/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:55:17,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:55:17,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:55:17,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:55:17,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:55:17,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:55:17,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:55:17,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:55:17,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:55:17,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:55:17,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:55:17,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:55:17,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:55:17,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:55:17,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:55:17,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:55:17,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:55:17,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:55:17,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:55:17,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:55:17,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:55:17,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:55:17,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:55:17,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:55:17,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:55:17,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:55:17,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:55:17,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:55:17,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:55:17,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:55:17,614 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:55:17,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:55:17,615 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:55:17,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:55:17,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:55:17,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:55:17,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:55:17,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:55:17,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:55:17,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:55:17,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:55:17,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:55:17,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:55:17,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:55:17,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:55:17,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:55:17,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:55:17,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:55:17,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:55:17,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:55:17,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:55:17,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:55:17,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:17,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:55:17,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:55:17,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:55:17,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:55:17,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:55:17,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:55:17,970 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:55:17,972 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:55:17,974 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-20 17:55:18,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4354ca379/e77d5d50b3fc486eb42ce7ed1bfb33b0/FLAG2e9961979 [2020-07-20 17:55:18,476 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:55:18,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-20 17:55:18,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4354ca379/e77d5d50b3fc486eb42ce7ed1bfb33b0/FLAG2e9961979 [2020-07-20 17:55:18,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4354ca379/e77d5d50b3fc486eb42ce7ed1bfb33b0 [2020-07-20 17:55:18,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:55:18,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:55:18,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:55:18,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:55:18,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:55:18,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:18" (1/1) ... [2020-07-20 17:55:18,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38342db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:18, skipping insertion in model container [2020-07-20 17:55:18,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:18" (1/1) ... [2020-07-20 17:55:18,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:55:18,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:55:19,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:55:19,088 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:55:19,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:55:19,124 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:55:19,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19 WrapperNode [2020-07-20 17:55:19,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:55:19,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:55:19,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:55:19,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:55:19,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... [2020-07-20 17:55:19,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... [2020-07-20 17:55:19,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... [2020-07-20 17:55:19,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... [2020-07-20 17:55:19,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... [2020-07-20 17:55:19,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... [2020-07-20 17:55:19,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... [2020-07-20 17:55:19,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:55:19,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:55:19,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:55:19,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:55:19,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:55:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:55:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:55:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:55:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:55:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:55:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:55:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:55:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:55:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:55:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:55:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:55:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:55:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:55:19,523 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:55:19,523 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:55:19,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:55:19 BoogieIcfgContainer [2020-07-20 17:55:19,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:55:19,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:55:19,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:55:19,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:55:19,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:55:18" (1/3) ... [2020-07-20 17:55:19,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c85879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:55:19, skipping insertion in model container [2020-07-20 17:55:19,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:19" (2/3) ... [2020-07-20 17:55:19,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c85879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:55:19, skipping insertion in model container [2020-07-20 17:55:19,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:55:19" (3/3) ... [2020-07-20 17:55:19,536 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-07-20 17:55:19,547 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:55:19,555 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:55:19,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:55:19,616 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:55:19,617 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:55:19,617 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:55:19,617 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:55:19,618 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:55:19,618 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:55:19,618 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:55:19,618 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:55:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 17:55:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:55:19,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:19,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:19,654 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-07-20 17:55:19,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:19,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347879851] [2020-07-20 17:55:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:19,737 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:55:19,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:55:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:19,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:55:19,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347879851] [2020-07-20 17:55:19,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:55:19,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:55:19,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982609942] [2020-07-20 17:55:19,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:55:19,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:55:19,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:55:19,790 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-20 17:55:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:19,815 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-07-20 17:55:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:55:19,817 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-20 17:55:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:19,825 INFO L225 Difference]: With dead ends: 61 [2020-07-20 17:55:19,825 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 17:55:19,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:55:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 17:55:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 17:55:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 17:55:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-07-20 17:55:19,872 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-07-20 17:55:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:19,873 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-07-20 17:55:19,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:55:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-07-20 17:55:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 17:55:19,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:19,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:20,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:20,089 