARN L193 SmtUtils]: Spent 8.31 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 12:56:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:08,334 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-21 12:56:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:56:08,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-21 12:56:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:08,337 INFO L225 Difference]: With dead ends: 172 [2020-07-21 12:56:08,337 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 12:56:08,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-21 12:56:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 12:56:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-21 12:56:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 12:56:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-21 12:56:08,351 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-21 12:56:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:08,352 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-21 12:56:08,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 12:56:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-21 12:56:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-21 12:56:08,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:08,353 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 12:56:08,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:08,567 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:08,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-21 12:56:08,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:08,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037594731] [2020-07-21 12:56:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:08,614 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:08,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:56:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:08,690 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 12:56:08,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:08,894 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 12:56:08,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037594731] [2020-07-21 12:56:08,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:08,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 12:56:08,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597978668] [2020-07-21 12:56:08,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 12:56:08,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 12:56:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:56:08,897 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-21 12:56:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:09,095 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-21 12:56:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 12:56:09,100 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-21 12:56:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:09,102 INFO L225 Difference]: With dead ends: 210 [2020-07-21 12:56:09,103 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 12:56:09,104 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 12:56:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 12:56:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-21 12:56:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 12:56:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-21 12:56:09,145 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-21 12:56:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:09,145 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-21 12:56:09,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 12:56:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-21 12:56:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 12:56:09,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:09,150 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 12:56:09,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:09,352 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:09,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-21 12:56:09,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:09,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466709052] [2020-07-21 12:56:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:09,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:09,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:56:09,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:09,491 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 12:56:09,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:09,845 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 12:56:09,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466709052] [2020-07-21 12:56:09,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:09,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 12:56:09,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121019692] [2020-07-21 12:56:09,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 12:56:09,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:09,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 12:56:09,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 12:56:09,848 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-21 12:56:29,131 WARN L193 SmtUtils]: Spent 18.75 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 12:56:38,160 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 12:56:53,074 WARN L193 SmtUtils]: Spent 14.57 s on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-21 12:57:05,830 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 12:57:18,703 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 12:57:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:27,461 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-21 12:57:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 12:57:27,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-21 12:57:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:27,467 INFO L225 Difference]: With dead ends: 242 [2020-07-21 12:57:27,467 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 12:57:27,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=322, Invalid=604, Unknown=4, NotChecked=0, Total=930 [2020-07-21 12:57:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 12:57:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-21 12:57:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-21 12:57:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-21 12:57:27,494 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-21 12:57:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:27,495 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-21 12:57:27,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 12:57:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-21 12:57:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 12:57:27,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:27,496 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 12:57:27,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:27,713 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:27,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-21 12:57:27,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:27,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366629349] [2020-07-21 12:57:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:57:27,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:57:27,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 12:57:27,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:27,939 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 12:57:27,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:28,490 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 12:57:28,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366629349] [2020-07-21 12:57:28,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:28,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 12:57:28,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811171078] [2020-07-21 12:57:28,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 12:57:28,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 12:57:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 12:57:28,493 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-21 12:57:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:28,934 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-21 12:57:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 12:57:28,935 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-21 12:57:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:28,939 INFO L225 Difference]: With dead ends: 336 [2020-07-21 12:57:28,940 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 12:57:28,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 12:57:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 12:57:28,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-21 12:57:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-21 