/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-lit/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:23:15,248 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 23:23:15,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:23:15,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:23:15,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:23:15,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:23:15,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:23:15,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:23:15,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:23:15,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:23:15,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:23:15,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:23:15,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:23:15,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:23:15,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:23:15,307 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 23:23:15,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:23:15,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:23:15,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:23:15,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:23:15,328 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:23:15,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:23:15,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:23:15,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:23:15,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:23:15,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:23:15,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:23:15,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:23:15,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:23:15,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:23:15,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:23:15,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:23:15,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:23:15,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:23:15,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:23:15,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:23:15,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:23:15,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:23:15,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:23:15,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:23:15,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:23:15,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:23:15,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:15,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:23:15,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:23:15,335 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 23:23:15,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:23:15,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:23:15,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:23:15,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:23:15,754 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:23:15,755 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-21 23:23:15,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4035405dd/7244bf35f03342ec85879a079c7b00ae/FLAG5cf69b6c0 [2020-07-21 23:23:16,455 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:23:16,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-21 23:23:16,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4035405dd/7244bf35f03342ec85879a079c7b00ae/FLAG5cf69b6c0 [2020-07-21 23:23:16,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4035405dd/7244bf35f03342ec85879a079c7b00ae [2020-07-21 23:23:16,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:23:16,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:23:16,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:16,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:23:16,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:23:16,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:16" (1/1) ... [2020-07-21 23:23:16,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7e7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:16, skipping insertion in model container [2020-07-21 23:23:16,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:16" (1/1) ... [2020-07-21 23:23:16,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:23:16,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:23:17,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:17,055 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:23:17,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:17,095 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:23:17,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17 WrapperNode [2020-07-21 23:23:17,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:17,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:23:17,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:23:17,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:23:17,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 23:23:17,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 23:23:17,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 23:23:17,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 23:23:17,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 23:23:17,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 23:23:17,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 23:23:17,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:23:17,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:23:17,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:23:17,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:23:17,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (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 23:23:17,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:23:17,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:23:17,331 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:23:17,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:23:17,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:23:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:23:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:23:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:23:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:23:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:23:17,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:23:17,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:23:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:23:17,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:23:17,563 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:23:17,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:17 BoogieIcfgContainer [2020-07-21 23:23:17,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:23:17,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:23:17,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:23:17,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:23:17,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:16" (1/3) ... [2020-07-21 23:23:17,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce5c586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:17, skipping insertion in model container [2020-07-21 23:23:17,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (2/3) ... [2020-07-21 23:23:17,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce5c586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:17, skipping insertion in model container [2020-07-21 23:23:17,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:17" (3/3) ... [2020-07-21 23:23:17,582 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2020-07-21 23:23:17,596 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:23:17,607 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:23:17,647 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:23:17,740 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:23:17,741 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:23:17,741 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:23:17,741 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:23:17,741 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:23:17,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:23:17,742 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:23:17,742 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:23:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 23:23:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:23:17,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:17,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:17,785 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-21 23:23:17,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:17,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594370862] [2020-07-21 23:23:17,802 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 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 23:23:17,870 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:23:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:17,946 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 23:23:17,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:17,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594370862] [2020-07-21 