/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:46:19,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:46:19,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:46:19,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:46:19,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:46:19,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:46:19,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:46:19,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:46:19,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:46:19,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:46:19,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:46:19,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:46:19,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:46:19,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:46:19,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:46:19,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:46:19,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:46:19,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:46:19,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:46:19,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:46:19,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:46:19,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:46:19,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:46:19,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:46:19,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:46:19,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:46:19,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:46:19,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:46:19,240 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 [2020-07-19 21:46:19,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:46:19,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:46:19,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:46:19,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:46:19,276 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:46:19,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:46:19,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:46:19,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:46:19,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:46:19,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:46:19,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:46:19,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:46:19,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:46:19,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:46:19,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:46:19,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:46:19,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:46:19,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:46:19,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:46:19,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:46:19,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:46:19,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:46:19,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:46:19,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:46:19,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:46:19,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:46:19,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:46:19,601 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:46:19,601 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-19 21:46:19,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34008209/7bbe35842f8941f7a8c0442fa43db1d2/FLAGbac5427ca [2020-07-19 21:46:20,113 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:46:20,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-19 21:46:20,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34008209/7bbe35842f8941f7a8c0442fa43db1d2/FLAGbac5427ca [2020-07-19 21:46:20,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34008209/7bbe35842f8941f7a8c0442fa43db1d2 [2020-07-19 21:46:20,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:46:20,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:46:20,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:20,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:46:20,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:46:20,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33761369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20, skipping insertion in model container [2020-07-19 21:46:20,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:46:20,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:46:20,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:20,707 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:46:20,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:20,748 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:46:20,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20 WrapperNode [2020-07-19 21:46:20,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:20,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:46:20,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:46:20,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:46:20,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (1/1) ... [2020-07-19 21:46:20,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:46:20,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:46:20,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:46:20,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:46:20,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (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 [2020-07-19 21:46:20,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:46:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:46:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:46:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:46:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:46:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:46:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:46:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:46:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:46:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:46:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:46:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:46:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:46:20,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:46:21,177 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:46:21,178 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 21:46:21,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:21 BoogieIcfgContainer [2020-07-19 21:46:21,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:46:21,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:46:21,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:46:21,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:46:21,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:46:20" (1/3) ... [2020-07-19 21:46:21,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e3bc57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:21, skipping insertion in model container [2020-07-19 21:46:21,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:20" (2/3) ... [2020-07-19 21:46:21,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e3bc57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:21, skipping insertion in model container [2020-07-19 21:46:21,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:21" (3/3) ... [2020-07-19 21:46:21,189 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-07-19 21:46:21,202 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:46:21,210 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:46:21,224 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:46:21,271 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:46:21,271 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:46:21,271 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:46:21,271 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:46:21,272 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:46:21,272 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:46:21,272 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:46:21,272 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:46:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-19 21:46:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 21:46:21,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:21,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:21,314 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-07-19 21:46:21,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:21,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707336650] [2020-07-19 21:46:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:21,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707336650] [2020-07-19 21:46:21,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:21,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:46:21,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891336898] [2020-07-19 21:46:21,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:46:21,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:46:21,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:46:21,511 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-19 21:46:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:21,610 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-07-19 21:46:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:46:21,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-19 21:46:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:21,621 INFO L225 Difference]: With dead ends: 42 [2020-07-19 21:46:21,621 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 21:46:21,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:46:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 21:46:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 21:46:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 21:46:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-19 21:46:21,657 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-07-19 21:46:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:21,658 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-19 21:46:21,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:46:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-19 21:46:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:46:21,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:21,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:21,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:46:21,661 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-07-19 21:46:21,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:21,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050772175] [2020-07-19 21:46:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:21,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050772175] [2020-07-19 21:46:21,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:21,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:46:21,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701439283] [2020-07-19 21:46:21,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:46:21,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:21,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:46:21,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:46:21,747 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-07-19 21:46:21,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:21,821 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-19 21:46:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:46:21,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-19 21:46:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:21,824 INFO L225 Difference]: With dead ends: 35 [2020-07-19 21:46:21,825 INFO L226 Difference]: Without dead ends: 25 [2020-07-19 21:46:21,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:46:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-19 21:46:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-19 21:46:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 21:46:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-07-19 21:46:21,834 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-07-19 21:46:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:21,835 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-07-19 21:46:21,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:46:21,835 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-07-19 21:46:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 21:46:21,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:21,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:21,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:46:21,837 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-07-19 21:46:21,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:21,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516409338] [2020-07-19 21:46:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:21,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516409338] [2020-07-19 21:46:21,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023214668] [2020-07-19 21:46:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:46:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:22,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:22,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 21:46:22,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265960582] [2020-07-19 21:46:22,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:46:22,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:46:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:46:22,037 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-07-19 21:46:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:22,110 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-07-19 21:46:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:46:22,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-19 21:46:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:22,112 INFO L225 Difference]: With dead ends: 45 [2020-07-19 21:46:22,112 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 21:46:22,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:46:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 21:46:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-19 21:46:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 21:46:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-19 21:46:22,121 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-07-19 21:46:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:22,121 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-19 21:46:22,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:46:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-19 21:46:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 21:46:22,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:22,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:22,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:46:22,339 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:22,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-07-19 21:46:22,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:22,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367451958] [2020-07-19 21:46:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:22,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367451958] [2020-07-19 21:46:22,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046330717] [2020-07-19 21:46:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:22,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:46:22,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:22,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:22,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 21:46:22,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551441436] [2020-07-19 21:46:22,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:46:22,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:22,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:46:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:46:22,513 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-07-19 21:46:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:22,599 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-07-19 21:46:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:46:22,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-19 21:46:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:22,601 INFO L225 Difference]: With dead ends: 56 [2020-07-19 21:46:22,601 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 21:46:22,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:46:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 21:46:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-19 21:46:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 21:46:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-19 21:46:22,610 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-07-19 21:46:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:22,610 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-19 21:46:22,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:46:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-19 21:46:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:46:22,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:22,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:22,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:22,825 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-07-19 21:46:22,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:22,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685635618] [2020-07-19 21:46:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:22,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685635618] [2020-07-19 21:46:22,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081195757] [2020-07-19 21:46:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:23,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:46:23,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:23,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:23,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 21:46:23,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691366677] [2020-07-19 21:46:23,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:46:23,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:46:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:23,039 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2020-07-19 21:46:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:23,148 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-07-19 21:46:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:46:23,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-19 21:46:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:23,150 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:46:23,150 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 21:46:23,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 21:46:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-19 21:46:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-19 21:46:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-19 21:46:23,158 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-07-19 21:46:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:23,158 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-19 21:46:23,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:46:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-19 21:46:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:46:23,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:23,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:23,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:23,361 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:23,366 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-07-19 21:46:23,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:23,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993124656] [2020-07-19 21:46:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:46:23,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993124656] [2020-07-19 21:46:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:23,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:46:23,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448950415] [2020-07-19 