12:57:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-21 12:57:28,972 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-21 12:57:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:28,973 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-21 12:57:28,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 12:57:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-21 12:57:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 12:57:28,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:28,975 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 12:57:29,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:29,188 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-21 12:57:29,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:29,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555306835] [2020-07-21 12:57:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:57:29,241 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:57:29,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 12:57:29,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:29,558 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 12:57:29,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:30,577 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 12:57:30,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555306835] [2020-07-21 12:57:30,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:30,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 12:57:30,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073744919] [2020-07-21 12:57:30,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 12:57:30,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:30,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 12:57:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 12:57:30,580 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-21 12:57:50,814 WARN L193 SmtUtils]: Spent 10.47 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 12:58:22,429 WARN L193 SmtUtils]: Spent 20.71 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 12:58:53,665 WARN L193 SmtUtils]: Spent 19.36 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 12:59:19,512 WARN L193 SmtUtils]: Spent 10.51 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 12:59:46,908 WARN L193 SmtUtils]: Spent 14.63 s on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-21 13:00:10,373 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 13:00:35,536 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 13:00:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:51,824 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-21 13:00:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 13:00:51,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-21 13:00:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:51,829 INFO L225 Difference]: With dead ends: 346 [2020-07-21 13:00:51,830 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 13:00:51,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 195.0s TimeCoverageRelationStatistics Valid=916, Invalid=2231, Unknown=45, NotChecked=0, Total=3192 [2020-07-21 13:00:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 13:00:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-21 13:00:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 13:00:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-21 13:00:51,857 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-21 13:00:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:51,859 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-21 13:00:51,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 13:00:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-21 13:00:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 13:00:51,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:51,862 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 13:00:52,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:52,077 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:52,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-21 13:00:52,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:52,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702255161] [2020-07-21 13:00:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:52,138 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:00:52,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:52,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 13:00:52,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:52,720 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 13:00:52,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:54,600 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 13:00:54,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702255161] [2020-07-21 13:00:54,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:54,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 13:00:54,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043513345] [2020-07-21 13:00:54,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 13:00:54,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 13:00:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 13:00:54,604 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-21 13:00:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:55,980 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-21 13:00:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 13:00:55,981 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-21 13:00:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:55,987 INFO L225 Difference]: With dead ends: 570 [2020-07-21 13:00:55,987 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 13:00:55,991 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 13:00:55,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 13:00:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-21 13:00:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 13:00:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-21 13:00:56,026 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-21 13:00:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:56,027 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-21 13:00:56,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 13:00:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-21 13:00:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 13:00:56,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:56,029 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 13:00:56,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:56,243 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:56,244 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-21 13:00:56,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:56,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649040212] [2020-07-21 13:00:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:56,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:56,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:00:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:56,338 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 13:00:56,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:00:56,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649040212] [2020-07-21 13:00:56,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:00:56,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:00:56,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018609784] [2020-07-21 13:00:56,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:00:56,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:56,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:00:56,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:00:56,340 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 3 states. [2020-07-21 13:00:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:56,359 INFO L93 Difference]: Finished difference Result 209 states and 323 transitions. [2020-07-21 13:00:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:00:56,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-07-21 13:00:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:56,363 INFO L225 Difference]: With dead ends: 209 [2020-07-21 13:00:56,363 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 13:00:56,364 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 13:00:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 13:00:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 13:00:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 13:00:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 309 transitions. [2020-07-21 13:00:56,379 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 309 transitions. Word has length 122 [2020-07-21 13:00:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:56,379 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 309 transitions. [2020-07-21 