/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 NOT_INCREMENTALLY -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 12:00:22,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:00:22,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:00:22,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:00:22,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:00:22,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:00:22,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:00:22,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:00:22,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:00:22,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:00:22,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:00:22,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:00:22,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:00:22,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:00:22,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:00:22,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:00:22,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:00:22,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:00:22,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:00:22,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:00:22,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:00:22,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:00:22,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:00:22,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:00:22,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:00:22,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:00:22,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:00:22,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:00:22,247 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 12:00:22,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:00:22,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:00:22,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:00:22,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:00:22,264 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:00:22,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:00:22,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:00:22,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:00:22,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:00:22,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:00:22,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:00:22,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:00:22,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:00:22,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:00:22,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:00:22,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:00:22,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:00:22,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:00:22,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:00:22,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:00:22,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:00:22,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:00:22,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:00:22,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:00:22,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:00:22,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:00:22,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:22,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:00:22,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:00:22,269 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 -> NOT_INCREMENTALLY [2020-07-20 12:00:22,567 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:00:22,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:00:22,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:00:22,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:00:22,600 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:00:22,601 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 12:00:22,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd50f643/4b5790b899cd429b8e35f5a9edbdfee3/FLAG373794a69 [2020-07-20 12:00:23,187 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:00:23,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 12:00:23,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd50f643/4b5790b899cd429b8e35f5a9edbdfee3/FLAG373794a69 [2020-07-20 12:00:23,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd50f643/4b5790b899cd429b8e35f5a9edbdfee3 [2020-07-20 12:00:23,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:00:23,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:00:23,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:00:23,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:00:23,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:00:23,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640595e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23, skipping insertion in model container [2020-07-20 12:00:23,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:00:23,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:00:23,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:00:23,857 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:00:23,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:00:23,901 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:00:23,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23 WrapperNode [2020-07-20 12:00:23,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:00:23,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:00:23,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:00:23,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:00:23,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:23,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (1/1) ... [2020-07-20 12:00:24,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:00:24,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:00:24,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:00:24,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:00:24,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (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 12:00:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:00:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:00:24,137 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:00:24,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:00:24,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:00:24,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:00:24,137 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:00:24,138 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:00:24,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:00:24,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:00:24,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:00:24,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:00:24,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:00:24,332 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:00:24,333 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:00:24,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:00:24 BoogieIcfgContainer [2020-07-20 12:00:24,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:00:24,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:00:24,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:00:24,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:00:24,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:00:23" (1/3) ... [2020-07-20 12:00:24,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e72aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:00:24, skipping insertion in model container [2020-07-20 12:00:24,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:00:23" (2/3) ... [2020-07-20 12:00:24,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e72aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:00:24, skipping insertion in model container [2020-07-20 12:00:24,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:00:24" (3/3) ... [2020-07-20 12:00:24,347 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2020-07-20 12:00:24,359 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:00:24,366 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:00:24,380 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:00:24,406 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:00:24,406 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:00:24,407 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:00:24,407 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:00:24,407 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:00:24,407 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:00:24,407 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:00:24,407 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:00:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 12:00:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 12:00:24,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:24,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:24,437 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-20 12:00:24,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:24,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39230417] [2020-07-20 12:00:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:00:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:00:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:24,606 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 12:00:24,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:00:24,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39230417] [2020-07-20 12:00:24,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:00:24,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:00:24,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978312341] [2020-07-20 12:00:24,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:00:24,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:24,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:00:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:00:24,658 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 12:00:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:24,707 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-20 12:00:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:00:24,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 12:00:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:24,719 INFO L225 Difference]: With dead ends: 32 [2020-07-20 12:00:24,719 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 12:00:24,723 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 12:00:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 12:00:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 12:00:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 12:00:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 12:00:24,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 12:00:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:24,766 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 12:00:24,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:00:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 12:00:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 12:00:24,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:24,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:24,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:24,982 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-20 12:00:24,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:24,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549698471] [2020-07-20 12:00:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:00:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 12:00:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:25,162 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 12:00:25,217 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 12:00:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:25,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:00:25,368 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 12:00:25,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549698471] [2020-07-20 12:00:25,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:25,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 12:00:25,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219046099] [2020-07-20 12:00:25,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 12:00:25,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 