21:46:23,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:46:23,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:46:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:46:23,477 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-07-19 21:46:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:23,567 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-19 21:46:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:46:23,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-19 21:46:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:23,570 INFO L225 Difference]: With dead ends: 45 [2020-07-19 21:46:23,570 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 21:46:23,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 21:46:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-19 21:46:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-19 21:46:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-19 21:46:23,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-07-19 21:46:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:23,577 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-19 21:46:23,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:46:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-19 21:46:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:46:23,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:23,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:23,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 21:46:23,579 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-07-19 21:46:23,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:23,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694052661] [2020-07-19 21:46:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:23,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694052661] [2020-07-19 21:46:23,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561437241] [2020-07-19 21:46:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:23,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:46:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:23,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:23,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-19 21:46:23,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707308628] [2020-07-19 21:46:23,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:46:23,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:46:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:46:23,711 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 9 states. [2020-07-19 21:46:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:23,837 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-07-19 21:46:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:46:23,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-19 21:46:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:23,838 INFO L225 Difference]: With dead ends: 77 [2020-07-19 21:46:23,838 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 21:46:23,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:46:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 21:46:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-19 21:46:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 21:46:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-07-19 21:46:23,850 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-07-19 21:46:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:23,851 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-07-19 21:46:23,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:46:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-07-19 21:46:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:46:23,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:23,853 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:24,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:24,069 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-07-19 21:46:24,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:24,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725941426] [2020-07-19 21:46:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:24,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725941426] [2020-07-19 21:46:24,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317240565] [2020-07-19 21:46:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:46:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:24,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:24,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-19 21:46:24,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324254095] [2020-07-19 21:46:24,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:46:24,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:24,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:46:24,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:46:24,266 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 10 states. [2020-07-19 21:46:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:24,407 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-07-19 21:46:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:46:24,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-19 21:46:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:24,409 INFO L225 Difference]: With dead ends: 88 [2020-07-19 21:46:24,409 INFO L226 Difference]: Without dead ends: 59 [2020-07-19 21:46:24,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:46:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-19 21:46:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-07-19 21:46:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-19 21:46:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-19 21:46:24,422 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-07-19 21:46:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:24,424 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-19 21:46:24,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:46:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-19 21:46:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 21:46:24,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:24,425 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:24,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:24,641 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-07-19 21:46:24,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:24,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101791681] [2020-07-19 21:46:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:24,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101791681] [2020-07-19 21:46:24,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529594332] [2020-07-19 21:46:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:46:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:24,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:24,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-19 21:46:24,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769908607] [2020-07-19 21:46:24,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:46:24,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:24,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:46:24,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:46:24,801 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 11 states. [2020-07-19 21:46:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:24,928 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-07-19 21:46:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:46:24,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-19 21:46:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:24,930 INFO L225 Difference]: With dead ends: 99 [2020-07-19 21:46:24,930 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 21:46:24,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:46:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 21:46:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-07-19 21:46:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-19 21:46:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-19 21:46:24,937 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-07-19 21:46:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:24,938 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-19 21:46:24,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:46:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-19 21:46:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 21:46:24,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:24,939 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:25,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:25,154 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-07-19 21:46:25,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:25,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757108537] [2020-07-19 21:46:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:25,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757108537] [2020-07-19 21:46:25,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59343398] [2020-07-19 21:46:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:25,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:46:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:25,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:25,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-19 21:46:25,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631381002] [2020-07-19 21:46:25,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:46:25,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:46:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:46:25,346 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 12 states. [2020-07-19 21:46:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:25,490 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-07-19 21:46:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:46:25,491 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-19 21:46:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:25,492 INFO L225 Difference]: With dead ends: 110 [2020-07-19 21:46:25,492 INFO L226 Difference]: Without dead ends: 73 [2020-07-19 21:46:25,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:46:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-19 21:46:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-07-19 21:46:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-19 21:46:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-07-19 21:46:25,503 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-07-19 21:46:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:25,503 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-07-19 21:46:25,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:46:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-07-19 21:46:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 21:46:25,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:25,504 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:25,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:46:25,708 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-07-19 21:46:25,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:25,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252904345] [2020-07-19 21:46:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:25,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252904345] [2020-07-19 21:46:25,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956409108] [2020-07-19 21:46:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:46:25,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:25,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:25,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-19 21:46:25,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402961336] [2020-07-19 21:46:25,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:46:25,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:46:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:46:25,930 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 13 states. [2020-07-19 21:46:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:26,077 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-07-19 21:46:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:46:26,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-19 21:46:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:26,079 INFO L225 Difference]: With dead ends: 121 [2020-07-19 21:46:26,079 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 21:46:26,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:46:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 21:46:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-07-19 21:46:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-19 21:46:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-07-19 21:46:26,087 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-07-19 21:46:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:26,087 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-07-19 21:46:26,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:46:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-07-19 21:46:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 21:46:26,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:26,088 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:26,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-19 21:46:26,293 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-07-19 21:46:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:26,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65625213] [2020-07-19 21:46:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:26,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65625213] [2020-07-19 21:46:26,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735343028] [2020-07-19 21:46:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:46:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:26,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:26,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-19 21:46:26,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963151458] [2020-07-19 21:46:26,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:46:26,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:46:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:46:26,496 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 14 states. [2020-07-19 21:46:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:26,620 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-07-19 21:46:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:46:26,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-19 21:46:26,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:26,621 INFO L225 Difference]: With dead ends: 132 [2020-07-19 21:46:26,621 INFO L226 Difference]: Without dead ends: 87 [2020-07-19 21:46:26,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:46:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-19 21:46:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-07-19 21:46:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-19 21:46:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-07-19 21:46:26,628 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-07-19 21:46:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:26,629 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-07-19 21:46:26,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:46:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-07-19 21:46:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 21:46:26,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:26,630 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:26,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:26,843 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-07-19 21:46:26,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:26,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075506396] [2020-07-19 21:46:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:26,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075506396] [2020-07-19 21:46:26,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378137067] [2020-07-19 21:46:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:46:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:27,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:27,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-19 21:46:27,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040082754] [2020-07-19 21:46:27,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:46:27,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:46:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:46:27,043 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 15 states. [2020-07-19 21:46:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:27,186 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-07-19 21:46:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:46:27,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-19 21:46:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:27,187 INFO L225 Difference]: With dead ends: 143 [2020-07-19 21:46:27,187 INFO L226 Difference]: Without dead ends: 94 [2020-07-19 21:46:27,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:46:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-19 21:46:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-07-19 21:46:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-19 21:46:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-07-19 21:46:27,195 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-07-19 21:46:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:27,195 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-07-19 21:46:27,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:46:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-07-19 21:46:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:46:27,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:27,196 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:27,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:27,411 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:27,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-07-19 21:46:27,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:27,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857944934] [2020-07-19 21:46:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:27,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857944934] [2020-07-19 21:46:27,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180713843] [2020-07-19 21:46:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:46:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:27,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:27,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-19 21:46:27,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458523961] [2020-07-19 21:46:27,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:46:27,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:46:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:27,635 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 16 states. [2020-07-19 21:46:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:27,790 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-07-19 21:46:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:46:27,791 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-19 21:46:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:27,792 INFO L225 Difference]: With dead ends: 154 [2020-07-19 21:46:27,792 INFO L226 Difference]: Without dead ends: 101 [2020-07-19 21:46:27,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-19 21:46:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-07-19 21:46:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-19 21:46:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-07-19 21:46:27,809 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-07-19 21:46:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:27,810 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-07-19 21:46:27,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:46:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-07-19 21:46:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 21:46:27,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:27,811 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:28,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:46:28,027 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:28,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-07-19 