13:00:56,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:00:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 309 transitions. [2020-07-21 13:00:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 13:00:56,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:56,381 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 13:00:56,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:56,597 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1044966756, now seen corresponding path program 1 times [2020-07-21 13:00:56,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:56,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191797030] [2020-07-21 13:00:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:56,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:56,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:00:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:56,705 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 13:00:56,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:00:56,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191797030] [2020-07-21 13:00:56,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:00:56,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:00:56,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005443223] [2020-07-21 13:00:56,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:00:56,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:00:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:00:56,708 INFO L87 Difference]: Start difference. First operand 198 states and 309 transitions. Second operand 4 states. [2020-07-21 13:00:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:56,740 INFO L93 Difference]: Finished difference Result 210 states and 323 transitions. [2020-07-21 13:00:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:00:56,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-07-21 13:00:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:56,742 INFO L225 Difference]: With dead ends: 210 [2020-07-21 13:00:56,743 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 13:00:56,743 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 13:00:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 13:00:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 13:00:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 13:00:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-21 13:00:56,761 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 124 [2020-07-21 13:00:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:56,761 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-21 13:00:56,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:00:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-21 13:00:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 13:00:56,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:56,764 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 13:00:56,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:56,979 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:56,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 1 times [2020-07-21 13:00:56,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:56,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874588421] [2020-07-21 13:00:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:57,058 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:00:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 13:00:57,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:00:57,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874588421] [2020-07-21 13:00:57,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:00:57,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 13:00:57,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742352220] [2020-07-21 13:00:57,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 13:00:57,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 13:00:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 13:00:57,179 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 8 states. [2020-07-21 13:00:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:57,367 INFO L93 Difference]: Finished difference Result 238 states and 363 transitions. [2020-07-21 13:00:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:00:57,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-07-21 13:00:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:57,372 INFO L225 Difference]: With dead ends: 238 [2020-07-21 13:00:57,373 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 13:00:57,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:00:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 13:00:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 213. [2020-07-21 13:00:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-21 13:00:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 328 transitions. [2020-07-21 13:00:57,391 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 328 transitions. Word has length 124 [2020-07-21 13:00:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:57,392 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 328 transitions. [2020-07-21 13:00:57,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 13:00:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 328 transitions. [2020-07-21 13:00:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 13:00:57,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:57,394 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 13:00:57,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:57,608 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-07-21 13:00:57,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:57,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513770955] [2020-07-21 13:00:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:57,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:00:57,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:00:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:57,811 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 13:00:57,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:00:57,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513770955] [2020-07-21 13:00:57,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:00:57,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 13:00:57,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399744991] [2020-07-21 13:00:57,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:00:57,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:00:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:00:57,813 INFO L87 Difference]: Start difference. First operand 213 states and 328 transitions. Second operand 7 states. [2020-07-21 13:00:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:58,024 INFO L93 Difference]: Finished difference Result 233 states and 354 transitions. [2020-07-21 13:00:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:00:58,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-07-21 13:00:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:58,028 INFO L225 Difference]: With dead ends: 233 [2020-07-21 13:00:58,029 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 13:00:58,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:00:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 13:00:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 216. [2020-07-21 13:00:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 13:00:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 331 transitions. [2020-07-21 13:00:58,046 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 331 transitions. Word has length 124 [2020-07-21 13:00:58,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:58,046 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 331 transitions. [2020-07-21 13:00:58,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:00:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 331 transitions. [2020-07-21 13:00:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 13:00:58,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:58,049 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 13:00:58,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:58,262 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-07-21 13:00:58,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:58,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229700461] [2020-07-21 13:00:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:58,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 13:00:58,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:58,372 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 13:00:58,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:00:58,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229700461] [2020-07-21 13:00:58,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:00:58,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 