23:23:17,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:17,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:23:17,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613147549] [2020-07-21 23:23:17,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:23:17,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:17,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:23:17,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:17,981 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-21 23:23:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:18,032 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-21 23:23:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:23:18,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 23:23:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:18,045 INFO L225 Difference]: With dead ends: 32 [2020-07-21 23:23:18,045 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 23:23:18,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 23:23:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 23:23:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 23:23:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-21 23:23:18,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-21 23:23:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:18,099 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-21 23:23:18,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:23:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-21 23:23:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 23:23:18,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:18,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:18,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:18,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-21 23:23:18,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:18,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653675244] [2020-07-21 23:23:18,320 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 23:23:18,361 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:18,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:18,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 23:23:18,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:18,526 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:23:18,588 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 23:23:18,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:18,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:18,753 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 23:23:18,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653675244] [2020-07-21 23:23:18,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:18,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 23:23:18,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895901023] [2020-07-21 23:23:18,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:23:18,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:18,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:23:18,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:23:18,759 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-07-21 23:23:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:18,888 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-21 23:23:18,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:23:18,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-07-21 23:23:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:18,891 INFO L225 Difference]: With dead ends: 19 [2020-07-21 23:23:18,891 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 23:23:18,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:23:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 23:23:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 23:23:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 23:23:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 23:23:18,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 23:23:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:18,901 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 23:23:18,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:23:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 23:23:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 23:23:18,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:18,902 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:19,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:19,118 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1105094223, now seen corresponding path program 2 times [2020-07-21 23:23:19,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:19,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592196223] [2020-07-21 23:23:19,121 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 23:23:19,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 23:23:19,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:19,252 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:23:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:19,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:19,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:19,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592196223] [2020-07-21 23:23:19,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:19,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 23:23:19,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751447648] [2020-07-21 23:23:19,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 23:23:19,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 23:23:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:23:19,490 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2020-07-21 23:23:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:19,825 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 23:23:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 23:23:19,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-07-21 23:23:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:19,827 INFO L225 Difference]: With dead ends: 23 [2020-07-21 23:23:19,827 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 23:23:19,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-07-21 23:23:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 23:23:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 23:23:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 23:23:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 23:23:19,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 23:23:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:19,837 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 23:23:19,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 23:23:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 23:23:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:23:19,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:19,838 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:20,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:20,052 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:20,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1866925900, now seen corresponding path program 3 times [2020-07-21 23:23:20,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:20,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511367599] [2020-07-21 23:23:20,054 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 23:23:20,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:20,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:20,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-21 23:23:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:20,245 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:23:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:20,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:20,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:20,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511367599] [2020-07-21 23:23:20,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:20,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-21 23:23:20,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589442023] [2020-07-21 23:23:20,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 23:23:20,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:20,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 23:23:20,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-21 23:23:20,556 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2020-07-21 23:23:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:21,350 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 23:23:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 23:23:21,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2020-07-21 23:23:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:21,352 INFO L225 Difference]: With dead ends: 29 [2020-07-21 23:23:21,352 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 23:23:21,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 23:23:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 23:23:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 23:23:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 23:23:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 23:23:21,363 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 