21:46:28,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:28,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311094435] [2020-07-19 21:46:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-19 21:46:28,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311094435] [2020-07-19 21:46:28,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352718281] [2020-07-19 21:46:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:46:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:46:28,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:28,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 19 [2020-07-19 21:46:28,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519445051] [2020-07-19 21:46:28,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:46:28,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:46:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:46:28,334 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 19 states. [2020-07-19 21:46:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:28,586 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-07-19 21:46:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:46:28,587 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-07-19 21:46:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:28,588 INFO L225 Difference]: With dead ends: 167 [2020-07-19 21:46:28,588 INFO L226 Difference]: Without dead ends: 96 [2020-07-19 21:46:28,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:46:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-19 21:46:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-07-19 21:46:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-19 21:46:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-07-19 21:46:28,601 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 42 [2020-07-19 21:46:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:28,602 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-07-19 21:46:28,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:46:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-07-19 21:46:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-19 21:46:28,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:28,609 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:28,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:46:28,819 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash 961768194, now seen corresponding path program 10 times [2020-07-19 21:46:28,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:28,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124216986] [2020-07-19 21:46:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:29,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124216986] [2020-07-19 21:46:29,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054739195] [2020-07-19 21:46:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:29,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:46:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:29,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:29,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-19 21:46:29,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556906765] [2020-07-19 21:46:29,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:46:29,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:46:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:46:29,096 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 18 states. [2020-07-19 21:46:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:29,299 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-07-19 21:46:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:46:29,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2020-07-19 21:46:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:29,301 INFO L225 Difference]: With dead ends: 164 [2020-07-19 21:46:29,302 INFO L226 Difference]: Without dead ends: 103 [2020-07-19 21:46:29,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:46:29,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-19 21:46:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2020-07-19 21:46:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-19 21:46:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-07-19 21:46:29,308 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-07-19 21:46:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:29,308 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-07-19 21:46:29,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:46:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-07-19 21:46:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-19 21:46:29,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:29,310 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:29,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 21:46:29,516 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:29,517 INFO L82 PathProgramCache]: Analyzing trace with hash -662493340, now seen corresponding path program 11 times [2020-07-19 21:46:29,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:29,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637508271] [2020-07-19 21:46:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:29,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637508271] [2020-07-19 21:46:29,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192085417] [2020-07-19 21:46:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:46:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:29,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:29,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-19 21:46:29,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279012491] [2020-07-19 21:46:29,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:46:29,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:29,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:46:29,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:46:29,791 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 19 states. [2020-07-19 21:46:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:29,972 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-07-19 21:46:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:46:29,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-19 21:46:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:29,974 INFO L225 Difference]: With dead ends: 175 [2020-07-19 21:46:29,974 INFO L226 Difference]: Without dead ends: 110 [2020-07-19 21:46:29,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:46:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-19 21:46:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-07-19 21:46:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 21:46:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-07-19 21:46:29,982 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 94 [2020-07-19 21:46:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:29,982 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-07-19 21:46:29,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:46:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-07-19 21:46:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-19 21:46:29,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:29,985 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:30,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:30,186 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:30,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1790268230, now seen corresponding path program 12 times [2020-07-19 21:46:30,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:30,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049977283] [2020-07-19 21:46:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:30,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049977283] [2020-07-19 21:46:30,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990199230] [2020-07-19 21:46:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:46:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:30,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:30,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-19 21:46:30,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886104798] [2020-07-19 21:46:30,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:46:30,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:46:30,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:46:30,605 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 20 states. [2020-07-19 21:46:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:30,841 INFO L93 Difference]: Finished difference Result 186 states and 196 transitions. [2020-07-19 21:46:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:46:30,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 96 [2020-07-19 21:46:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:30,843 INFO L225 Difference]: With dead ends: 186 [2020-07-19 21:46:30,843 INFO L226 Difference]: Without dead ends: 117 [2020-07-19 21:46:30,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:46:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-19 21:46:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-07-19 21:46:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-19 21:46:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2020-07-19 21:46:30,848 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 96 [2020-07-19 21:46:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:30,849 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2020-07-19 21:46:30,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:46:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2020-07-19 21:46:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-19 21:46:30,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:30,850 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:31,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:46:31,062 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash 957091496, now seen corresponding path program 13 times [2020-07-19 21:46:31,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:31,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197508578] [2020-07-19 21:46:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:31,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197508578] [2020-07-19 21:46:31,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048277963] [2020-07-19 21:46:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:46:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:31,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:31,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-19 21:46:31,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110308291] [2020-07-19 21:46:31,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:46:31,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:31,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:46:31,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:46:31,430 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 21 states. [2020-07-19 21:46:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:31,652 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2020-07-19 21:46:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:46:31,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-07-19 21:46:31,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:31,654 INFO L225 Difference]: With dead ends: 197 [2020-07-19 21:46:31,654 INFO L226 Difference]: Without dead ends: 124 [2020-07-19 21:46:31,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:46:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-19 21:46:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2020-07-19 21:46:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-19 21:46:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-07-19 21:46:31,660 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 98 [2020-07-19 21:46:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:31,661 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-07-19 21:46:31,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:46:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-07-19 21:46:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-19 21:46:31,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:31,662 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:31,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:31,863 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash -861832822, now seen corresponding path program 14 times [2020-07-19 21:46:31,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:31,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558489326] [2020-07-19 21:46:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:32,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558489326] [2020-07-19 21:46:32,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350436335] [2020-07-19 21:46:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:46:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:32,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:32,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-19 21:46:32,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682134260] [2020-07-19 21:46:32,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:46:32,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:46:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:46:32,264 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 22 states. [2020-07-19 21:46:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:32,469 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-07-19 21:46:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:46:32,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-07-19 21:46:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:32,471 INFO L225 Difference]: With dead ends: 208 [2020-07-19 21:46:32,471 INFO L226 Difference]: Without dead ends: 131 [2020-07-19 21:46:32,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:46:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-19 21:46:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2020-07-19 21:46:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-19 21:46:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-07-19 21:46:32,478 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 100 [2020-07-19 21:46:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:32,479 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-07-19 21:46:32,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:46:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-07-19 21:46:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-19 21:46:32,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:32,480 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:32,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:32,693 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash -796412948, now seen corresponding path program 15 times [2020-07-19 21:46:32,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:32,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336810122] [2020-07-19 21:46:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:32,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336810122] [2020-07-19 21:46:32,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869338584] [2020-07-19 21:46:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:33,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:46:33,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:33,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:33,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-19 21:46:33,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899833535] [2020-07-19 21:46:33,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:46:33,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:46:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:46:33,043 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 23 states. [2020-07-19 21:46:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:33,274 INFO L93 Difference]: Finished difference Result 219 states and 235 transitions. [2020-07-19 21:46:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:46:33,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-07-19 21:46:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:33,276 INFO L225 Difference]: With dead ends: 219 [2020-07-19 21:46:33,276 INFO L226 Difference]: Without dead ends: 138 [2020-07-19 21:46:33,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:46:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-19 21:46:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-07-19 21:46:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-19 21:46:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-07-19 21:46:33,283 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 102 [2020-07-19 21:46:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:33,283 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-07-19 21:46:33,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:46:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-07-19 21:46:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-19 21:46:33,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:33,285 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:33,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 21:46:33,500 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1942543822, now seen corresponding path program 16 times [2020-07-19 21:46:33,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:33,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798942193] [2020-07-19 21:46:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:33,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798942193] [2020-07-19 21:46:33,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973735531] [2020-07-19 21:46:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:46:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:33,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:33,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-19 21:46:33,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000360646] [2020-07-19 21:46:33,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:46:33,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:33,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:46:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:46:33,992 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 24 states. [2020-07-19 21:46:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:34,292 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2020-07-19 21:46:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:46:34,294 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-07-19 21:46:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:34,295 INFO L225 Difference]: With dead ends: 230 [2020-07-19 21:46:34,295 INFO L226 Difference]: Without dead ends: 145 [2020-07-19 21:46:34,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:46:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-19 21:46:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2020-07-19 21:46:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-19 21:46:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-07-19 21:46:34,300 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 104 [2020-07-19 21:46:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:34,300 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-07-19 21:46:34,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:46:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-07-19 21:46:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-19 21:46:34,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:34,302 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:34,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:34,512 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1265047344, now seen corresponding path program 17 times [2020-07-19 21:46:34,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:34,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831973355] [2020-07-19 21:46:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:34,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831973355] [2020-07-19 21:46:34,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527925325] [2020-07-19 21:46:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:34,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:46:34,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:34,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:34,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-07-19 