13:00:58,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392328366] [2020-07-21 13:00:58,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:00:58,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:58,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:00:58,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:00:58,374 INFO L87 Difference]: Start difference. First operand 216 states and 331 transitions. Second operand 6 states. [2020-07-21 13:00:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:58,443 INFO L93 Difference]: Finished difference Result 222 states and 336 transitions. [2020-07-21 13:00:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:00:58,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 13:00:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:58,447 INFO L225 Difference]: With dead ends: 222 [2020-07-21 13:00:58,447 INFO L226 Difference]: Without dead ends: 216 [2020-07-21 13:00:58,449 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 13:00:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-21 13:00:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-07-21 13:00:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 13:00:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 330 transitions. [2020-07-21 13:00:58,466 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 330 transitions. Word has length 126 [2020-07-21 13:00:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:58,467 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 330 transitions. [2020-07-21 13:00:58,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:00:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 330 transitions. [2020-07-21 13:00:58,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 13:00:58,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:58,471 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 13:00:58,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:58,686 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:58,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-21 13:00:58,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:58,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887027994] [2020-07-21 13:00:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:58,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:58,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:00:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:58,820 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 13:00:58,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:00:58,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887027994] [2020-07-21 13:00:58,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:00:58,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 13:00:58,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012412790] [2020-07-21 13:00:58,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:00:58,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:58,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:00:58,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:00:58,828 INFO L87 Difference]: Start difference. First operand 216 states and 330 transitions. Second operand 6 states. [2020-07-21 13:00:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:58,899 INFO L93 Difference]: Finished difference Result 230 states and 344 transitions. [2020-07-21 13:00:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:00:58,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 13:00:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:58,903 INFO L225 Difference]: With dead ends: 230 [2020-07-21 13:00:58,903 INFO L226 Difference]: Without dead ends: 212 [2020-07-21 13:00:58,904 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 13:00:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-21 13:00:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2020-07-21 13:00:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-21 13:00:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 320 transitions. [2020-07-21 13:00:58,922 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 320 transitions. Word has length 126 [2020-07-21 13:00:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:58,922 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 320 transitions. [2020-07-21 13:00:58,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:00:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 320 transitions. [2020-07-21 13:00:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-21 13:00:58,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:58,926 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 13:00:59,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:59,141 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1043468215, now seen corresponding path program 1 times [2020-07-21 13:00:59,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:59,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105123577] [2020-07-21 13:00:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:59,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:59,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 13:00:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-21 13:00:59,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:59,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105123577] [2020-07-21 13:00:59,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:00:59,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 13:00:59,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025855543] [2020-07-21 13:00:59,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:00:59,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:00:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:00:59,409 INFO L87 Difference]: Start difference. First operand 211 states and 320 transitions. Second operand 10 states. [2020-07-21 13:00:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:59,570 INFO L93 Difference]: Finished difference Result 248 states and 365 transitions. [2020-07-21 13:00:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:00:59,572 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 128 [2020-07-21 13:00:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:59,574 INFO L225 Difference]: With dead ends: 248 [2020-07-21 13:00:59,574 INFO L226 Difference]: Without dead ends: 208 [2020-07-21 13:00:59,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:00:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-21 13:00:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-07-21 13:00:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 13:00:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2020-07-21 13:00:59,596 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 128 [2020-07-21 13:00:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:59,597 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2020-07-21 13:00:59,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:00:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2020-07-21 13:00:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-21 13:00:59,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:59,598 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2020-07-21 13:00:59,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:59,812 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-07-21 13:00:59,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:59,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472618318] [2020-07-21 13:00:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:59,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:59,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:00:59,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:01:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-07-21 13:01:00,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:01:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-07-21 13:01:00,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472618318] [2020-07-21 13:01:00,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:01:00,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 13:01:00,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205454828] [2020-07-21 13:01:00,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:01:00,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:01:00,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:01:00,423 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand 15 states. [2020-07-21 13:01:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:01:00,714 INFO L93 Difference]: Finished difference Result 234 states and 347 transitions. [2020-07-21 13:01:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:01:00,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 131 [2020-07-21 13:01:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:01:00,718 INFO L225 Difference]: With dead ends: 234 [2020-07-21 13:01:00,718 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 