23:23:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:21,363 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 23:23:21,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 23:23:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 23:23:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:23:21,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:21,364 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:21,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,579 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1577490540, now seen corresponding path program 4 times [2020-07-21 23:23:21,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:21,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274774364] [2020-07-21 23:23:21,580 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 23:23:21,617 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:21,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:21,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 74 conjunts are in the unsatisfiable core [2020-07-21 23:23:21,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:21,911 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:23:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:21,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:22,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:22,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274774364] [2020-07-21 23:23:22,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:22,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-21 23:23:22,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010767749] [2020-07-21 23:23:22,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 23:23:22,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:22,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 23:23:22,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-07-21 23:23:22,658 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 32 states. [2020-07-21 23:23:23,522 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-07-21 23:23:23,807 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-07-21 23:23:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:24,932 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 23:23:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 23:23:24,936 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 22 [2020-07-21 23:23:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:24,937 INFO L225 Difference]: With dead ends: 41 [2020-07-21 23:23:24,937 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 23:23:24,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=719, Invalid=2587, Unknown=0, NotChecked=0, Total=3306 [2020-07-21 23:23:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 23:23:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 23:23:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 23:23:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 23:23:24,950 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 23:23:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:24,950 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 23:23:24,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 23:23:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 23:23:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 23:23:24,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:24,952 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:25,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:25,168 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash -718556500, now seen corresponding path program 5 times [2020-07-21 23:23:25,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:25,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201966869] [2020-07-21 23:23:25,170 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 23:23:25,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:25,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:25,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 146 conjunts are in the unsatisfiable core [2020-07-21 23:23:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:25,917 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:23:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:26,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:26,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:27,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201966869] [2020-07-21 23:23:27,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:27,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 55 [2020-07-21 23:23:27,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725609320] [2020-07-21 23:23:27,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-21 23:23:27,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:27,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-21 23:23:27,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=2329, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 23:23:27,910 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 55 states. [2020-07-21 23:23:29,562 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 23:23:30,021 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 108 [2020-07-21 23:23:30,449 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 23:23:30,825 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 98 [2020-07-21 23:23:31,226 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 23:23:31,644 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 23:23:31,981 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 23:23:32,327 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 23:23:32,659 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 23:23:32,977 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 23:23:33,282 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 23:23:33,576 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 23:23:33,879 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 23:23:34,170 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 23:23:34,445 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 23:23:34,938 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 23:23:37,128 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-21 23:23:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:37,147 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-21 23:23:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 23:23:37,148 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 34 [2020-07-21 23:23:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:37,152 INFO L225 Difference]: With dead ends: 65 [2020-07-21 23:23:37,153 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 23:23:37,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2548, Invalid=8372, Unknown=0, NotChecked=0, Total=10920 [2020-07-21 23:23:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 23:23:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 23:23:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 23:23:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 23:23:37,200 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 23:23:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:37,201 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 23:23:37,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-21 23:23:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 23:23:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 23:23:37,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:37,209 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:37,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:37,423 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash 944097068, now seen corresponding path program 6 times [2020-07-21 23:23:37,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:37,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519172070] [2020-07-21 23:23:37,426 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 23:23:37,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:37,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 290 conjunts are in the unsatisfiable core [2020-07-21 23:23:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:40,128 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:23:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:40,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:40,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:47,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519172070] [2020-07-21 23:23:47,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:47,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 103 [2020-07-21 23:23:47,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865647575] [2020-07-21 23:23:47,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-21 23:23:47,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:47,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-21 23:23:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=8089, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 23:23:47,720 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 103 states. [2020-07-21 23:23:54,286 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2020-07-21 23:23:55,537 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 204 [2020-07-21 23:23:56,962 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-07-21 