/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:55:31,186 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 17:55:31,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:55:31,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:55:31,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:55:31,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:55:31,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:55:31,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:55:31,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:55:31,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:55:31,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:55:31,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:55:31,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:55:31,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:55:31,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:55:31,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:55:31,312 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:55:31,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:55:31,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:55:31,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:55:31,316 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:55:31,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:55:31,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:55:31,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:55:31,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:55:31,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:55:31,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:55:31,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:55:31,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:55:31,319 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:55:31,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:55:31,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:55:31,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:55:31,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:55:31,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:55:31,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:55:31,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:55:31,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:55:31,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:55:31,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:55:31,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:55:31,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:55:31,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:31,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:55:31,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:55:31,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:55:31,607 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:55:31,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:55:31,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:55:31,635 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:55:31,638 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:55:31,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 17:55:31,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9681d3a/bcf4b9152f8c4026a0832f25098a4c46/FLAGdd31bf9f5 [2020-07-20 17:55:32,158 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:55:32,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 17:55:32,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9681d3a/bcf4b9152f8c4026a0832f25098a4c46/FLAGdd31bf9f5 [2020-07-20 17:55:32,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9681d3a/bcf4b9152f8c4026a0832f25098a4c46 [2020-07-20 17:55:32,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:55:32,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:55:32,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:55:32,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:55:32,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:55:32,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbde3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32, skipping insertion in model container [2020-07-20 17:55:32,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:55:32,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:55:32,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:55:32,837 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:55:32,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:55:32,874 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:55:32,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32 WrapperNode [2020-07-20 17:55:32,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:55:32,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:55:32,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:55:32,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:55:32,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... [2020-07-20 17:55:32,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:55:32,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:55:32,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:55:32,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:55:32,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:55:33,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:55:33,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:55:33,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:55:33,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:55:33,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:55:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:55:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:55:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:55:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:55:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:55:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:55:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:55:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:55:33,312 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:55:33,312 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:55:33,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:55:33 BoogieIcfgContainer [2020-07-20 17:55:33,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:55:33,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:55:33,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:55:33,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:55:33,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:55:32" (1/3) ... [2020-07-20 17:55:33,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbc1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:55:33, skipping insertion in model container [2020-07-20 17:55:33,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (2/3) ... [2020-07-20 17:55:33,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbc1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:55:33, skipping insertion in model container [2020-07-20 17:55:33,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:55:33" (3/3) ... [2020-07-20 17:55:33,336 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2020-07-20 17:55:33,351 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:55:33,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:55:33,389 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:55:33,415 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:55:33,415 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:55:33,416 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:55:33,416 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:55:33,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:55:33,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:55:33,416 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:55:33,417 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:55:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 17:55:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 17:55:33,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:33,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:33,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:33,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-20 17:55:33,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:33,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862280880] [2020-07-20 17:55:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:33,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:55:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:33,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:55:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:33,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:55:33,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862280880] [2020-07-20 17:55:33,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:55:33,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:55:33,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029994363] [2020-07-20 17:55:33,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:55:33,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:55:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:55:33,625 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 17:55:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:33,671 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-20 17:55:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:55:33,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 17:55:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:33,680 INFO L225 Difference]: With dead ends: 32 [2020-07-20 17:55:33,680 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 17:55:33,683 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 [2020-07-20 17:55:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 17:55:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 17:55:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 17:55:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 17:55:33,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 17:55:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:33,719 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 17:55:33,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:55:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 17:55:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 17:55:33,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:33,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:33,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:33,934 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-20 17:55:33,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:33,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387908057] [2020-07-20 17:55:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:33,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:33,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 17:55:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:34,114 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:55:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:34,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:34,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:34,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387908057] [2020-07-20 17:55:34,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:34,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 17:55:34,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063384810] [2020-07-20 17:55:34,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 17:55:34,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 17:55:34,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:55:34,336 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-07-20 17:55:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:34,559 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-20 17:55:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:55:34,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-07-20 17:55:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:34,561 INFO L225 Difference]: With dead ends: 21 [2020-07-20 17:55:34,561 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 17:55:34,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:55:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 