12:00:25,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 12:00:25,373 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-07-20 12:00:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:25,477 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-20 12:00:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 12:00:25,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-07-20 12:00:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:25,479 INFO L225 Difference]: With dead ends: 19 [2020-07-20 12:00:25,479 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 12:00:25,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-07-20 12:00:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 12:00:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 12:00:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 12:00:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 12:00:25,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 12:00:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:25,487 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 12:00:25,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 12:00:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 12:00:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 12:00:25,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:25,488 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:25,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:25,690 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1105094223, now seen corresponding path program 2 times [2020-07-20 12:00:25,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:25,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874825014] [2020-07-20 12:00:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:00:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:25,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 12:00:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:25,816 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 12:00:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:25,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:25,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:00:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:26,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874825014] [2020-07-20 12:00:26,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:26,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 12:00:26,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731673991] [2020-07-20 12:00:26,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 12:00:26,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:26,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 12:00:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-20 12:00:26,031 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2020-07-20 12:00:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:26,384 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-20 12:00:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 12:00:26,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-07-20 12:00:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:26,386 INFO L225 Difference]: With dead ends: 23 [2020-07-20 12:00:26,386 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 12:00:26,387 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 [2020-07-20 12:00:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 12:00:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 12:00:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 12:00:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 12:00:26,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-20 12:00:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:26,393 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 12:00:26,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 12:00:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 12:00:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 12:00:26,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:26,395 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:26,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:26,609 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1866925900, now seen corresponding path program 3 times [2020-07-20 12:00:26,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:26,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914172194] [2020-07-20 12:00:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:00:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:26,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 12:00:26,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:26,762 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 12:00:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:26,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:26,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:00:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:27,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914172194] [2020-07-20 12:00:27,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:27,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-20 12:00:27,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231094136] [2020-07-20 12:00:27,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 12:00:27,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:27,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 12:00:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-20 12:00:27,047 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2020-07-20 12:00:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:27,808 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 12:00:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 12:00:27,809 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2020-07-20 12:00:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:27,810 INFO L225 Difference]: With dead ends: 29 [2020-07-20 12:00:27,810 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 12:00:27,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 12:00:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 12:00:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 12:00:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 12:00:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 12:00:27,828 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-20 12:00:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:27,828 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 12:00:27,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 12:00:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 12:00:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 12:00:27,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:27,834 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:28,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:28,035 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1577490540, now seen corresponding path program 4 times [2020-07-20 12:00:28,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:28,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346861451] [2020-07-20 12:00:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:00:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:28,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 74 conjunts are in the unsatisfiable core [2020-07-20 12:00:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:28,337 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 12:00:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:28,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:28,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:00:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:29,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346861451] [2020-07-20 12:00:29,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:29,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-20 12:00:29,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710474696] [2020-07-20 12:00:29,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 12:00:29,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 12:00:29,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-07-20 12:00:29,072 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 32 states. [2020-07-20 12:00:29,924 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-07-20 12:00:30,227 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-07-20 12:00:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:31,341 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 12:00:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 12:00:31,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 22 [2020-07-20 12:00:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:31,345 INFO L225 Difference]: With dead ends: 41 [2020-07-20 12:00:31,345 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 12:00:31,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=719, Invalid=2587, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 12:00:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 12:00:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 12:00:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 12:00:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-20 12:00:31,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-20 12:00:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:31,365 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-20 12:00:31,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 12:00:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-20 12:00:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 12:00:31,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:31,366 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:31,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:31,568 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -718556500, now seen corresponding path program 5 times [2020-07-20 12:00:31,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:31,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561160918] [2020-07-20 12:00:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:00:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:31,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 146 conjunts are in the unsatisfiable core [2020-07-20 12:00:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:32,282 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 12:00:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:32,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:32,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:00:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:34,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561160918] [2020-07-20 12:00:34,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:34,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 55 [2020-07-20 12:00:34,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828094214] [2020-07-20 12:00:34,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 12:00:34,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 12:00:34,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=2329, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 12:00:34,184 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 55 states. [2020-07-20 12:00:35,797 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-20 12:00:36,213 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 108 [2020-07-20 12:00:36,595 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 12:00:36,936 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 98 [2020-07-20 12:00:37,268 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 12:00:37,669 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 12:00:37,994 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 12:00:38,314 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 12:00:38,624 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 12:00:38,925 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 12:00:39,215 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 12:00:39,478 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 12:00:39,758 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 12:00:42,739 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-20 12:00:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:42,751 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-20 12:00:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-20 12:00:42,752 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 34 [2020-07-20 12:00:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:42,753 