21:46:34,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685860115] [2020-07-19 21:46:34,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 21:46:34,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 21:46:34,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:46:34,951 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 25 states. [2020-07-19 21:46:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:35,177 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2020-07-19 21:46:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:46:35,178 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 106 [2020-07-19 21:46:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:35,179 INFO L225 Difference]: With dead ends: 241 [2020-07-19 21:46:35,179 INFO L226 Difference]: Without dead ends: 152 [2020-07-19 21:46:35,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:46:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-19 21:46:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 142. [2020-07-19 21:46:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-19 21:46:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-07-19 21:46:35,191 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 106 [2020-07-19 21:46:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:35,192 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-07-19 21:46:35,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 21:46:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-07-19 21:46:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-19 21:46:35,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:35,193 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:35,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 21:46:35,407 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1269006318, now seen corresponding path program 18 times [2020-07-19 21:46:35,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:35,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690542513] [2020-07-19 21:46:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:35,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690542513] [2020-07-19 21:46:35,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822963729] [2020-07-19 21:46:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 21:46:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:35,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:35,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-07-19 21:46:35,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700969043] [2020-07-19 21:46:35,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:46:35,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:35,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:46:35,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:46:35,879 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 26 states. [2020-07-19 21:46:36,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:36,150 INFO L93 Difference]: Finished difference Result 252 states and 274 transitions. [2020-07-19 21:46:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 21:46:36,151 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 108 [2020-07-19 21:46:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:36,152 INFO L225 Difference]: With dead ends: 252 [2020-07-19 21:46:36,153 INFO L226 Difference]: Without dead ends: 159 [2020-07-19 21:46:36,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:46:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-19 21:46:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2020-07-19 21:46:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-19 21:46:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2020-07-19 21:46:36,160 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 108 [2020-07-19 21:46:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:36,160 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2020-07-19 21:46:36,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:46:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2020-07-19 21:46:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-19 21:46:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:36,162 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:36,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 21:46:36,375 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:36,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1248118668, now seen corresponding path program 19 times [2020-07-19 21:46:36,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:36,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136551144] [2020-07-19 21:46:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:36,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136551144] [2020-07-19 21:46:36,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550526811] [2020-07-19 21:46:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:36,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:46:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:36,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:36,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2020-07-19 21:46:36,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028098290] [2020-07-19 21:46:36,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 21:46:36,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 21:46:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:46:36,857 INFO L87 Difference]: Start difference. First operand 148 states and 159 transitions. Second operand 27 states. [2020-07-19 21:46:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:37,169 INFO L93 Difference]: Finished difference Result 263 states and 287 transitions. [2020-07-19 21:46:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:46:37,170 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 110 [2020-07-19 21:46:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:37,171 INFO L225 Difference]: With dead ends: 263 [2020-07-19 21:46:37,171 INFO L226 Difference]: Without dead ends: 166 [2020-07-19 21:46:37,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:46:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-19 21:46:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2020-07-19 21:46:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-19 21:46:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 166 transitions. [2020-07-19 21:46:37,177 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 166 transitions. Word has length 110 [2020-07-19 21:46:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:37,178 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 166 transitions. [2020-07-19 21:46:37,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 21:46:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 166 transitions. [2020-07-19 21:46:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-07-19 21:46:37,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:37,179 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:37,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:37,380 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1645043798, now seen corresponding path program 20 times [2020-07-19 21:46:37,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:37,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284058554] [2020-07-19 21:46:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:37,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284058554] [2020-07-19 21:46:37,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453126943] [2020-07-19 21:46:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 21:46:37,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:37,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:37,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2020-07-19 21:46:37,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268290192] [2020-07-19 21:46:37,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 21:46:37,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 21:46:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:46:37,869 INFO L87 Difference]: Start difference. First operand 154 states and 166 transitions. Second operand 28 states. [2020-07-19 21:46:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:38,168 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-07-19 21:46:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 21:46:38,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-07-19 21:46:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:38,170 INFO L225 Difference]: With dead ends: 274 [2020-07-19 21:46:38,170 INFO L226 Difference]: Without dead ends: 173 [2020-07-19 21:46:38,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:46:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-19 21:46:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2020-07-19 21:46:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-19 21:46:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-07-19 21:46:38,177 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 112 [2020-07-19 21:46:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:38,177 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-07-19 21:46:38,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 21:46:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-07-19 21:46:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-19 21:46:38,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:38,178 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:38,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-19 21:46:38,393 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1164634184, now seen corresponding path program 21 times [2020-07-19 21:46:38,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:38,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054928711] [2020-07-19 21:46:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:38,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054928711] [2020-07-19 21:46:38,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128460265] [2020-07-19 21:46:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:38,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 21:46:38,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:38,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:38,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2020-07-19 21:46:38,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826193246] [2020-07-19 21:46:38,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 21:46:38,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 21:46:38,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:46:38,958 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 29 states. [2020-07-19 21:46:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:39,294 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2020-07-19 21:46:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 21:46:39,297 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2020-07-19 21:46:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:39,298 INFO L225 Difference]: With dead ends: 285 [2020-07-19 21:46:39,298 INFO L226 Difference]: Without dead ends: 180 [2020-07-19 21:46:39,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:46:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-19 21:46:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2020-07-19 21:46:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-19 21:46:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 180 transitions. [2020-07-19 21:46:39,305 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 180 transitions. Word has length 114 [2020-07-19 21:46:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:39,306 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 180 transitions. [2020-07-19 21:46:39,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 21:46:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 180 transitions. [2020-07-19 21:46:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-19 21:46:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:39,307 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:39,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:39,520 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash 269254298, now seen corresponding path program 22 times [2020-07-19 21:46:39,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:39,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750730921] [2020-07-19 21:46:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:39,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750730921] [2020-07-19 21:46:39,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090830567] [2020-07-19 21:46:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 21:46:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:40,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:40,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2020-07-19 21:46:40,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714534609] [2020-07-19 21:46:40,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 21:46:40,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 21:46:40,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:46:40,054 INFO L87 Difference]: Start difference. First operand 166 states and 180 transitions. Second operand 30 states. [2020-07-19 21:46:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:40,352 INFO L93 Difference]: Finished difference Result 296 states and 326 transitions. [2020-07-19 21:46:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 21:46:40,353 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-07-19 21:46:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:40,355 INFO L225 Difference]: With dead ends: 296 [2020-07-19 21:46:40,355 INFO L226 Difference]: Without dead ends: 187 [2020-07-19 21:46:40,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:46:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-19 21:46:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 172. [2020-07-19 21:46:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-19 21:46:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2020-07-19 21:46:40,362 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 116 [2020-07-19 21:46:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:40,362 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2020-07-19 21:46:40,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 21:46:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2020-07-19 21:46:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-19 21:46:40,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:40,363 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:40,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 21:46:40,577 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash -448416516, now seen corresponding path program 23 times [2020-07-19 21:46:40,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:40,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156978239] [2020-07-19 21:46:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:41,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156978239] [2020-07-19 21:46:41,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236915444] [2020-07-19 21:46:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 21:46:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:41,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:41,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2020-07-19 21:46:41,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845876233] [2020-07-19 21:46:41,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 21:46:41,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 21:46:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-19 21:46:41,216 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand 31 states. [2020-07-19 21:46:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:41,599 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-07-19 21:46:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 21:46:41,602 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2020-07-19 21:46:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:41,603 INFO L225 Difference]: With dead ends: 307 [2020-07-19 21:46:41,603 INFO L226 Difference]: Without dead ends: 194 [2020-07-19 21:46:41,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-19 21:46:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-19 21:46:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 178. [2020-07-19 21:46:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-19 21:46:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2020-07-19 21:46:41,616 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 118 [2020-07-19 21:46:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:41,616 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2020-07-19 21:46:41,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 21:46:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2020-07-19 21:46:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-19 21:46:41,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:41,618 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:41,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 21:46:41,832 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:41,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1359665886, now seen corresponding path program 24 times [2020-07-19 21:46:41,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:41,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239892645] [2020-07-19 21:46:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:42,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239892645] [2020-07-19 21:46:42,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35267220] [2020-07-19 21:46:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:42,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 21:46:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:42,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:42,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2020-07-19 21:46:42,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524317595] [2020-07-19 21:46:42,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 21:46:42,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 21:46:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:46:42,471 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand 32 states. [2020-07-19 21:46:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:42,854 INFO L93 Difference]: Finished difference Result 318 states and 352 transitions. [2020-07-19 21:46:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 21:46:42,854 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-07-19 21:46:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:42,856 INFO L225 Difference]: With dead ends: 318 [2020-07-19 21:46:42,856 INFO L226 Difference]: Without dead ends: 201 [2020-07-19 21:46:42,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:46:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-19 21:46:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2020-07-19 21:46:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-19 21:46:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 201 transitions. [2020-07-19 21:46:42,863 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 201 transitions. Word has length 120 [2020-07-19 21:46:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:42,863 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 201 transitions. [2020-07-19 21:46:42,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 21:46:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 201 transitions. [2020-07-19 21:46:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-19 21:46:42,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:42,864 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:43,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:43,067 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash -534900672, now seen corresponding path program 25 times [2020-07-19 21:46:43,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:43,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935808728] [2020-07-19 21:46:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:43,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935808728] [2020-07-19 21:46:43,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307064005] [2020-07-19 21:46:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:43,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 