/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:27:11,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:27:11,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:27:11,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:27:11,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:27:11,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:27:11,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:27:11,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:27:11,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:27:11,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:27:11,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:27:11,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:27:11,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:27:11,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:27:11,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:27:11,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:27:11,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:27:11,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:27:11,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:27:11,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:27:11,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:27:11,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:27:11,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:27:11,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:27:11,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:27:11,595 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 [2020-07-21 23:27:11,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:27:11,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:27:11,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:27:11,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:27:11,612 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:27:11,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:27:11,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:27:11,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:27:11,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:27:11,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:27:11,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:27:11,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:27:11,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:27:11,614 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:27:11,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:27:11,614 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:27:11,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:27:11,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:27:11,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:27:11,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:27:11,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:27:11,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:27:11,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:27:11,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:27:11,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:27:11,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:27:11,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:11,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:27:11,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:27:11,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:27:11,894 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:27:11,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:27:11,911 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:27:11,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:27:11,913 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:27:11,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-21 23:27:11,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8413fed58/8a2ba7c26821480d9f34eb2026d2f7da/FLAGe2e179766 [2020-07-21 23:27:12,421 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:27:12,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-21 23:27:12,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8413fed58/8a2ba7c26821480d9f34eb2026d2f7da/FLAGe2e179766 [2020-07-21 23:27:12,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8413fed58/8a2ba7c26821480d9f34eb2026d2f7da [2020-07-21 23:27:12,804 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:27:12,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:27:12,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:27:12,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:27:12,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:27:12,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:27:12" (1/1) ... [2020-07-21 23:27:12,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2043f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:12, skipping insertion in model container [2020-07-21 23:27:12,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:27:12" (1/1) ... [2020-07-21 23:27:12,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:27:12,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:27:13,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:27:13,016 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:27:13,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:27:13,047 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:27:13,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13 WrapperNode [2020-07-21 23:27:13,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:27:13,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:27:13,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:27:13,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:27:13,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... [2020-07-21 23:27:13,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... [2020-07-21 23:27:13,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... [2020-07-21 23:27:13,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... [2020-07-21 23:27:13,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... [2020-07-21 23:27:13,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... [2020-07-21 23:27:13,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... [2020-07-21 23:27:13,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:27:13,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:27:13,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:27:13,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:27:13,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:27:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:27:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:27:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:27:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:27:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:27:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:27:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:27:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:27:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:27:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:27:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:27:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:27:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:27:13,442 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:27:13,442 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:27:13,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:27:13 BoogieIcfgContainer [2020-07-21 23:27:13,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:27:13,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:27:13,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:27:13,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:27:13,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:27:12" (1/3) ... [2020-07-21 23:27:13,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587f1872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:27:13, skipping insertion in model container [2020-07-21 23:27:13,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:27:13" (2/3) ... [2020-07-21 23:27:13,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587f1872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:27:13, skipping insertion in model container [2020-07-21 23:27:13,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:27:13" (3/3) ... [2020-07-21 23:27:13,454 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-21 23:27:13,466 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:27:13,473 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:27:13,488 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:27:13,508 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:27:13,508 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:27:13,508 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:27:13,509 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:27:13,509 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:27:13,509 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:27:13,509 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:27:13,509 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:27:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 23:27:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:27:13,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:13,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:13,534 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:13,539 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-21 23:27:13,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:13,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530910058] [2020-07-21 23:27:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:13,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:27:13,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:27:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:13,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:27:13,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530910058] [2020-07-21 23:27:13,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:27:13,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:27:13,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819894222] [2020-07-21 23:27:13,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:27:13,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:27:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:27:13,708 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 23:27:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:27:13,733 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-21 23:27:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:27:13,734 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 23:27:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:27:13,746 INFO L225 Difference]: With dead ends: 33 [2020-07-21 23:27:13,747 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 23:27:13,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:27:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 23:27:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 23:27:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 23:27:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 23:27:13,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-21 23:27:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:27:13,788 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 23:27:13,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:27:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 23:27:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:27:13,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:13,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:13,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:13,991 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-21 23:27:13,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:13,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035923145] [2020-07-21 23:27:13,994 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:14,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:27:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:27:14,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:14,121 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:27:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:14,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:27:14,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035923145] [2020-07-21 23:27:14,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:27:14,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:27:14,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696886205] [2020-07-21 23:27:14,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:27:14,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:27:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:27:14,185 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-21 23:27:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:27:14,281 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-21 23:27:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:27:14,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 23:27:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:27:14,286 INFO L225 Difference]: With dead ends: 26 [2020-07-21 23:27:14,286 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 23:27:14,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:27:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 23:27:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-21 23:27:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:27:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 23:27:14,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-21 