INFO L225 Difference]: With dead ends: 65 [2020-07-20 12:00:42,754 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 12:00:42,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2548, Invalid=8372, Unknown=0, NotChecked=0, Total=10920 [2020-07-20 12:00:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 12:00:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-20 12:00:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 12:00:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-20 12:00:42,776 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-20 12:00:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:42,777 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-20 12:00:42,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 12:00:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-20 12:00:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 12:00:42,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:42,779 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:42,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:42,994 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash 944097068, now seen corresponding path program 6 times [2020-07-20 12:00:42,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:42,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818360368] [2020-07-20 12:00:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:00:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:43,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 290 conjunts are in the unsatisfiable core [2020-07-20 12:00:43,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:45,303 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 12:00:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:45,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:45,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:00:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:00:52,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818360368] [2020-07-20 12:00:52,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:52,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 103 [2020-07-20 12:00:52,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691960750] [2020-07-20 12:00:52,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-20 12:00:52,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-20 12:00:52,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=8089, Unknown=0, NotChecked=0, Total=10506 [2020-07-20 12:00:52,122 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 103 states. [2020-07-20 12:00:57,872 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2020-07-20 12:00:59,000 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 204 [2020-07-20 12:01:00,345 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-07-20 12:01:01,285 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 194 [2020-07-20 12:01:02,560 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-07-20 12:01:03,964 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-07-20 12:01:05,200 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-20 12:01:06,421 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-07-20 12:01:07,615 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2020-07-20 12:01:08,790 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-20 12:01:09,984 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-07-20 12:01:11,158 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-20 12:01:12,298 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-20 12:01:13,444 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 12:01:14,549 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-20 12:01:15,642 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-20 12:01:16,726 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-20 12:01:17,814 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-07-20 12:01:18,868 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-20 12:01:19,888 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-20 12:01:20,874 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 12:01:21,853 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 12:01:22,835 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 12:01:23,779 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 12:01:24,699 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-20 12:01:25,603 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-20 12:01:26,456 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 12:01:27,287 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 12:01:28,105 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 12:01:28,921 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 12:01:29,691 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 12:01:30,480 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 12:01:31,221 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 12:01:31,934 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 12:01:32,626 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 12:01:33,296 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 12:01:33,924 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 12:01:34,546 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 12:01:35,138 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 12:01:35,721 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 12:01:41,582 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-07-20 12:01:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:41,597 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-20 12:01:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-20 12:01:41,598 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 58 [2020-07-20 12:01:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:41,600 INFO L225 Difference]: With dead ends: 113 [2020-07-20 12:01:41,601 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 12:01:41,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5183 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=9676, Invalid=30524, Unknown=0, NotChecked=0, Total=40200 [2020-07-20 12:01:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 12:01:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-20 12:01:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 12:01:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-20 12:01:41,644 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-20 12:01:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:41,645 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-20 12:01:41,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-20 12:01:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-20 12:01:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 12:01:41,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:41,647 INFO L422 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:41,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:41,854 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash -679907284, now seen corresponding path program 7 times [2020-07-20 12:01:41,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:41,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4694485] [2020-07-20 12:01:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:01:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:42,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 578 conjunts are in the unsatisfiable core [2020-07-20 12:01:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:53,662 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 12:01:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:01:54,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:54,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:02:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:36,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4694485] [2020-07-20 12:02:36,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:36,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 199 [2020-07-20 12:02:36,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239687614] [2020-07-20 12:02:36,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 199 states [2020-07-20 12:02:36,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2020-07-20 12:02:36,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9425, Invalid=29977, Unknown=0, NotChecked=0, Total=39402 [2020-07-20 12:02:36,201 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 199 states. [2020-07-20 12:03:09,670 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 635 [2020-07-20 12:03:13,743 WARN L193 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 636 DAG size of output: 398 [2020-07-20 12:03:21,996 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 619 [2020-07-20 12:03:25,430 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 624 DAG size of output: 386 [2020-07-20 12:03:33,781 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 613 [2020-07-20 12:03:42,851 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 606 [2020-07-20 12:03:51,758 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 600 [2020-07-20 12:04:00,685 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 593 [2020-07-20 12:04:09,929 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 587 [2020-07-20 12:04:19,566 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 580 [2020-07-20 12:04:29,232 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 574 [2020-07-20 12:04:38,774 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 567 [2020-07-20 12:04:48,425 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 561 [2020-07-20 12:04:59,730 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 554 [2020-07-20 12:05:11,673 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 548 [2020-07-20 12:05:24,688 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 541 [2020-07-20 12:05:37,835 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 535 [2020-07-20 12:05:52,826 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 528 [2020-07-20 12:06:08,125 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 522 [2020-07-20 12:06:25,526 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification that was a NOOP. DAG size: 515 [2020-07-20 12:06:43,306 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification that was a NOOP. DAG size: 509 [2020-07-20 12:07:03,555 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification that was a NOOP. DAG size: 502 [2020-07-20 12:07:23,951 WARN L193 SmtUtils]: Spent 3.95 s on a formula simplification that was a NOOP. DAG size: 496 [2020-07-20 12:07:42,596 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification that was a NOOP. DAG size: 489 [2020-07-20 12:08:01,311 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification that was a NOOP. DAG size: 483 [2020-07-20 12:08:19,851 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification that was a NOOP. DAG size: 476 [2020-07-20 12:08:39,084 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 470 [2020-07-20 12:08:59,343 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification that was a NOOP. DAG size: 463 [2020-07-20 12:09:19,821 WARN L193 SmtUtils]: Spent 3.77 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-20 12:09:40,714 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification that was a NOOP. DAG size: 450 [2020-07-20 12:10:01,863 WARN L193 SmtUtils]: Spent 3.83 s on a formula simplification that was a NOOP. DAG size: 444 [2020-07-20 12:10:24,094 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-20 12:10:46,007 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification that was a NOOP. DAG size: 431 [2020-07-20 12:11:08,599 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification that was a NOOP. DAG size: 424 [2020-07-20 12:11:30,425 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 12:11:52,446 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification that was a NOOP. DAG size: 411 [2020-07-20 12:12:15,323 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification that was a NOOP. DAG size: 405 [2020-07-20 12:12:37,370 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 398 [2020-07-20 12:12:59,925 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-20 12:13:21,993 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 12:13:44,635 WARN L193 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 379 [2020-07-20 12:14:06,907 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-20 12:14:28,934 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification that was a NOOP. DAG size: 366