21:46:43,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:43,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:43,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2020-07-19 21:46:43,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929224823] [2020-07-19 21:46:43,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-19 21:46:43,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:43,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-19 21:46:43,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 21:46:43,925 INFO L87 Difference]: Start difference. First operand 184 states and 201 transitions. Second operand 33 states. [2020-07-19 21:46:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:44,435 INFO L93 Difference]: Finished difference Result 329 states and 365 transitions. [2020-07-19 21:46:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 21:46:44,436 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-07-19 21:46:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:44,438 INFO L225 Difference]: With dead ends: 329 [2020-07-19 21:46:44,438 INFO L226 Difference]: Without dead ends: 208 [2020-07-19 21:46:44,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 21:46:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-19 21:46:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-07-19 21:46:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-19 21:46:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 208 transitions. [2020-07-19 21:46:44,445 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 208 transitions. Word has length 122 [2020-07-19 21:46:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:44,446 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 208 transitions. [2020-07-19 21:46:44,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-19 21:46:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 208 transitions. [2020-07-19 21:46:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-19 21:46:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:44,447 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:44,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:44,663 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash -147229406, now seen corresponding path program 26 times [2020-07-19 21:46:44,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:44,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065150130] [2020-07-19 21:46:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:45,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065150130] [2020-07-19 21:46:45,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138968056] [2020-07-19 21:46:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:45,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 21:46:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:45,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:45,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2020-07-19 21:46:45,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170620029] [2020-07-19 21:46:45,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-19 21:46:45,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-19 21:46:45,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:46:45,458 INFO L87 Difference]: Start difference. First operand 190 states and 208 transitions. Second operand 34 states. [2020-07-19 21:46:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:45,930 INFO L93 Difference]: Finished difference Result 340 states and 378 transitions. [2020-07-19 21:46:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 21:46:45,931 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-07-19 21:46:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:45,933 INFO L225 Difference]: With dead ends: 340 [2020-07-19 21:46:45,933 INFO L226 Difference]: Without dead ends: 215 [2020-07-19 21:46:45,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:46:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-19 21:46:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2020-07-19 21:46:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-19 21:46:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2020-07-19 21:46:45,946 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 124 [2020-07-19 21:46:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:45,947 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2020-07-19 21:46:45,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-19 21:46:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2020-07-19 21:46:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-19 21:46:45,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:45,949 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:46,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-19 21:46:46,164 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1257297532, now seen corresponding path program 27 times [2020-07-19 21:46:46,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:46,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516688612] [2020-07-19 21:46:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:46,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516688612] [2020-07-19 21:46:46,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079299721] [2020-07-19 21:46:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:46,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 21:46:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:46,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:46,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2020-07-19 21:46:46,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070821508] [2020-07-19 21:46:46,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-19 21:46:46,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-19 21:46:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:46:46,849 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand 35 states. [2020-07-19 21:46:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:47,219 INFO L93 Difference]: Finished difference Result 351 states and 391 transitions. [2020-07-19 21:46:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 21:46:47,220 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 126 [2020-07-19 21:46:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:47,222 INFO L225 Difference]: With dead ends: 351 [2020-07-19 21:46:47,222 INFO L226 Difference]: Without dead ends: 222 [2020-07-19 21:46:47,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:46:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-19 21:46:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2020-07-19 21:46:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-19 21:46:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 222 transitions. [2020-07-19 21:46:47,228 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 222 transitions. Word has length 126 [2020-07-19 21:46:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:47,229 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 222 transitions. [2020-07-19 21:46:47,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-19 21:46:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 222 transitions. [2020-07-19 21:46:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-19 21:46:47,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:47,230 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:47,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:47,442 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:47,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1414090086, now seen corresponding path program 28 times [2020-07-19 21:46:47,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:47,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743955419] [2020-07-19 21:46:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:48,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743955419] [2020-07-19 21:46:48,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377441650] [2020-07-19 21:46:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 21:46:48,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:48,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:48,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2020-07-19 21:46:48,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399925480] [2020-07-19 21:46:48,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-19 21:46:48,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:48,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-19 21:46:48,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 21:46:48,188 INFO L87 Difference]: Start difference. First operand 202 states and 222 transitions. Second operand 36 states. [2020-07-19 21:46:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:48,626 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2020-07-19 21:46:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 21:46:48,627 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 128 [2020-07-19 21:46:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:48,628 INFO L225 Difference]: With dead ends: 362 [2020-07-19 21:46:48,628 INFO L226 Difference]: Without dead ends: 229 [2020-07-19 21:46:48,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 21:46:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-19 21:46:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2020-07-19 21:46:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-19 21:46:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2020-07-19 21:46:48,635 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 128 [2020-07-19 21:46:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:48,636 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2020-07-19 21:46:48,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-19 21:46:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2020-07-19 21:46:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-19 21:46:48,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:48,637 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:48,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-19 21:46:48,838 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 227147976, now seen corresponding path program 29 times [2020-07-19 21:46:48,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:48,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829211206] [2020-07-19 21:46:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:49,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829211206] [2020-07-19 21:46:49,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013011863] [2020-07-19 21:46:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 21:46:49,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:49,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:49,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2020-07-19 21:46:49,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502460701] [2020-07-19 21:46:49,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-19 21:46:49,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-19 21:46:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 21:46:49,647 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand 37 states. [2020-07-19 21:46:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:50,105 INFO L93 Difference]: Finished difference Result 373 states and 417 transitions. [2020-07-19 21:46:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 21:46:50,106 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 130 [2020-07-19 21:46:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:50,108 INFO L225 Difference]: With dead ends: 373 [2020-07-19 21:46:50,108 INFO L226 Difference]: Without dead ends: 236 [2020-07-19 21:46:50,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 21:46:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-19 21:46:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2020-07-19 21:46:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-19 21:46:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2020-07-19 21:46:50,119 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 130 [2020-07-19 21:46:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:50,119 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2020-07-19 21:46:50,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-19 21:46:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2020-07-19 21:46:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-19 21:46:50,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:50,121 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:50,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-19 21:46:50,337 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2037081002, now seen corresponding path program 30 times [2020-07-19 21:46:50,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:50,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476665385] [2020-07-19 21:46:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:51,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476665385] [2020-07-19 21:46:51,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172879727] [2020-07-19 21:46:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 21:46:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:51,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:51,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2020-07-19 21:46:51,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895322779] [2020-07-19 21:46:51,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 21:46:51,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:51,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 21:46:51,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 21:46:51,327 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 38 states. [2020-07-19 21:46:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:51,848 INFO L93 Difference]: Finished difference Result 384 states and 430 transitions. [2020-07-19 21:46:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-19 21:46:51,848 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2020-07-19 21:46:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:51,849 INFO L225 Difference]: With dead ends: 384 [2020-07-19 21:46:51,849 INFO L226 Difference]: Without dead ends: 243 [2020-07-19 21:46:51,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 21:46:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-19 21:46:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 220. [2020-07-19 21:46:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-19 21:46:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 243 transitions. [2020-07-19 21:46:51,857 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 243 transitions. Word has length 132 [2020-07-19 21:46:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:51,857 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 243 transitions. [2020-07-19 21:46:51,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 21:46:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 243 transitions. [2020-07-19 21:46:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-19 21:46:51,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:51,858 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:52,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-19 21:46:52,066 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:52,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1920964108, now seen corresponding path program 31 times [2020-07-19 21:46:52,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:52,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244963980] [2020-07-19 21:46:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:52,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244963980] [2020-07-19 21:46:52,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375707198] [2020-07-19 21:46:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 21:46:52,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:52,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:52,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2020-07-19 21:46:52,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135862840] [2020-07-19 21:46:52,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-19 21:46:52,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:52,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-19 21:46:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 21:46:52,922 INFO L87 Difference]: Start difference. First operand 220 states and 243 transitions. Second operand 39 states. [2020-07-19 21:46:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:53,377 INFO L93 Difference]: Finished difference Result 395 states and 443 transitions. [2020-07-19 21:46:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-19 21:46:53,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 134 [2020-07-19 21:46:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:53,379 INFO L225 Difference]: With dead ends: 395 [2020-07-19 21:46:53,379 INFO L226 Difference]: Without dead ends: 250 [2020-07-19 21:46:53,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 21:46:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-19 21:46:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2020-07-19 21:46:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-19 21:46:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2020-07-19 21:46:53,387 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 134 [2020-07-19 21:46:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:53,387 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2020-07-19 21:46:53,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-19 21:46:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2020-07-19 21:46:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-19 21:46:53,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:53,388 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:53,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-19 21:46:53,589 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2001778670, now seen corresponding path program 32 times [2020-07-19 21:46:53,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:53,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369604910] [2020-07-19 21:46:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:54,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369604910] [2020-07-19 21:46:54,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562198164] [2020-07-19 21:46:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-19 21:46:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:54,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:54,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2020-07-19 21:46:54,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189914998] [2020-07-19 21:46:54,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-19 21:46:54,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-19 21:46:54,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 21:46:54,500 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand 40 states. [2020-07-19 21:46:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:54,997 INFO L93 Difference]: Finished difference Result 406 states and 456 transitions. [2020-07-19 21:46:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-19 21:46:54,997 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 136 [2020-07-19 21:46:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:54,999 INFO L225 Difference]: With dead ends: 406 [2020-07-19 21:46:54,999 INFO L226 Difference]: Without dead ends: 257 [2020-07-19 21:46:54,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 21:46:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-19 21:46:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 232. [2020-07-19 21:46:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-19 21:46:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 257 transitions. [2020-07-19 21:46:55,005 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 257 transitions. Word has length 136 [2020-07-19 21:46:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:55,006 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 257 transitions. [2020-07-19 21:46:55,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-19 21:46:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 257 transitions. [2020-07-19 21:46:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-19 