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-07-20 17:55:20,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:20,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436347644] [2020-07-20 17:55:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:20,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:20,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:55:20,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:20,161 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:20,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:55:20,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436347644] [2020-07-20 17:55:20,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:55:20,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:55:20,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187545474] [2020-07-20 17:55:20,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:55:20,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:55:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:55:20,194 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-07-20 17:55:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:20,305 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-20 17:55:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:55:20,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 17:55:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:20,307 INFO L225 Difference]: With dead ends: 35 [2020-07-20 17:55:20,308 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 17:55:20,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:55:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 17:55:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 17:55:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:55:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-07-20 17:55:20,321 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-07-20 17:55:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:20,322 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-07-20 17:55:20,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:55:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-20 17:55:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:55:20,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:20,324 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:20,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:20,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:20,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-07-20 17:55:20,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:20,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534079185] [2020-07-20 17:55:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:20,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:20,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:55:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:20,614 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:20,616 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:20,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:55:20,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534079185] [2020-07-20 17:55:20,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:55:20,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:55:20,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013906743] [2020-07-20 17:55:20,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:55:20,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:55:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:55:20,637 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-07-20 17:55:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:20,749 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-20 17:55:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:55:20,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 17:55:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:20,752 INFO L225 Difference]: With dead ends: 48 [2020-07-20 17:55:20,752 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 17:55:20,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:55:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 17:55:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-20 17:55:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 17:55:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-07-20 17:55:20,766 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-07-20 17:55:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:20,766 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-07-20 17:55:20,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:55:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-07-20 17:55:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:55:20,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:20,768 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:20,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:20,983 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-07-20 17:55:20,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:20,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932476162] [2020-07-20 17:55:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:21,025 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:55:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:21,050 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 17:55:21,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:55:21,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932476162] [2020-07-20 17:55:21,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:55:21,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:55:21,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532861318] [2020-07-20 17:55:21,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:55:21,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:55:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:55:21,088 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-07-20 17:55:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:21,188 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-07-20 17:55:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:55:21,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 17:55:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:21,191 INFO L225 Difference]: With dead ends: 55 [2020-07-20 17:55:21,191 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 17:55:21,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:55:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 17:55:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-20 17:55:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 17:55:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-07-20 17:55:21,202 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-07-20 17:55:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:21,203 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-07-20 17:55:21,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:55:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-07-20 17:55:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:55:21,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:21,205 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:21,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:21,418 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:21,418 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-07-20 17:55:21,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:21,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038490237] [2020-07-20 17:55:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:21,455 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:21,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:21,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:55:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:21,499 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:21,500 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 17:55:21,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:55:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038490237] [2020-07-20 17:55:21,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:55:21,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:55:21,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714837993] [2020-07-20 17:55:21,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:55:21,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:55:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:55:21,518 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-07-20 17:55:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:21,652 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-20 17:55:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:55:21,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 17:55:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:21,655 INFO L225 Difference]: With dead ends: 70 [2020-07-20 17:55:21,655 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 17:55:21,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:55:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 17:55:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-20 17:55:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 17:55:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-20 17:55:21,668 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-07-20 17:55:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:21,669 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-20 17:55:21,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:55:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-20 17:55:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:55:21,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:21,671 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:21,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:21,884 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-07-20 17:55:21,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:21,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909651298] [2020-07-20 17:55:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:21,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:21,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:21,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:55:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:21,956 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:21,961 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 17:55:21,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:55:21,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909651298] [2020-07-20 17:55:21,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:55:21,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 17:55:21,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913860339] [2020-07-20 17:55:21,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:55:21,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:21,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:55:21,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:55:21,985 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-07-20 17:55:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:22,128 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-07-20 17:55:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:55:22,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-20 17:55:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:22,130 INFO L225 Difference]: With dead ends: 72 [2020-07-20 17:55:22,130 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 17:55:22,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:55:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 