13:01:00,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 246 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 13:01:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 13:01:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2020-07-21 13:01:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 13:01:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-21 13:01:00,740 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 131 [2020-07-21 13:01:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:01:00,740 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-21 13:01:00,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:01:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-21 13:01:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 13:01:00,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:01:00,743 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 13:01:00,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:00,956 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:01:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:01:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-07-21 13:01:00,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:01:00,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228628527] [2020-07-21 13:01:00,958 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:01:02,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:01:02,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:01:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:01:02,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:01:03,025 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 13:01:03,054 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 13:01:03,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:01:04,797 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_mulflt_~b_51 Int)) (<= (mod v_mulflt_~b_51 4294967296) (mod c_main_~a~0 4294967296))) is different from false [2020-07-21 13:01:04,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228628527] [2020-07-21 13:01:04,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:01:04,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 13:01:04,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846536944] [2020-07-21 13:01:04,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 13:01:04,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:04,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 13:01:04,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=44, Unknown=1, NotChecked=12, Total=72 [2020-07-21 13:01:04,803 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 8 states. [2020-07-21 13:01:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:01:13,668 INFO L93 Difference]: Finished difference Result 237 states and 302 transitions. [2020-07-21 13:01:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:01:13,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-21 13:01:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:01:13,674 INFO L225 Difference]: With dead ends: 237 [2020-07-21 13:01:13,674 INFO L226 Difference]: Without dead ends: 227 [2020-07-21 13:01:13,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=19, Invalid=56, Unknown=1, NotChecked=14, Total=90 [2020-07-21 13:01:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-21 13:01:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 221. [2020-07-21 13:01:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 13:01:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 286 transitions. [2020-07-21 13:01:13,692 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 286 transitions. Word has length 135 [2020-07-21 13:01:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:01:13,692 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 286 transitions. [2020-07-21 13:01:13,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 13:01:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 286 transitions. [2020-07-21 13:01:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 13:01:13,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:01:13,694 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 13:01:13,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:13,895 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:01:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:01:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-21 13:01:13,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:01:13,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355192964] [2020-07-21 13:01:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:01:14,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:01:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:01:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:01:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:01:14,179 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 13:01:14,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:01:14,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355192964] [2020-07-21 13:01:14,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:01:14,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 13:01:14,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233268620] [2020-07-21 13:01:14,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:01:14,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:01:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:01:14,496 INFO L87 Difference]: Start difference. First operand 221 states and 286 transitions. Second operand 9 states. [2020-07-21 13:01:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:01:14,697 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2020-07-21 13:01:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:01:14,697 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-21 13:01:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:01:14,699 INFO L225 Difference]: With dead ends: 221 [2020-07-21 13:01:14,699 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:01:14,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:01:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:01:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:01:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:01:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:01:14,702 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 13:01:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:01:14,702 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:01:14,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:01:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:01:14,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:01:14,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:14,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:01:15,379 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 354 [2020-07-21 13:01:15,794 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 354 [2020-07-21 13:01:16,015 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-07-21 13:01:28,392 WARN L193 SmtUtils]: Spent 12.37 s on a formula simplification. DAG size of input: 105 DAG size of output: 40 [2020-07-21 13:01:29,546 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 904 DAG size of output: 20 [2020-07-21 13:01:29,646 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 13:01:29,646 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:01:29,646 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 13:01:29,647 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 13:01:29,647 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 13:01:29,647 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 13:01:29,647 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 13:01:29,647 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 13:01:29,647 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (or (< (mod base2flt_~m 4294967296) 16777216) (not (= 1 |base2flt_#in~m|))) (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-21 13:01:29,647 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 13:01:29,648 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 13:01:29,648 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 13:01:29,648 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-21 13:01:29,648 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 13:01:29,648 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-21 13:01:29,648 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 13:01:29,648 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 13:01:29,648 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 13:01:29,648 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 13:01:29,649 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 13:01:29,649 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 13:01:29,649 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 13:01:29,649 