23:27:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:27:14,296 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 23:27:14,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:27:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 23:27:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 23:27:14,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:14,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:14,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:14,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:14,516 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-21 23:27:14,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:14,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766622323] [2020-07-21 23:27:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:14,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:27:14,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:14,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:27:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:14,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:27:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:14,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766622323] [2020-07-21 23:27:14,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:14,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-21 23:27:14,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299320047] [2020-07-21 23:27:14,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 23:27:14,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:14,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 23:27:14,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:27:14,697 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-21 23:27:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:27:14,814 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-21 23:27:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:27:14,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-21 23:27:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:27:14,816 INFO L225 Difference]: With dead ends: 31 [2020-07-21 23:27:14,816 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 23:27:14,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:27:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 23:27:14,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-21 23:27:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 23:27:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 23:27:14,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-21 23:27:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:27:14,824 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 23:27:14,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 23:27:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 23:27:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 23:27:14,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:14,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:15,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:15,041 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-21 23:27:15,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:15,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578117170] [2020-07-21 23:27:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:15,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:27:15,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:15,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 23:27:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:15,200 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:27:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:15,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:27:15,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:27:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:15,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578117170] [2020-07-21 23:27:15,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:15,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 23:27:15,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232469867] [2020-07-21 23:27:15,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 23:27:15,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 23:27:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-21 23:27:15,566 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-21 23:27:15,931 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-21 23:27:16,368 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-21 23:27:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:27:16,561 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-21 23:27:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 23:27:16,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-21 23:27:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:27:16,563 INFO L225 Difference]: With dead ends: 46 [2020-07-21 23:27:16,564 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 23:27:16,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-21 23:27:16,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 23:27:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-21 23:27:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 23:27:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-21 23:27:16,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-21 23:27:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:27:16,581 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-21 23:27:16,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 23:27:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-21 23:27:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 23:27:16,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:16,586 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:16,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:16,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-21 23:27:16,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:16,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247134422] [2020-07-21 23:27:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:16,854 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:27:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:27:16,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 23:27:16,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:27:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 23:27:16,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247134422] [2020-07-21 23:27:16,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:16,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 23:27:16,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635937700] [2020-07-21 23:27:16,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 23:27:16,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 23:27:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:27:16,961 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-21 23:27:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:27:17,030 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-07-21 23:27:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:27:17,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 23:27:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:27:17,031 INFO L225 Difference]: With dead ends: 43 [2020-07-21 23:27:17,031 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 23:27:17,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:27:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 23:27:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 23:27:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 23:27:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-07-21 23:27:17,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-07-21 23:27:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:27:17,040 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-07-21 23:27:17,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 23:27:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-07-21 23:27:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 23:27:17,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:17,041 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:17,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:17,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash -490417350, now seen corresponding path program 3 times [2020-07-21 23:27:17,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:17,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985266678] [2020-07-21 23:27:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:17,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:27:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 23:27:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:17,475 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:27:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:17,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:27:17,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:27:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:18,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985266678] [2020-07-21 23:27:18,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:18,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 23:27:18,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157625815] [2020-07-21 23:27:18,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 23:27:18,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 23:27:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-07-21 23:27:18,297 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2020-07-21 23:27:19,057 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-07-21 23:27:19,219 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-21 23:27:19,521 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-21 23:27:20,243 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:27:20,426 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-21 23:27:20,784 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-21 23:27:20,960 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-21 23:27:21,132 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-07-21 23:27:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:27:21,442 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-07-21 23:27:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 23:27:21,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-07-21 23:27:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:27:21,444 INFO L225 Difference]: With dead ends: 62 [2020-07-21 23:27:21,444 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 23:27:21,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 23:27:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 23:27:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 23:27:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 23:27:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-21 23:27:21,470 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2020-07-21 23:27:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:27:21,470 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-21 23:27:21,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 23:27:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-21 23:27:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 23:27:21,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:21,475 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:21,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:21,689 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:21,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2033682622, now seen corresponding path program 4 times [2020-07-21 23:27:21,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:21,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440744960] [2020-07-21 23:27:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:21,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:27:21,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-21 23:27:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:22,230 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:27:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:22,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:27:22,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:27:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:24,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440744960] [2020-07-21 23:27:24,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:24,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 23:27:24,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511161851] [2020-07-21 23:27:24,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 23:27:24,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 23:27:24,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 23:27:24,605 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2020-07-21 23:27:27,507 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:27,682 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:27:28,262 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:28,686 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:28,880 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:27:29,502 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 23:27:29,931 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 23:27:30,166 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 23:27:30,413 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 23:27:30,598 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 23:27:30,828 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:27:31,054 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 23:27:31,272 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:27:31,464 