17:55:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 17:55:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 17:55:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 17:55:34,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-20 17:55:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:34,570 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 17:55:34,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 17:55:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 17:55:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:55:34,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:34,571 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:34,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:34,786 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash -66279700, now seen corresponding path program 2 times [2020-07-20 17:55:34,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:34,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258853590] [2020-07-20 17:55:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:34,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:34,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 17:55:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:34,936 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:55:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:34,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:35,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:35,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258853590] [2020-07-20 17:55:35,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:35,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 17:55:35,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749700715] [2020-07-20 17:55:35,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 17:55:35,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 17:55:35,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-07-20 17:55:35,131 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2020-07-20 17:55:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:35,578 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-07-20 17:55:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 17:55:35,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2020-07-20 17:55:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:35,580 INFO L225 Difference]: With dead ends: 25 [2020-07-20 17:55:35,580 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 17:55:35,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 17:55:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 17:55:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 17:55:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 17:55:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 17:55:35,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2020-07-20 17:55:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:35,590 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 17:55:35,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 17:55:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 17:55:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 17:55:35,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:35,591 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:35,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:35,805 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash -43331668, now seen corresponding path program 3 times [2020-07-20 17:55:35,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:35,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521112965] [2020-07-20 17:55:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:35,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:35,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:35,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-20 17:55:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:36,024 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:55:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:36,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:36,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:36,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521112965] [2020-07-20 17:55:36,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:36,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-20 17:55:36,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649534735] [2020-07-20 17:55:36,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 17:55:36,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:36,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 17:55:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-07-20 17:55:36,409 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 23 states. [2020-07-20 17:55:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:37,592 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-07-20 17:55:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 17:55:37,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2020-07-20 17:55:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:37,594 INFO L225 Difference]: With dead ends: 33 [2020-07-20 17:55:37,594 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 17:55:37,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 17:55:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 17:55:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 17:55:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:55:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 17:55:37,604 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2020-07-20 17:55:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:37,605 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 17:55:37,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 17:55:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 17:55:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 17:55:37,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:37,606 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:37,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:37,820 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 101712172, now seen corresponding path program 4 times [2020-07-20 17:55:37,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:37,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282264651] [2020-07-20 17:55:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:37,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:37,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:37,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-20 17:55:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:38,234 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:55:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:38,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:38,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:39,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282264651] [2020-07-20 17:55:39,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:39,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-07-20 17:55:39,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119997056] [2020-07-20 17:55:39,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 17:55:39,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:39,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 17:55:39,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 17:55:39,306 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 40 states. [2020-07-20 17:55:40,186 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 17:55:40,469 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-07-20 17:55:40,671 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 17:55:40,892 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-07-20 17:55:41,083 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 17:55:43,009 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-20 17:55:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:55:43,020 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2020-07-20 17:55:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 17:55:43,021 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 26 [2020-07-20 17:55:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:55:43,022 INFO L225 Difference]: With dead ends: 49 [2020-07-20 17:55:43,022 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 17:55:43,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1203, Invalid=4199, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 17:55:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 17:55:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 17:55:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 17:55:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-07-20 17:55:43,038 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 26 [2020-07-20 17:55:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:55:43,038 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-07-20 17:55:43,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 17:55:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-07-20 17:55:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 17:55:43,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:55:43,040 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:55:43,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:43,247 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:55:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:55:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash -868359124, now seen corresponding path program 5 times [2020-07-20 17:55:43,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:55:43,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945124394] [2020-07-20 17:55:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:55:43,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:55:43,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:55:43,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-20 17:55:43,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:55:44,393 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:55:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:44,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:55:44,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:55:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:55:47,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945124394] [2020-07-20 17:55:47,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:55:47,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 72 [2020-07-20 17:55:47,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81194278] [2020-07-20 17:55:47,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-20 17:55:47,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:55:47,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-20 17:55:47,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=4002, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 17:55:47,785 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 72 states. [2020-07-20 17:55:50,746 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-20 17:55:51,377 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 140 [2020-07-20 17:55:51,990 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-20 17:55:52,542 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 130 [2020-07-20 17:55:53,111 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 17:55:53,772 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 17:55:54,306 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 17:55:54,857 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 17:55:55,414 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-20 17:55:55,948 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-20 17:55:56,455 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 17:55:56,952 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 17:55:57,441 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 17:55:57,929 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 17:55:58,369 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 17:55:58,787 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 17:55:59,198 