21:46:55,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:55,007 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:55,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-19 21:46:55,221 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:55,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1939805872, now seen corresponding path program 33 times [2020-07-19 21:46:55,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:55,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871035465] [2020-07-19 21:46:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:56,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871035465] [2020-07-19 21:46:56,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902245277] [2020-07-19 21:46:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 21:46:56,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:56,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:56,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2020-07-19 21:46:56,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571784683] [2020-07-19 21:46:56,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-19 21:46:56,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:56,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-19 21:46:56,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 21:46:56,164 INFO L87 Difference]: Start difference. First operand 232 states and 257 transitions. Second operand 41 states. [2020-07-19 21:46:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:56,670 INFO L93 Difference]: Finished difference Result 417 states and 469 transitions. [2020-07-19 21:46:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-19 21:46:56,671 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 138 [2020-07-19 21:46:56,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:56,673 INFO L225 Difference]: With dead ends: 417 [2020-07-19 21:46:56,673 INFO L226 Difference]: Without dead ends: 264 [2020-07-19 21:46:56,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 21:46:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-19 21:46:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 238. [2020-07-19 21:46:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-19 21:46:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-07-19 21:46:56,685 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 138 [2020-07-19 21:46:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:56,686 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-07-19 21:46:56,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-19 21:46:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-07-19 21:46:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-19 21:46:56,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:56,687 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:56,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-19 21:46:56,900 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:56,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1641395662, now seen corresponding path program 34 times [2020-07-19 21:46:56,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:56,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262597146] [2020-07-19 21:46:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:57,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262597146] [2020-07-19 21:46:57,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207366098] [2020-07-19 21:46:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 21:46:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:57,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:57,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2020-07-19 21:46:57,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896272252] [2020-07-19 21:46:57,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-19 21:46:57,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-19 21:46:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:46:57,887 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 42 states. [2020-07-19 21:46:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:58,409 INFO L93 Difference]: Finished difference Result 428 states and 482 transitions. [2020-07-19 21:46:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-19 21:46:58,410 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 140 [2020-07-19 21:46:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:58,412 INFO L225 Difference]: With dead ends: 428 [2020-07-19 21:46:58,412 INFO L226 Difference]: Without dead ends: 271 [2020-07-19 21:46:58,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:46:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-19 21:46:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 244. [2020-07-19 21:46:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-19 21:46:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 271 transitions. [2020-07-19 21:46:58,420 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 271 transitions. Word has length 140 [2020-07-19 21:46:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:58,420 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 271 transitions. [2020-07-19 21:46:58,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-19 21:46:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 271 transitions. [2020-07-19 21:46:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-19 21:46:58,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:58,421 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:58,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-19 21:46:58,636 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1662974612, now seen corresponding path program 35 times [2020-07-19 21:46:58,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:58,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885786521] [2020-07-19 21:46:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:46:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:59,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885786521] [2020-07-19 21:46:59,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534610053] [2020-07-19 21:46:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 21:46:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:46:59,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:59,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2020-07-19 21:46:59,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606575902] [2020-07-19 21:46:59,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-19 21:46:59,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:59,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-19 21:46:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 21:46:59,682 INFO L87 Difference]: Start difference. First operand 244 states and 271 transitions. Second operand 43 states. [2020-07-19 21:47:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:00,147 INFO L93 Difference]: Finished difference Result 439 states and 495 transitions. [2020-07-19 21:47:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-19 21:47:00,147 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 142 [2020-07-19 21:47:00,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:00,150 INFO L225 Difference]: With dead ends: 439 [2020-07-19 21:47:00,150 INFO L226 Difference]: Without dead ends: 278 [2020-07-19 21:47:00,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 21:47:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-19 21:47:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 250. [2020-07-19 21:47:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-19 21:47:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2020-07-19 21:47:00,157 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 142 [2020-07-19 21:47:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:00,158 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2020-07-19 21:47:00,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-19 21:47:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2020-07-19 21:47:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-07-19 21:47:00,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:00,159 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:00,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:00,373 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:00,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1112991114, now seen corresponding path program 36 times [2020-07-19 21:47:00,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:00,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893376611] [2020-07-19 21:47:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:01,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893376611] [2020-07-19 21:47:01,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51690265] [2020-07-19 21:47:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-19 21:47:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:01,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:01,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2020-07-19 21:47:01,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222954962] [2020-07-19 21:47:01,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-19 21:47:01,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-19 21:47:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 21:47:01,481 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand 44 states. [2020-07-19 21:47:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:02,145 INFO L93 Difference]: Finished difference Result 450 states and 508 transitions. [2020-07-19 21:47:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-19 21:47:02,146 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 144 [2020-07-19 21:47:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:02,148 INFO L225 Difference]: With dead ends: 450 [2020-07-19 21:47:02,148 INFO L226 Difference]: Without dead ends: 285 [2020-07-19 21:47:02,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 21:47:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-19 21:47:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 256. [2020-07-19 21:47:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-19 21:47:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2020-07-19 21:47:02,156 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 144 [2020-07-19 21:47:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:02,157 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2020-07-19 21:47:02,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-19 21:47:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2020-07-19 21:47:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-19 21:47:02,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:02,159 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:02,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:02,374 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1641362984, now seen corresponding path program 37 times [2020-07-19 21:47:02,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:02,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606624397] [2020-07-19 21:47:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:03,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606624397] [2020-07-19 21:47:03,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736110685] [2020-07-19 21:47:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 21:47:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:03,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:03,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2020-07-19 21:47:03,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602950549] [2020-07-19 21:47:03,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-19 21:47:03,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-19 21:47:03,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:47:03,488 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 45 states. [2020-07-19 21:47:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:03,969 INFO L93 Difference]: Finished difference Result 461 states and 521 transitions. [2020-07-19 21:47:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-19 21:47:03,970 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 146 [2020-07-19 21:47:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:03,972 INFO L225 Difference]: With dead ends: 461 [2020-07-19 21:47:03,972 INFO L226 Difference]: Without dead ends: 292 [2020-07-19 21:47:03,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:47:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-19 21:47:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 262. [2020-07-19 21:47:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-19 21:47:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 292 transitions. [2020-07-19 21:47:03,980 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 292 transitions. Word has length 146 [2020-07-19 21:47:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:03,980 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 292 transitions. [2020-07-19 21:47:03,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-19 21:47:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 292 transitions. [2020-07-19 21:47:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-19 21:47:03,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:03,982 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:04,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:04,196 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1694378170, now seen corresponding path program 38 times [2020-07-19 21:47:04,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:04,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785745639] [2020-07-19 21:47:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:05,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785745639] [2020-07-19 21:47:05,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240268050] [2020-07-19 21:47:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:05,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-19 21:47:05,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:05,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:05,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2020-07-19 21:47:05,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464514104] [2020-07-19 21:47:05,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-19 21:47:05,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:05,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-19 21:47:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 21:47:05,351 INFO L87 Difference]: Start difference. First operand 262 states and 292 transitions. Second operand 46 states. [2020-07-19 21:47:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:05,833 INFO L93 Difference]: Finished difference Result 472 states and 534 transitions. [2020-07-19 21:47:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-19 21:47:05,834 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-07-19 21:47:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:05,837 INFO L225 Difference]: With dead ends: 472 [2020-07-19 21:47:05,837 INFO L226 Difference]: Without dead ends: 299 [2020-07-19 21:47:05,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 21:47:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-19 21:47:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 268. [2020-07-19 21:47:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-19 21:47:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 299 transitions. [2020-07-19 21:47:05,844 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 299 transitions. Word has length 148 [2020-07-19 21:47:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:05,845 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 299 transitions. [2020-07-19 21:47:05,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-19 21:47:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 299 transitions. [2020-07-19 21:47:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-19 21:47:05,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:05,846 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:06,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-07-19 21:47:06,062 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash -998942948, now seen corresponding path program 39 times [2020-07-19 21:47:06,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:06,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099217719] [2020-07-19 21:47:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:07,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099217719] [2020-07-19 21:47:07,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419082706] [2020-07-19 21:47:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 21:47:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:07,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:07,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2020-07-19 21:47:07,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451448950] [2020-07-19 21:47:07,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-19 21:47:07,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-19 21:47:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 21:47:07,286 INFO L87 Difference]: Start difference. First operand 268 states and 299 transitions. Second operand 47 states. [2020-07-19 21:47:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:07,830 INFO L93 Difference]: Finished difference Result 483 states and 547 transitions. [2020-07-19 21:47:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-19 21:47:07,831 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 150 [2020-07-19 21:47:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:07,833 INFO L225 Difference]: With dead ends: 483 [2020-07-19 21:47:07,833 INFO L226 Difference]: Without dead ends: 306 [2020-07-19 21:47:07,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 21:47:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-19 21:47:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 274. [2020-07-19 21:47:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-19 21:47:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 306 transitions. [2020-07-19 21:47:07,840 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 306 transitions. Word has length 150 [2020-07-19 21:47:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:07,840 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 306 transitions. [2020-07-19 21:47:07,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-19 21:47:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 306 transitions. [2020-07-19 21:47:07,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-19 21:47:07,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:07,841 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:08,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:08,042 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:08,042 INFO L82 PathProgramCache]: Analyzing trace with hash 584742142, now seen corresponding path program 40 times [2020-07-19 21:47:08,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:08,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202978322] [2020-07-19 21:47:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:09,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202978322] [2020-07-19 21:47:09,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360077448] [2020-07-19 21:47:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-19 21:47:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:09,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:09,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2020-07-19 21:47:09,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728901115] [2020-07-19 21:47:09,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-19 21:47:09,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:09,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-19 21:47:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 21:47:09,245 INFO L87 Difference]: Start difference. First operand 274 states and 306 transitions. Second operand 48 states. [2020-07-19 21:47:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:09,716 INFO L93 Difference]: Finished difference Result 494 states and 560 transitions. [2020-07-19 21:47:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-19 21:47:09,717 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 152 [2020-07-19 21:47:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:09,719 