23:23:58,001 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 194 [2020-07-21 23:23:59,404 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-07-21 23:24:00,922 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-07-21 23:24:02,277 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-21 23:24:03,719 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-07-21 23:24:05,071 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2020-07-21 23:24:06,444 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-21 23:24:07,800 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-07-21 23:24:09,075 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-21 23:24:10,371 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-21 23:24:11,669 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 23:24:12,940 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-21 23:24:14,098 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-21 23:24:15,331 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 23:24:16,475 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-07-21 23:24:17,658 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-21 23:24:18,825 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-21 23:24:19,968 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 23:24:21,051 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-21 23:24:22,156 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 23:24:23,236 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 23:24:24,299 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-21 23:24:25,326 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-21 23:24:26,354 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-21 23:24:27,352 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 23:24:28,318 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 23:24:29,260 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 23:24:30,118 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 23:24:30,900 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 23:24:31,746 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 23:24:32,519 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 23:24:33,304 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 23:24:34,087 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 23:24:34,834 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 23:24:35,569 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 23:24:36,202 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 23:24:36,883 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 23:24:37,521 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 23:24:38,152 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 23:24:43,706 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-07-21 23:24:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:24:43,724 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-21 23:24:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 23:24:43,726 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 58 [2020-07-21 23:24:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:24:43,729 INFO L225 Difference]: With dead ends: 113 [2020-07-21 23:24:43,729 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 23:24:43,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5183 ImplicationChecksByTransitivity, 61.6s TimeCoverageRelationStatistics Valid=9676, Invalid=30524, Unknown=0, NotChecked=0, Total=40200 [2020-07-21 23:24:43,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 23:24:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 23:24:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 23:24:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 23:24:43,778 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 23:24:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:24:43,778 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 23:24:43,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-21 23:24:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 23:24:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 23:24:43,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:24:43,781 INFO L422 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:24:43,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:43,982 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:24:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:24:43,983 INFO L82 PathProgramCache]: Analyzing trace with hash -679907284, now seen corresponding path program 7 times [2020-07-21 23:24:43,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:24:43,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390300224] [2020-07-21 23:24:43,984 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 23:24:44,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:24:44,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:24:44,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 578 conjunts are in the unsatisfiable core [2020-07-21 23:24:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:24:58,078 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:24:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:24:58,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:24:59,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:51,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390300224] [2020-07-21 23:25:51,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:51,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 199 [2020-07-21 23:25:51,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193805494] [2020-07-21 23:25:51,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 199 states [2020-07-21 23:25:51,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2020-07-21 23:25:51,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9425, Invalid=29977, Unknown=0, NotChecked=0, Total=39402 [2020-07-21 23:25:51,933 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 199 states. [2020-07-21 23:26:54,497 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification that was a NOOP. DAG size: 635 [2020-07-21 23:27:01,099 WARN L193 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 636 DAG size of output: 398 [2020-07-21 23:27:21,183 WARN L193 SmtUtils]: Spent 4.61 s on a formula simplification that was a NOOP. DAG size: 619 [2020-07-21 23:27:26,915 WARN L193 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 624 DAG size of output: 386 [2020-07-21 23:27:48,824 WARN L193 SmtUtils]: Spent 4.60 s on a formula simplification that was a NOOP. DAG size: 613 [2020-07-21 23:28:12,317 WARN L193 SmtUtils]: Spent 4.54 s on a formula simplification that was a NOOP. DAG size: 606 [2020-07-21 23:28:35,625 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification that was a NOOP. DAG size: 600 [2020-07-21 23:28:59,176 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 593 [2020-07-21 23:29:24,327 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification that was a NOOP. DAG size: 587 [2020-07-21 23:29:50,004 WARN L193 SmtUtils]: Spent 5.00 s on a formula simplification that was a NOOP. DAG size: 580 [2020-07-21 23:30:16,588 WARN L193 SmtUtils]: Spent 4.97 s on a formula simplification that was a NOOP. DAG size: 574 [2020-07-21 23:30:42,768 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification that was a NOOP. DAG size: 567 [2020-07-21 23:31:10,796 WARN L193 SmtUtils]: Spent 5.23 s on a formula simplification that was a NOOP. DAG size: 561 [2020-07-21 23:31:39,371 WARN L193 SmtUtils]: Spent 5.09 s on a formula simplification that was a NOOP. DAG size: 554 [2020-07-21 23:32:08,501 WARN L193 SmtUtils]: Spent 5.17 s on a formula simplification that was a NOOP. DAG size: 548 [2020-07-21 23:32:35,498 WARN L193 SmtUtils]: Spent 4.52 s on a formula simplification that was a NOOP. DAG size: 541 [2020-07-21 23:33:02,926 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification that was a NOOP. DAG size: 535 [2020-07-21 23:33:29,284 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification that was a NOOP. DAG size: 528 [2020-07-21 23:33:56,446 WARN L193 SmtUtils]: Spent 4.68 s on a formula simplification that was a NOOP. DAG size: 522 [2020-07-21 23:34:16,556 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 515 [2020-07-21 23:34:36,913 WARN L193 SmtUtils]: Spent 3.70 s on a formula simplification that was a NOOP. DAG size: 509 [2020-07-21 23:34:57,547 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 502 [2020-07-21 23:35:18,495 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification that was a NOOP. DAG size: 496 [2020-07-21 23:35:37,680 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification that was a NOOP. DAG size: 489 [2020-07-21 23:35:56,505 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification that was a NOOP. DAG size: 483 [2020-07-21 23:36:14,708 WARN L193 SmtUtils]: Spent 3.26 s on a formula simplification that was a NOOP. DAG size: 476 [2020-07-21 23:36:33,474 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification that was a NOOP. DAG size: 470 [2020-07-21 23:36:52,181 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification that was a NOOP. DAG size: 463 [2020-07-21 23:37:10,579 WARN L193 SmtUtils]: Spent 3.31 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 23:37:29,530 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 450