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 17:55:59,588 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 17:55:59,986 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 17:56:00,360 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 17:56:00,712 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 17:56:01,055 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 17:56:04,630 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-20 17:56:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:56:04,643 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2020-07-20 17:56:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-20 17:56:04,644 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 42 [2020-07-20 17:56:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:56:04,646 INFO L225 Difference]: With dead ends: 81 [2020-07-20 17:56:04,646 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 17:56:04,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=4419, Invalid=14487, Unknown=0, NotChecked=0, Total=18906 [2020-07-20 17:56:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 17:56:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 17:56:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 17:56:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-07-20 17:56:04,675 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 42 [2020-07-20 17:56:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:56:04,675 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-07-20 17:56:04,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-20 17:56:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-07-20 17:56:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-20 17:56:04,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:56:04,678 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:56:04,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:04,893 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:56:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:56:04,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1445440044, now seen corresponding path program 6 times [2020-07-20 17:56:04,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:56:04,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115176546] [2020-07-20 17:56:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:04,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:56:04,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:56:05,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-20 17:56:05,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:56:08,999 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:56:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:56:09,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:56:09,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:56:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:56:22,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115176546] [2020-07-20 17:56:22,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:56:22,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 135 [2020-07-20 17:56:22,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952861874] [2020-07-20 17:56:22,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2020-07-20 17:56:22,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:56:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2020-07-20 17:56:22,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4241, Invalid=13849, Unknown=0, NotChecked=0, Total=18090 [2020-07-20 17:56:22,233 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 135 states. [2020-07-20 17:56:32,945 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 17:56:34,766 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 428 DAG size of output: 270 [2020-07-20 17:56:37,219 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 411 [2020-07-20 17:56:38,754 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 416 DAG size of output: 258 [2020-07-20 17:56:41,156 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 405 [2020-07-20 17:56:43,769 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-20 17:56:46,180 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 392 [2020-07-20 17:56:48,554 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 17:56:50,904 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-07-20 17:56:53,287 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2020-07-20 17:56:55,655 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2020-07-20 17:56:57,984 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-07-20 17:57:00,343 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-07-20 17:57:02,713 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-07-20 17:57:05,048 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-07-20 17:57:07,359 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-07-20 17:57:09,690 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2020-07-20 17:57:11,955 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-07-20 17:57:14,230 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-07-20 17:57:16,479 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-07-20 17:57:18,697 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-07-20 17:57:20,899 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-07-20 17:57:23,099 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-20 17:57:25,359 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-07-20 17:57:27,584 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2020-07-20 17:57:29,709 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-20 17:57:31,880 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-07-20 17:57:33,984 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-20 17:57:36,050 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-20 17:57:38,128 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 17:57:40,178 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-20 17:57:42,162 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-20 17:57:44,132 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-20 17:57:46,027 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-07-20 17:57:47,969 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-20 17:57:49,793 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-20 17:57:51,658 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 17:57:53,456 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 17:57:55,194 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 17:57:56,912 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 17:57:58,581 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-20 17:58:00,290 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-20 17:58:01,892 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 17:58:03,467 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 17:58:05,027 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 17:58:06,556 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 17:58:08,005 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 17:58:09,375 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 17:58:10,718 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 17:58:12,014 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 17:58:13,320 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 17:58:14,562 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 17:58:15,751 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 17:58:16,861 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 17:58:17,952 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 17:58:19,005 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 17:58:20,082 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:58:21,037 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:58:21,960 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 17:58:22,850 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 17:58:23,703 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 17:58:31,028 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 415 [2020-07-20 17:58:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:58:31,053 INFO L93 Difference]: Finished difference Result 145 states and 208 transitions. [2020-07-20 17:58:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-07-20 17:58:31,055 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 74 [2020-07-20 17:58:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:58:31,058 INFO L225 Difference]: With dead ends: 145 [2020-07-20 17:58:31,058 INFO L226 Difference]: Without dead ends: 139 [2020-07-20 17:58:31,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8959 ImplicationChecksByTransitivity, 139.0s TimeCoverageRelationStatistics Valid=16988, Invalid=52972, Unknown=0, NotChecked=0, Total=69960 [2020-07-20 17:58:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-20 17:58:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-07-20 17:58:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-20 17:58:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-07-20 17:58:31,121 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 74 [2020-07-20 17:58:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:58:31,121 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-07-20 17:58:31,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 135 states. [2020-07-20 17:58:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-07-20 17:58:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-20 17:58:31,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:58:31,124 INFO L422 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:58:31,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:58:31,340 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:58:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:58:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1338821076, now seen corresponding path program 7 times [2020-07-20 17:58:31,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:58:31,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430905563] [2020-07-20 17:58:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:58:31,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:58:31,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:58:31,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 770 conjunts are in the unsatisfiable core [2020-07-20 17:58:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:58:57,358 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:58:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:58:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:58:59,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:00:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:00:48,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430905563] [2020-07-20 18:00:48,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:00:48,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 263 [2020-07-20 18:00:48,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664663218] [2020-07-20 18:00:48,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 263 states [2020-07-20 18:00:48,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:00:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2020-07-20 18:00:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16657, Invalid=52249, Unknown=0, NotChecked=0, Total=68906 [2020-07-20 18:00:48,114 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 263 states. [2020-07-20 18:04:07,340 WARN L193 SmtUtils]: Spent 12.81 s on a formula simplification that was a NOOP. DAG size: 843 [2020-07-20 18:04:22,829 WARN L193 SmtUtils]: Spent 12.44 s on a formula simplification. DAG size of input: 844 DAG size of output: 526 [2020-07-20 18:05:54,230 WARN L193 SmtUtils]: Spent 11.15 s on a formula simplification that was a NOOP. DAG size: 827 [2020-07-20 18:06:09,090 WARN L193 SmtUtils]: Spent 12.79 s on a formula simplification. DAG size of input: 832 DAG size of output: 514 [2020-07-20 18:07:47,126 WARN L193 SmtUtils]: Spent 12.34 s on a formula simplification that was a NOOP. DAG size: 821 [2020-07-20 18:09:32,263 WARN L193 SmtUtils]: Spent 12.78 s on a formula simplification that was a NOOP. DAG size: 814