17:55:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-07-20 17:55:22,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 17:55:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-07-20 17:55:22,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-07-20 17:55:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:22,142 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-07-20 17:55:22,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:55:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-07-20 17:55:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 17:55:22,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:22,144 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2020-07-20 17:55:22,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:22,351 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-07-20 17:55:22,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:22,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269170849] [2020-07-20 17:55:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:22,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:22,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 17:55:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:22,511 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:55:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 17:55:22,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:22,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 17:55:22,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269170849] [2020-07-20 17:55:22,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:22,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-20 17:55:22,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605493281] [2020-07-20 17:55:22,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:55:22,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:55:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:55:22,670 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 13 states. [2020-07-20 17:55:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:23,145 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-07-20 17:55:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 17:55:23,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-07-20 17:55:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:23,148 INFO L225 Difference]: With dead ends: 110 [2020-07-20 17:55:23,148 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 17:55:23,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-07-20 17:55:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 17:55:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-20 17:55:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 17:55:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-07-20 17:55:23,165 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 56 [2020-07-20 17:55:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:23,165 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-07-20 17:55:23,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:55:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-07-20 17:55:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 17:55:23,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:23,167 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:23,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:23,382 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-07-20 17:55:23,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:23,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747128718] [2020-07-20 17:55:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:23,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:23,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:23,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:55:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:23,477 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:23,478 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 17:55:23,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:23,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 17:55:23,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747128718] [2020-07-20 17:55:23,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:23,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-20 17:55:23,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179860942] [2020-07-20 17:55:23,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 17:55:23,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 17:55:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:55:23,582 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 12 states. [2020-07-20 17:55:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:23,786 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-07-20 17:55:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:55:23,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-07-20 17:55:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:23,791 INFO L225 Difference]: With dead ends: 93 [2020-07-20 17:55:23,791 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 17:55:23,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:55:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 17:55:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-07-20 17:55:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 17:55:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-07-20 17:55:23,806 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 58 [2020-07-20 17:55:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:23,806 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-07-20 17:55:23,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 17:55:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-07-20 17:55:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 17:55:23,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:23,808 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:24,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:24,022 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:24,023 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-07-20 17:55:24,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:24,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922431965] [2020-07-20 17:55:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:24,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:24,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 17:55:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:24,201 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:24,202 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 17:55:24,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:24,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 17:55:24,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922431965] [2020-07-20 17:55:24,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:24,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-20 17:55:24,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39183488] [2020-07-20 17:55:24,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 17:55:24,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:24,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 17:55:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:55:24,389 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states. [2020-07-20 17:55:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:24,777 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-07-20 17:55:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 17:55:24,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-07-20 17:55:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:24,779 INFO L225 Difference]: With dead ends: 112 [2020-07-20 17:55:24,780 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 17:55:24,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2020-07-20 17:55:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 17:55:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-07-20 17:55:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 17:55:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-07-20 17:55:24,793 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 83 [2020-07-20 17:55:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:24,794 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-07-20 17:55:24,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 17:55:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-07-20 17:55:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 17:55:24,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:24,796 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:25,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:25,010 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash 314554042, now seen corresponding path program 2 times [2020-07-20 17:55:25,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:25,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549541013] [2020-07-20 17:55:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:25,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 17:55:25,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:25,255 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:55:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 17:55:25,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:25,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:25,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:25,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 17:55:25,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549541013] [2020-07-20 17:55:25,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:25,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-07-20 17:55:25,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674782619] [2020-07-20 17:55:25,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 17:55:25,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:25,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 17:55:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-07-20 17:55:25,591 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 21 states. [2020-07-20 17:55:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:26,567 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-07-20 17:55:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 17:55:26,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-07-20 17:55:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:26,570 INFO L225 Difference]: With dead ends: 171 [2020-07-20 17:55:26,570 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 17:55:26,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 17:55:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 17:55:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-07-20 17:55:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-20 17:55:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2020-07-20 17:55:26,589 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 106 [2020-07-20 17:55:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:26,590 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2020-07-20 17:55:26,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 17:55:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2020-07-20 17:55:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 17:55:26,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:26,592 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:26,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:26,805 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:26,805 