INFO L225 Difference]: With dead ends: 494 [2020-07-19 21:47:09,719 INFO L226 Difference]: Without dead ends: 313 [2020-07-19 21:47:09,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 21:47:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-07-19 21:47:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 280. [2020-07-19 21:47:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-19 21:47:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 313 transitions. [2020-07-19 21:47:09,727 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 313 transitions. Word has length 152 [2020-07-19 21:47:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:09,727 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 313 transitions. [2020-07-19 21:47:09,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-19 21:47:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 313 transitions. [2020-07-19 21:47:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-07-19 21:47:09,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:09,729 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:09,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:09,942 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:09,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2087690848, now seen corresponding path program 41 times [2020-07-19 21:47:09,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:09,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47224116] [2020-07-19 21:47:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:11,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47224116] [2020-07-19 21:47:11,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433401001] [2020-07-19 21:47:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-19 21:47:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:11,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:11,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2020-07-19 21:47:11,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497541949] [2020-07-19 21:47:11,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-19 21:47:11,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-19 21:47:11,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-07-19 21:47:11,230 INFO L87 Difference]: Start difference. First operand 280 states and 313 transitions. Second operand 49 states. [2020-07-19 21:47:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:11,771 INFO L93 Difference]: Finished difference Result 505 states and 573 transitions. [2020-07-19 21:47:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-19 21:47:11,772 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 154 [2020-07-19 21:47:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:11,774 INFO L225 Difference]: With dead ends: 505 [2020-07-19 21:47:11,774 INFO L226 Difference]: Without dead ends: 320 [2020-07-19 21:47:11,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-07-19 21:47:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-07-19 21:47:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 286. [2020-07-19 21:47:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-07-19 21:47:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 320 transitions. [2020-07-19 21:47:11,781 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 320 transitions. Word has length 154 [2020-07-19 21:47:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:11,781 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 320 transitions. [2020-07-19 21:47:11,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-19 21:47:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 320 transitions. [2020-07-19 21:47:11,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-19 21:47:11,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:11,782 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:11,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-19 21:47:11,996 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:11,997 INFO L82 PathProgramCache]: Analyzing trace with hash -982581438, now seen corresponding path program 42 times [2020-07-19 21:47:11,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:11,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742552703] [2020-07-19 21:47:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:13,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742552703] [2020-07-19 21:47:13,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89880942] [2020-07-19 21:47:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:13,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-19 21:47:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:13,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:13,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2020-07-19 21:47:13,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192606157] [2020-07-19 21:47:13,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-19 21:47:13,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-19 21:47:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-07-19 21:47:13,343 INFO L87 Difference]: Start difference. First operand 286 states and 320 transitions. Second operand 50 states. [2020-07-19 21:47:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:13,989 INFO L93 Difference]: Finished difference Result 516 states and 586 transitions. [2020-07-19 21:47:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-19 21:47:13,990 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 156 [2020-07-19 21:47:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:13,992 INFO L225 Difference]: With dead ends: 516 [2020-07-19 21:47:13,992 INFO L226 Difference]: Without dead ends: 327 [2020-07-19 21:47:13,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-07-19 21:47:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-19 21:47:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2020-07-19 21:47:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-07-19 21:47:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 327 transitions. [2020-07-19 21:47:13,999 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 327 transitions. Word has length 156 [2020-07-19 21:47:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:13,999 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 327 transitions. [2020-07-19 21:47:13,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-19 21:47:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 327 transitions. [2020-07-19 21:47:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-19 21:47:14,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:14,000 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:14,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-07-19 21:47:14,215 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash -871715932, now seen corresponding path program 43 times [2020-07-19 21:47:14,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:14,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600524070] [2020-07-19 21:47:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2454 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:15,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600524070] [2020-07-19 21:47:15,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672690052] [2020-07-19 21:47:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:15,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-19 21:47:15,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2454 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:15,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:15,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2020-07-19 21:47:15,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108823098] [2020-07-19 21:47:15,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-19 21:47:15,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-19 21:47:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 21:47:15,620 INFO L87 Difference]: Start difference. First operand 292 states and 327 transitions. Second operand 51 states. [2020-07-19 21:47:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:16,260 INFO L93 Difference]: Finished difference Result 527 states and 599 transitions. [2020-07-19 21:47:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-19 21:47:16,261 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 158 [2020-07-19 21:47:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:16,263 INFO L225 Difference]: With dead ends: 527 [2020-07-19 21:47:16,263 INFO L226 Difference]: Without dead ends: 334 [2020-07-19 21:47:16,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 21:47:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-07-19 21:47:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 298. [2020-07-19 21:47:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-19 21:47:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 334 transitions. [2020-07-19 21:47:16,270 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 334 transitions. Word has length 158 [2020-07-19 21:47:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:16,270 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 334 transitions. [2020-07-19 21:47:16,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-19 21:47:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 334 transitions. [2020-07-19 21:47:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-19 21:47:16,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:16,271 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:16,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-07-19 21:47:16,485 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1704147066, now seen corresponding path program 44 times [2020-07-19 21:47:16,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:16,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57860663] [2020-07-19 21:47:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2547 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:17,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57860663] [2020-07-19 21:47:17,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730743481] [2020-07-19 21:47:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:18,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-19 21:47:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2547 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:18,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:18,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2020-07-19 21:47:18,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183342144] [2020-07-19 21:47:18,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-19 21:47:18,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-19 21:47:18,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-07-19 21:47:18,050 INFO L87 Difference]: Start difference. First operand 298 states and 334 transitions. Second operand 52 states. [2020-07-19 21:47:18,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:18,766 INFO L93 Difference]: Finished difference Result 538 states and 612 transitions. [2020-07-19 21:47:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-19 21:47:18,766 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 160 [2020-07-19 21:47:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:18,768 INFO L225 Difference]: With dead ends: 538 [2020-07-19 21:47:18,769 INFO L226 Difference]: Without dead ends: 341 [2020-07-19 21:47:18,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-07-19 21:47:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-07-19 21:47:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 304. [2020-07-19 21:47:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-19 21:47:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 341 transitions. [2020-07-19 21:47:18,776 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 341 transitions. Word has length 160 [2020-07-19 21:47:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:18,776 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 341 transitions. [2020-07-19 21:47:18,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-19 21:47:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 341 transitions. [2020-07-19 21:47:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-19 21:47:18,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:18,778 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:18,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:18,991 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1488417512, now seen corresponding path program 45 times [2020-07-19 21:47:18,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:18,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510863362] [2020-07-19 21:47:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:20,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510863362] [2020-07-19 21:47:20,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588754769] [2020-07-19 21:47:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:20,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-19 21:47:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:20,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:20,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2020-07-19 21:47:20,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656434074] [2020-07-19 21:47:20,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-19 21:47:20,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:20,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-19 21:47:20,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-07-19 21:47:20,457 INFO L87 Difference]: Start difference. First operand 304 states and 341 transitions. Second operand 53 states. [2020-07-19 21:47:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:21,134 INFO L93 Difference]: Finished difference Result 549 states and 625 transitions. [2020-07-19 21:47:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-19 21:47:21,135 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 162 [2020-07-19 21:47:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:21,137 INFO L225 Difference]: With dead ends: 549 [2020-07-19 21:47:21,137 INFO L226 Difference]: Without dead ends: 348 [2020-07-19 21:47:21,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-07-19 21:47:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-07-19 21:47:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 310. [2020-07-19 21:47:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-07-19 21:47:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 348 transitions. [2020-07-19 21:47:21,143 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 348 transitions. Word has length 162 [2020-07-19 21:47:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:21,143 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 348 transitions. [2020-07-19 21:47:21,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-19 21:47:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 348 transitions. [2020-07-19 21:47:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-19 21:47:21,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:21,144 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:21,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:21,357 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1358639670, now seen corresponding path program 46 times [2020-07-19 21:47:21,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:21,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369921915] [2020-07-19 21:47:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:22,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369921915] [2020-07-19 21:47:22,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126227784] [2020-07-19 21:47:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-19 21:47:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:22,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:22,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2020-07-19 21:47:22,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954121959] [2020-07-19 21:47:22,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-19 21:47:22,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:22,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-19 21:47:22,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:47:22,943 INFO L87 Difference]: Start difference. First operand 310 states and 348 transitions. Second operand 54 states. [2020-07-19 21:47:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:23,639 INFO L93 Difference]: Finished difference Result 560 states and 638 transitions. [2020-07-19 21:47:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-19 21:47:23,640 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 164 [2020-07-19 21:47:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:23,641 INFO L225 Difference]: With dead ends: 560 [2020-07-19 21:47:23,641 INFO L226 Difference]: Without dead ends: 355 [2020-07-19 21:47:23,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:47:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-19 21:47:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 316. [2020-07-19 21:47:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-19 21:47:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 355 transitions. [2020-07-19 21:47:23,649 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 355 transitions. Word has length 164 [2020-07-19 21:47:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:23,649 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 355 transitions. [2020-07-19 21:47:23,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-19 21:47:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 355 transitions. [2020-07-19 21:47:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-07-19 21:47:23,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:23,650 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:23,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:23,864 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1486424020, now seen corresponding path program 47 times [2020-07-19 21:47:23,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:23,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245333229] [2020-07-19 21:47:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:25,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245333229] [2020-07-19 21:47:25,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622289202] [2020-07-19 21:47:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:25,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-19 21:47:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:25,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:25,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2020-07-19 21:47:25,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458476955] [2020-07-19 21:47:25,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-19 21:47:25,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-19 21:47:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 21:47:25,486 INFO L87 Difference]: Start difference. First operand 316 states and 355 transitions. Second operand 55 states. [2020-07-19 21:47:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:26,108 INFO L93 Difference]: Finished difference Result 571 states and 651 transitions. [2020-07-19 21:47:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-19 21:47:26,109 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 166 [2020-07-19 21:47:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:26,111 INFO L225 Difference]: With dead ends: 571 [2020-07-19 21:47:26,112 INFO L226 Difference]: Without dead ends: 362 [2020-07-19 21:47:26,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 21:47:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-19 21:47:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 322. [2020-07-19 21:47:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-07-19 21:47:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 362 transitions. [2020-07-19 21:47:26,119 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 362 transitions. Word has length 166 [2020-07-19 21:47:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:26,119 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 362 transitions. [2020-07-19 21:47:26,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-19 21:47:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 362 transitions. [2020-07-19 21:47:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-19 