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 13:01:29,649 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 13:01:29,649 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 13:01:29,649 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= mulflt_~a |mulflt_#in~a|))) (let ((.cse2 (= mulflt_~b |mulflt_#in~b|)) (.cse0 (not (= 0 (mod |mulflt_#in~b| 4294967296)))) (.cse3 (let ((.cse5 (not (= 0 (mod |mulflt_#in~a| 4294967296))))) (or (and (= mulflt_~b |mulflt_#in~a|) .cse5) (and .cse1 .cse5)))) (.cse4 (= 0 mulflt_~__retres10~1))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse2 .cse4) (and .cse0 (exists ((v_mulflt_~b_46 Int)) (< (mod |mulflt_#in~a| 4294967296) (mod v_mulflt_~b_46 4294967296))) .cse3) (and .cse4 (exists ((v_mulflt_~a_34 Int)) (< (mod v_mulflt_~a_34 4294967296) (mod |mulflt_#in~b| 4294967296))))))) [2020-07-21 13:01:29,650 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 13:01:29,650 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:01:29,650 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 13:01:29,650 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:01:29,650 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:01:29,650 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 13:01:29,650 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 13:01:29,650 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 13:01:29,650 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 13:01:29,651 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 13:01:29,651 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 13:01:29,651 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 13:01:29,651 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 13:01:29,651 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 13:01:29,651 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 13:01:29,651 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 13:01:29,651 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 13:01:29,651 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 13:01:29,652 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 13:01:29,652 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 13:01:29,652 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (<= (mod main_~zero~0 4294967296) (mod main_~b~0 4294967296)) (= 0 main_~tmp___0~0) (<= (mod main_~b~0 4294967296) (mod main_~zero~0 4294967296)) (= 0 main_~tmp___1~0)) [2020-07-21 13:01:29,652 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 13:01:29,652 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 13:01:29,652 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (or (and (<= 1 main_~tmp~2) (<= 1 main_~sb~0)) (<= (+ main_~sb~0 1) 0) (and (= 0 main_~zero~0) (<= (mod main_~b~0 4294967296) (mod main_~zero~0 4294967296))) (and (= 0 main_~b~0) (<= (mod main_~zero~0 4294967296) (mod main_~b~0 4294967296)))) [2020-07-21 13:01:29,652 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 13:01:29,653 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 13:01:29,653 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 13:01:29,653 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 13:01:29,653 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 13:01:29,653 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 13:01:29,653 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 13:01:29,653 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 13:01:29,653 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 13:01:29,654 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 13:01:29,655 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 13:01:29,655 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 13:01:29,655 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 13:01:29,655 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 13:01:29,672 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~b_46,QUANTIFIED] [2020-07-21 13:01:29,674 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 13:01:29,675 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~b_46,QUANTIFIED] [2020-07-21 13:01:29,676 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 13:01:29,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:01:29 BoogieIcfgContainer [2020-07-21 13:01:29,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:01:29,681 INFO L168 Benchmark]: Toolchain (without parser) took 334737.72 ms. Allocated memory was 145.2 MB in the beginning and 259.5 MB in the end (delta: 114.3 MB). Free memory was 102.6 MB in the beginning and 120.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 151.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:01:29,682 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 13:01:29,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 483.00 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 102.2 MB in the beginning and 179.0 MB in the end (delta: -76.8 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-07-21 13:01:29,683 INFO L168 Benchmark]: Boogie Preprocessor took 45.42 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 177.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:01:29,684 INFO L168 Benchmark]: RCFGBuilder took 590.63 ms. Allocated memory is still 201.3 MB. Free memory was 177.0 MB in the beginning and 151.9 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:01:29,684 INFO L168 Benchmark]: TraceAbstraction took 333612.18 ms. Allocated memory was 201.3 MB in the beginning and 259.5 MB in the end (delta: 58.2 MB). Free memory was 151.3 MB in the beginning and 120.1 MB in the end (delta: 31.2 MB). Peak memory consumption was 143.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:01:29,687 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 483.00 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 102.2 MB in the beginning and 179.0 MB in the end (delta: -76.8 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.42 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 177.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 590.63 ms. Allocated memory is still 201.3 MB. Free memory was 177.0 MB in the beginning and 151.9 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 333612.18 ms. Allocated memory was 201.3 MB in the beginning and 259.5 MB in the end (delta: 58.2 MB). Free memory was 151.3 MB in the beginning and 120.1 MB in the end (delta: 31.2 MB). Peak memory consumption was 143.8 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_~b_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~b_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 13:01:29,694 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~b_46,QUANTIFIED] [2020-07-21 13:01:29,695 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] [2020-07-21 13:01:29,695 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~b_46,QUANTIFIED] [2020-07-21 13:01:29,695 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_34,QUANTIFIED] Derived loop invariant: (((((!(0 == \old(b) % 4294967296) && a == \old(a)) && b == \old(b)) && ((b == \old(a) && !(0 == \old(a) % 4294967296)) || (a == \old(a) && !(0 == \old(a) % 4294967296)))) || (b == \old(b) && 0 == __retres10)) || ((!(0 == \old(b) % 4294967296) && (\exists v_mulflt_~b_46 : int :: \old(a) % 4294967296 < v_mulflt_~b_46 % 4294967296)) && ((b == \old(a) && !(0 == \old(a) % 4294967296)) || (a == \old(a) && !(0 == \old(a) % 4294967296))))) || (0 == __retres10 && (\exists v_mulflt_~a_34 : int :: v_mulflt_~a_34 % 4294967296 < \old(b) % 4294967296)) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((m % 4294967296 < 16777216 || !(1 == \old(m))) && !(\old(m) % 4294967296 <= 0)) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 318.7s, OverallIterations: 22, TraceHistogramMax: 24, AutomataDifference: 300.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1575 SDtfs, 2953 SDslu, 7375 SDs, 0 SdLazy, 3346 SolverSat, 384 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 21.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2910 GetRequests, 2572 SyntacticMatches, 15 SemanticMatches, 323 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 284.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=21, 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, 22 MinimizatonAttempts, 737 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 225 PreInvPairs, 779 NumberOfFragments, 218 HoareAnnotationTreeSize, 225 FomulaSimplifications, 8131 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 18 FomulaSimplificationsInter, 10372 FormulaSimplificationTreeSizeReductionInter, 13.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 2062 NumberOfCodeBlocks, 1609 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 2694 ConstructedInterpolants, 12 QuantifiedInterpolants, 583190 SizeOfPredicates, 40 NumberOfNonLiveVariables, 4762 ConjunctsInSsa, 237 ConjunctsInUnsatCore, 30 InterpolantComputations, 11 PerfectInterpolantSequences, 9942/12507 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...