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 23:27:31,682 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:27:32,097 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 23:27:32,324 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 23:27:32,559 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 23:27:32,755 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 23:27:33,221 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 23:27:33,470 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 23:27:33,708 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 23:27:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:27:34,172 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-21 23:27:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-21 23:27:34,173 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2020-07-21 23:27:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:27:34,175 INFO L225 Difference]: With dead ends: 114 [2020-07-21 23:27:34,175 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 23:27:34,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2424, Invalid=9786, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 23:27:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 23:27:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-21 23:27:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 23:27:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-21 23:27:34,207 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 53 [2020-07-21 23:27:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:27:34,207 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-21 23:27:34,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 23:27:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-21 23:27:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-21 23:27:34,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:27:34,215 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:27:34,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:34,430 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:27:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:27:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1181026478, now seen corresponding path program 5 times [2020-07-21 23:27:34,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:27:34,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204544435] [2020-07-21 23:27:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:27:34,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:27:34,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:27:34,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-21 23:27:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:27:36,392 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:27:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:36,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:27:36,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:27:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:45,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204544435] [2020-07-21 23:27:45,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:45,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 23:27:45,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971425298] [2020-07-21 23:27:45,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 23:27:45,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 23:27:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7951, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 23:27:45,423 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2020-07-21 23:27:50,306 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 23:27:50,623 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 23:27:50,904 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 23:27:51,422 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 23:27:52,364 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:27:52,683 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:52,950 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:27:53,259 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:27:53,525 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:27:53,852 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:54,173 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 23:27:54,497 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:54,796 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:27:55,130 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:27:55,420 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:27:55,769 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 23:27:56,114 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 23:27:56,436 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 23:27:56,731 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 23:27:57,079 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:27:57,399 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:27:57,745 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:58,088 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:27:58,459 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:27:58,774 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:27:59,145 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:27:59,462 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:27:59,836 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:00,302 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:28:00,664 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:00,992 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:28:01,382 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:01,703 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:02,088 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:02,491 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:28:02,877 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:03,213 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:28:03,620 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:03,969 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:04,356 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:04,779 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:28:05,214 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:05,570 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:28:05,983 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:06,358 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:06,791 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:07,295 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:28:07,756 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:08,140 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:28:08,589 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:08,953 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:09,361 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:09,795 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:28:10,284 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:10,688 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:28:11,174 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:11,581 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:12,046 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:12,645 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:28:13,128 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:28:13,536 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:28:13,997 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:14,403 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:28:14,898 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:28:15,434 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 23:28:15,923 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:28:16,361 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:28:16,908 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 23:28:17,322 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 23:28:17,834 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:28:18,380 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 23:28:18,957 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:28:19,415 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 23:28:19,975 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:28:20,487 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:28:21,122 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 23:28:21,884 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 23:28:22,509 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 23:28:23,039 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 23:28:23,647 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 23:28:24,178 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 23:28:24,794 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 23:28:25,453 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 23:28:26,736 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-21 23:28:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:28:26,768 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2020-07-21 23:28:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2020-07-21 23:28:26,772 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2020-07-21 23:28:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:28:26,775 INFO L225 Difference]: With dead ends: 218 [2020-07-21 23:28:26,776 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 23:28:26,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12145 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=10004, Invalid=39502, Unknown=0, NotChecked=0, Total=49506 [2020-07-21 23:28:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 23:28:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 23:28:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 23:28:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-07-21 23:28:26,815 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 101 [2020-07-21 23:28:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:28:26,816 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-07-21 23:28:26,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 23:28:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-07-21 23:28:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-21 23:28:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:28:26,820 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:28:27,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:28:27,022 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:28:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:28:27,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1984747378, now seen corresponding path program 6 times [2020-07-21 23:28:27,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:28:27,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645678242] [2020-07-21 23:28:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:28:27,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:28:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:28:27,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-21 23:28:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:28:39,211 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:28:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:28:39,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:28:40,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:28:41,833 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 23:29:41,626 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 23:29:46,777 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 23:29:48,027 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 23:29:49,265 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 23:29:53,351 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 23:29:54,931 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 23:29:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:29:57,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645678242] [2020-07-21 23:29:57,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:29:57,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 23:29:57,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027400236] [2020-07-21 23:29:57,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 23:29:57,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:29:57,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 23:29:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8621, Invalid=29991, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 23:29:57,849 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2020-07-21 23:30:57,481 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-07-21 23:30:58,467 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-07-21 23:31:00,104 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 23:31:01,504 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 23:31:02,609 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 23:31:03,903 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-21 23:31:04,861 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 23:31:06,054 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 23:31:07,351 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 23:31:08,774 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 23:31:10,511 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:31:12,033 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:31:13,453 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:31:14,962 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:31:16,496 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:31:18,237 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:31:20,269 