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-07-20 17:55:26,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:26,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532261585] [2020-07-20 17:55:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:26,847 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:26,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:26,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 17:55:26,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:27,005 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:27,006 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 17:55:27,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:27,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:27,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:27,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:27,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:27,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 17:55:27,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532261585] [2020-07-20 17:55:27,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:27,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-20 17:55:27,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24209959] [2020-07-20 17:55:27,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 17:55:27,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 17:55:27,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-07-20 17:55:27,310 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand 23 states. [2020-07-20 17:55:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:27,988 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2020-07-20 17:55:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 17:55:27,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-07-20 17:55:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:27,993 INFO L225 Difference]: With dead ends: 154 [2020-07-20 17:55:27,993 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 17:55:27,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 17:55:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 17:55:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-07-20 17:55:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 17:55:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-07-20 17:55:28,019 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 108 [2020-07-20 17:55:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:28,022 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-07-20 17:55:28,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 17:55:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-07-20 17:55:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-20 17:55:28,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:28,025 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:28,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:28,238 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:28,238 INFO L82 PathProgramCache]: Analyzing trace with hash 335068695, now seen corresponding path program 4 times [2020-07-20 17:55:28,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:28,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182801947] [2020-07-20 17:55:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:28,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 17:55:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:28,622 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:28,622 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 17:55:28,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:28,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:28,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:28,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:28,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:28,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:29,033 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 17:55:29,037 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 17:55:29,111 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:55:29,113 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 17:55:29,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:29,125 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:55:29,125 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 17:55:29,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:29,167 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 17:55:29,168 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 17:55:29,168 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 17:55:29,174 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 17:55:29,175 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 17:55:29,176 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 17:55:29,280 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 17:55:29,281 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 17:55:29,281 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 17:55:29,286 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 17:55:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 17:55:29,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182801947] [2020-07-20 17:55:29,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:29,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2020-07-20 17:55:29,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982757813] [2020-07-20 17:55:29,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 17:55:29,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:29,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 17:55:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 17:55:29,401 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 35 states. [2020-07-20 17:55:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:31,743 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2020-07-20 17:55:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 17:55:31,744 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 158 [2020-07-20 17:55:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:31,747 INFO L225 Difference]: With dead ends: 202 [2020-07-20 17:55:31,747 INFO L226 Difference]: Without dead ends: 200 [2020-07-20 17:55:31,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=3181, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 17:55:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-20 17:55:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2020-07-20 17:55:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-20 17:55:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2020-07-20 17:55:31,769 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 158 [2020-07-20 17:55:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:31,771 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2020-07-20 17:55:31,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 17:55:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2020-07-20 17:55:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-20 17:55:31,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:31,777 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:31,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:31,992 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash 254282874, now seen corresponding path program 3 times [2020-07-20 17:55:31,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:31,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10711912] [2020-07-20 17:55:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:32,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:32,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 17:55:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:32,435 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:55:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 17:55:32,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:32,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:32,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:32,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:33,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:33,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:33,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 17:55:33,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10711912] [2020-07-20 17:55:33,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:33,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2020-07-20 17:55:33,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262538726] [2020-07-20 17:55:33,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 17:55:33,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 17:55:33,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 17:55:33,302 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand 37 states. [2020-07-20 17:55:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:35,242 INFO L93 Difference]: Finished difference Result 275 states and 376 transitions. [2020-07-20 17:55:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 17:55:35,243 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 206 [2020-07-20 17:55:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:35,247 INFO L225 Difference]: With dead ends: 275 [2020-07-20 17:55:35,247 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 17:55:35,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 373 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1051, Invalid=2371, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 17:55:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 17:55:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2020-07-20 17:55:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-20 17:55:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 290 transitions. [2020-07-20 17:55:35,270 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 290 transitions. Word has length 206 [2020-07-20 17:55:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:35,271 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 290 transitions. [2020-07-20 17:55:35,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 17:55:35,271 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 290 transitions. [2020-07-20 17:55:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-20 17:55:35,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:35,275 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:35,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:35,489 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1789545513, now seen corresponding path program 5 times [2020-07-20 17:55:35,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:35,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634017798] [2020-07-20 17:55:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:35,579 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:35,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 17:55:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:38,131 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:38,132 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:55:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-20 17:55:38,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:38,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:38,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:38,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:38,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:38,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:38,916 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:55:38,917 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 17:55:38,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:38,924 