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 23:31:21,828 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:31:23,227 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:31:25,185 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:31:26,819 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:31:28,665 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 23:31:30,752 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 23:31:32,465 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 23:31:33,918 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 23:31:35,572 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:31:37,266 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:31:39,165 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:31:41,206 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:31:42,883 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:31:44,341 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:31:46,237 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:31:47,953 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:31:49,755 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:31:51,893 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:31:54,092 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:31:55,909 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:31:58,157 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:31:59,879 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:01,672 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:03,757 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:32:05,757 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:07,459 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:32:09,580 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:11,389 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:13,544 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:16,075 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:32:18,089 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:19,723 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:32:21,855 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:23,611 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:25,608 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:28,139 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:32:29,945 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:31,547 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:32:33,877 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:35,713 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:37,573 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:40,045 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:32:42,071 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:43,930 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:32:45,945 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:47,821 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:32:50,062 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:52,831 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:32:54,987 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:32:56,769 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:32:59,255 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:01,346 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:03,607 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:06,862 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:33:09,278 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:11,388 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:33:13,779 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:16,023 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:18,265 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:21,317 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:33:23,447 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:25,379 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:33:27,985 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:30,460 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:33,206 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:36,479 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:33:38,800 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:40,613 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:33:43,026 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:45,599 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:33:48,436 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:51,779 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:33:54,935 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:33:57,458 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:34:00,346 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:02,805 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:05,586 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:34:08,865 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:34:11,542 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:34:13,953 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:34:16,624 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:19,407 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:22,097 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:34:25,723 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:34:28,421 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:34:30,962 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:34:34,183 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:36,641 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:39,366 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:34:43,054 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:34:45,433 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:34:47,585 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:34:50,418 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:52,997 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:34:56,222 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:34:59,995 WARN L193 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:35:03,461 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:35:06,228 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:35:09,709 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:35:12,955 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:35:16,343 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:35:20,523 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:35:23,688 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:35:26,716 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:35:30,067 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:35:33,270 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:35:36,796 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:35:41,225 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:35:45,062 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:35:48,330 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:35:51,867 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:35:55,015 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:35:58,671 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:36:03,076 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:36:06,503 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:36:09,613 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:36:13,160 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:36:16,086 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:36:19,255 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:36:24,062 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:36:27,250 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:36:29,968 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:36:34,208 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:36:37,322 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:36:40,869 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:36:45,501 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:36:49,827 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:36:53,246 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:36:57,007 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:37:00,593 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:37:04,471 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:37:09,192 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:37:13,587 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:37:17,144 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:37:21,681 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:37:24,807 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:37:28,242 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:37:32,755 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:37:37,060 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:37:40,735 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:37:44,767 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:37:48,325 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:37:51,954 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:37:56,735 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 23:38:00,106 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 23:38:03,052 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:38:06,871 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:38:09,947 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 23:38:13,764 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:38:18,905 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 23:38:22,631 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:38:25,966 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 23:38:30,020 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 23:38:33,690 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 23:38:37,792 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:38:42,842 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 23:38:47,362 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 23:38:50,717 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 23:38:54,756 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:38:58,585 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 23:39:02,800 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 23:39:08,320 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 23:39:12,843 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 23:39:16,730 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 23:39:21,303 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 23:39:25,341 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 23:39:29,527 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 23:39:35,247 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 23:39:37,207 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 23:39:38,728 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 23:39:41,429 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 23:39:44,518 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-21 23:39:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:39:44,650 INFO L93 Difference]: Finished difference Result 426 states and 457 transitions. [2020-07-21 23:39:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2020-07-21 23:39:44,665 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2020-07-21 23:39:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:39:44,669 INFO L225 Difference]: With dead ends: 426 [2020-07-21 23:39:44,670 INFO L226 Difference]: Without dead ends: 390 [2020-07-21 23:39:44,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50369 ImplicationChecksByTransitivity, 602.0s TimeCoverageRelationStatistics Valid=40716, Invalid=158646, Unknown=0, NotChecked=0, Total=199362 [2020-07-21 23:39:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-21 23:39:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-07-21 23:39:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-21 23:39:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 390 transitions. [2020-07-21 23:39:44,767 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 390 transitions. Word has length 197 [2020-07-21 23:39:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:39:44,768 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 390 transitions. [2020-07-21 23:39:44,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 197 states. [2020-07-21 23:39:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 390 transitions. [2020-07-21 23:39:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-21 23:39:44,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:39:44,782 INFO L422 BasicCegarLoop]: trace histogram [126, 126, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:39:44,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:39:44,984 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:39:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:39:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash -354150478, now seen corresponding path program 7 times [2020-07-21 23:39:44,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:39:44,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388102557] [2020-07-21 23:39:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:39:45,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:39:45,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:39:45,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-21 23:39:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:41:33,710 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:41:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:41:36,660 INFO L328 TraceCheckSpWp]: Computing backward predicates...