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 17:55:39,050 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:55:39,051 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 17:55:39,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:39,055 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:55:39,056 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 17:55:39,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:39,131 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 17:55:39,132 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 17:55:39,132 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 17:55:39,138 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 17:55:39,138 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 17:55:39,139 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 17:55:39,279 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 17:55:39,286 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 17:55:39,362 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts [2020-07-20 17:55:39,367 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 17:55:39,368 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 17:55:39,368 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 17:55:39,515 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 17:55:39,516 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 17:55:39,516 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 17:55:39,522 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 17:55:39,522 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 17:55:39,523 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 17:55:39,599 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 17:55:39,600 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 6, 1] term [2020-07-20 17:55:39,600 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 6 conjuncts [2020-07-20 17:55:39,605 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 17:55:39,771 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 17:55:39,779 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 17:55:39,886 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 17:55:39,891 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 17:55:40,075 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 17:55:40,083 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 17:55:40,084 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[8, 7, 1] term [2020-07-20 17:55:40,085 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 7 conjuncts [2020-07-20 17:55:40,184 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 17:55:40,185 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 17:55:40,185 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 17:55:40,191 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 17:55:40,192 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 17:55:40,192 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 17:55:40,380 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 17:55:40,381 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 17:55:40,382 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 17:55:40,389 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 17:55:40,391 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 17:55:40,391 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 17:55:40,500 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 17:55:40,505 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 17:55:40,721 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 17:55:40,730 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 17:55:40,860 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 17:55:40,866 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 17:55:41,100 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 17:55:41,106 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 17:55:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-20 17:55:41,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634017798] [2020-07-20 17:55:41,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:41,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 67 [2020-07-20 17:55:41,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489854751] [2020-07-20 17:55:41,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 17:55:41,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:41,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 17:55:41,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=3521, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 17:55:41,501 INFO L87 Difference]: Start difference. First operand 231 states and 290 transitions. Second operand 67 states. [2020-07-20 17:55:45,382 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-07-20 17:55:45,666 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 17:55:45,891 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 17:55:46,129 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 17:55:46,374 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:55:46,599 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 17:55:47,089 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 17:55:49,280 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 17:55:51,559 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:55:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:51,728 INFO L93 Difference]: Finished difference Result 302 states and 398 transitions. [2020-07-20 17:55:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-20 17:55:51,729 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 258 [2020-07-20 17:55:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:51,732 INFO L225 Difference]: With dead ends: 302 [2020-07-20 17:55:51,733 INFO L226 Difference]: Without dead ends: 300 [2020-07-20 17:55:51,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 447 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3232, Invalid=12770, Unknown=0, NotChecked=0, Total=16002 [2020-07-20 17:55:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-07-20 17:55:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-07-20 17:55:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-20 17:55:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 347 transitions. [2020-07-20 17:55:51,767 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 347 transitions. Word has length 258 [2020-07-20 17:55:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:51,768 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 347 transitions. [2020-07-20 17:55:51,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 17:55:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 347 transitions. [2020-07-20 17:55:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-20 17:55:51,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:51,775 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 63, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:51,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:51,990 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1039722502, now seen corresponding path program 4 times [2020-07-20 17:55:51,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:51,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270945503] [2020-07-20 17:55:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:52,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:52,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 17:55:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:53,238 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:55:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-20 17:55:53,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:53,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:53,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:53,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:53,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:54,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:54,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:54,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:55,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:55,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:55,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 17:55:55,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:55,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:55:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-20 17:55:55,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270945503] [2020-07-20 17:55:55,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:55,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 69 [2020-07-20 17:55:55,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752973276] [2020-07-20 17:55:55,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 17:55:55,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:55,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 17:55:55,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=3064, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 17:55:55,911 INFO L87 Difference]: Start difference. First operand 270 states and 347 transitions. Second operand 69 states. [2020-07-20 17:56:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:56:00,533 INFO L93 Difference]: Finished difference Result 455 states and 649 transitions. [2020-07-20 17:56:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 17:56:00,534 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 406 [2020-07-20 17:56:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:56:00,537 INFO L225 Difference]: With dead ends: 455 [2020-07-20 17:56:00,538 INFO L226 Difference]: Without dead ends: 395 [2020-07-20 17:56:00,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 741 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3587, Invalid=7755, Unknown=0, NotChecked=0, Total=11342 [2020-07-20 17:56:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-07-20 17:56:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2020-07-20 17:56:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-07-20 17:56:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 507 transitions. [2020-07-20 17:56:00,578 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 507 transitions. Word has length 406 [2020-07-20 17:56:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:56:00,579 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 507 transitions. [2020-07-20 17:56:00,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 17:56:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 507 transitions. [2020-07-20 17:56:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 17:56:00,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:56:00,584 INFO L422 BasicCegarLoop]: trace histogram [80, 79, 79, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:56:00,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:00,798 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:56:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:56:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1959696841, now seen corresponding path program 6 times [2020-07-20 17:56:00,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:56:00,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760989389] [2020-07-20 17:56:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:00,953 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:56:00,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:56:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 88 conjunts are in the unsatisfiable core [2020-07-20 17:56:00,969 INFO L286 TraceCheckSpWp]: Computing forward predicates...