21:47:26,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:26,120 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:26,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:26,335 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash 266867214, now seen corresponding path program 48 times [2020-07-19 21:47:26,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:26,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283286417] [2020-07-19 21:47:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2939 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:27,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283286417] [2020-07-19 21:47:27,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006043967] [2020-07-19 21:47:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-19 21:47:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2939 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:28,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:28,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2020-07-19 21:47:28,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570596226] [2020-07-19 21:47:28,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-19 21:47:28,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-19 21:47:28,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-07-19 21:47:28,031 INFO L87 Difference]: Start difference. First operand 322 states and 362 transitions. Second operand 56 states. [2020-07-19 21:47:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:28,810 INFO L93 Difference]: Finished difference Result 582 states and 664 transitions. [2020-07-19 21:47:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-19 21:47:28,811 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 168 [2020-07-19 21:47:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:28,813 INFO L225 Difference]: With dead ends: 582 [2020-07-19 21:47:28,813 INFO L226 Difference]: Without dead ends: 369 [2020-07-19 21:47:28,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-07-19 21:47:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-07-19 21:47:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 328. [2020-07-19 21:47:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-07-19 21:47:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 369 transitions. [2020-07-19 21:47:28,819 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 369 transitions. Word has length 168 [2020-07-19 21:47:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:28,819 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 369 transitions. [2020-07-19 21:47:28,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-19 21:47:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 369 transitions. [2020-07-19 21:47:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-19 21:47:28,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:28,820 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:29,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-07-19 21:47:29,034 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1552563056, now seen corresponding path program 49 times [2020-07-19 21:47:29,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:29,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734186664] [2020-07-19 21:47:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:30,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734186664] [2020-07-19 21:47:30,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334229799] [2020-07-19 21:47:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 54 conjunts are in the unsatisfiable core [2020-07-19 21:47:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:30,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:30,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2020-07-19 21:47:30,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013623941] [2020-07-19 21:47:30,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-19 21:47:30,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-19 21:47:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-07-19 21:47:30,789 INFO L87 Difference]: Start difference. First operand 328 states and 369 transitions. Second operand 57 states. [2020-07-19 21:47:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:31,582 INFO L93 Difference]: Finished difference Result 593 states and 677 transitions. [2020-07-19 21:47:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-19 21:47:31,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 170 [2020-07-19 21:47:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:31,585 INFO L225 Difference]: With dead ends: 593 [2020-07-19 21:47:31,585 INFO L226 Difference]: Without dead ends: 376 [2020-07-19 21:47:31,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-07-19 21:47:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-07-19 21:47:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 334. [2020-07-19 21:47:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-07-19 21:47:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 376 transitions. [2020-07-19 21:47:31,591 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 376 transitions. Word has length 170 [2020-07-19 21:47:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:31,591 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 376 transitions. [2020-07-19 21:47:31,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-19 21:47:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 376 transitions. [2020-07-19 21:47:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-07-19 21:47:31,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:31,593 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:31,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:31,807 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:31,807 INFO L82 PathProgramCache]: Analyzing trace with hash 155685970, now seen corresponding path program 50 times [2020-07-19 21:47:31,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:31,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292844774] [2020-07-19 21:47:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3147 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:33,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292844774] [2020-07-19 21:47:33,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466619461] [2020-07-19 21:47:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-19 21:47:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3147 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:33,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:33,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2020-07-19 21:47:33,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880456183] [2020-07-19 21:47:33,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-19 21:47:33,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:33,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-19 21:47:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-07-19 21:47:33,742 INFO L87 Difference]: Start difference. First operand 334 states and 376 transitions. Second operand 58 states. [2020-07-19 21:47:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:34,505 INFO L93 Difference]: Finished difference Result 604 states and 690 transitions. [2020-07-19 21:47:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-19 21:47:34,505 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 172 [2020-07-19 21:47:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:34,508 INFO L225 Difference]: With dead ends: 604 [2020-07-19 21:47:34,508 INFO L226 Difference]: Without dead ends: 383 [2020-07-19 21:47:34,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-07-19 21:47:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-07-19 21:47:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 340. [2020-07-19 21:47:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-07-19 21:47:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 383 transitions. [2020-07-19 21:47:34,514 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 383 transitions. Word has length 172 [2020-07-19 21:47:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:34,515 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 383 transitions. [2020-07-19 21:47:34,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-19 21:47:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 383 transitions. [2020-07-19 21:47:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-07-19 21:47:34,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:34,516 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:34,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-07-19 21:47:34,732 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2081569972, now seen corresponding path program 51 times [2020-07-19 21:47:34,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:34,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042896620] [2020-07-19 21:47:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:36,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042896620] [2020-07-19 21:47:36,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313455194] [2020-07-19 21:47:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-19 21:47:36,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:36,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:36,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2020-07-19 21:47:36,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570395327] [2020-07-19 21:47:36,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-19 21:47:36,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-19 21:47:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-07-19 21:47:36,727 INFO L87 Difference]: Start difference. First operand 340 states and 383 transitions. Second operand 59 states. [2020-07-19 21:47:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:37,607 INFO L93 Difference]: Finished difference Result 615 states and 703 transitions. [2020-07-19 21:47:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-19 21:47:37,608 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 174 [2020-07-19 21:47:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:37,609 INFO L225 Difference]: With dead ends: 615 [2020-07-19 21:47:37,609 INFO L226 Difference]: Without dead ends: 390 [2020-07-19 21:47:37,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-07-19 21:47:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-19 21:47:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 346. [2020-07-19 21:47:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-07-19 21:47:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 390 transitions. [2020-07-19 21:47:37,616 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 390 transitions. Word has length 174 [2020-07-19 21:47:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:37,616 INFO L479 AbstractCegarLoop]: Abstraction has 346 states and 390 transitions. [2020-07-19 21:47:37,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-19 21:47:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 390 transitions. [2020-07-19 21:47:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-19 21:47:37,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:37,617 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:37,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-07-19 21:47:37,831 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1725191318, now seen corresponding path program 52 times [2020-07-19 21:47:37,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:37,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730615692] [2020-07-19 21:47:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:39,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730615692] [2020-07-19 21:47:39,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140842529] [2020-07-19 21:47:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-19 21:47:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:39,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:39,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2020-07-19 21:47:39,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343031172] [2020-07-19 21:47:39,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-19 21:47:39,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:39,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-19 21:47:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 21:47:39,882 INFO L87 Difference]: Start difference. First operand 346 states and 390 transitions. Second operand 60 states. [2020-07-19 21:47:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:40,684 INFO L93 Difference]: Finished difference Result 626 states and 716 transitions. [2020-07-19 21:47:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-19 21:47:40,684 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 176 [2020-07-19 21:47:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:40,687 INFO L225 Difference]: With dead ends: 626 [2020-07-19 21:47:40,687 INFO L226 Difference]: Without dead ends: 397 [2020-07-19 21:47:40,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 21:47:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-07-19 21:47:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 352. [2020-07-19 21:47:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-19 21:47:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 397 transitions. [2020-07-19 21:47:40,693 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 397 transitions. Word has length 176 [2020-07-19 21:47:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:40,693 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 397 transitions. [2020-07-19 21:47:40,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-19 21:47:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 397 transitions. [2020-07-19 21:47:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-19 21:47:40,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:40,694 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:40,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:40,907 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1452278792, now seen corresponding path program 53 times [2020-07-19 21:47:40,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:40,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552781353] [2020-07-19 21:47:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3474 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:42,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552781353] [2020-07-19 21:47:42,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592671076] [2020-07-19 21:47:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 58 conjunts are in the unsatisfiable core [2020-07-19 21:47:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3474 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:43,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:43,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2020-07-19 21:47:43,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105954872] [2020-07-19 21:47:43,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-19 21:47:43,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:43,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-19 21:47:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-07-19 21:47:43,037 INFO L87 Difference]: Start difference. First operand 352 states and 397 transitions. Second operand 61 states. [2020-07-19 21:47:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:43,938 INFO L93 Difference]: Finished difference Result 637 states and 729 transitions. [2020-07-19 21:47:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-19 21:47:43,939 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2020-07-19 21:47:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:43,941 INFO L225 Difference]: With dead ends: 637 [2020-07-19 21:47:43,941 INFO L226 Difference]: Without dead ends: 404 [2020-07-19 21:47:43,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-07-19 21:47:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-07-19 21:47:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 358. [2020-07-19 21:47:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-07-19 21:47:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 404 transitions. [2020-07-19 21:47:43,947 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 404 transitions. Word has length 178 [2020-07-19 21:47:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:43,947 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 404 transitions. [2020-07-19 21:47:43,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-19 21:47:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 404 transitions. [2020-07-19 21:47:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-07-19 21:47:43,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:43,949 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:44,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-07-19 21:47:44,160 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1279307046, now seen corresponding path program 54 times [2020-07-19 21:47:44,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:44,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376015710] [2020-07-19 21:47:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3587 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:46,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376015710] [2020-07-19 21:47:46,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412704960] [2020-07-19 21:47:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-19 21:47:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3587 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:46,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:46,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2020-07-19 21:47:46,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256847897] [2020-07-19 21:47:46,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-19 21:47:46,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:46,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-19 21:47:46,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-07-19 21:47:46,365 INFO L87 Difference]: Start difference. First operand 358 states and 404 transitions. Second operand 62 states. [2020-07-19 21:47:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:47,229 INFO L93 Difference]: Finished difference Result 648 states and 742 transitions. [2020-07-19 21:47:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-19 21:47:47,230 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 180 [2020-07-19 21:47:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:47,232 INFO L225 Difference]: With dead ends: 648 [2020-07-19 21:47:47,233 INFO L226 Difference]: Without dead ends: 411 [2020-07-19 21:47:47,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-07-19 21:47:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-07-19 21:47:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 364. [2020-07-19 21:47:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-07-19 21:47:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 411 transitions. [2020-07-19 21:47:47,238 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 411 transitions. Word has length 180 [2020-07-19 21:47:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:47,238 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 411 transitions. [2020-07-19 21:47:47,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-19 21:47:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 411 transitions. [2020-07-19 21:47:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-19 21:47:47,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:47,239 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:47,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:47,452 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1737783612, now seen corresponding path program 55 times [2020-07-19 21:47:47,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:47,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332702354] [2020-07-19 21:47:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3702 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:49,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332702354] [2020-07-19 21:47:49,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725390701] [2020-07-19 21:47:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:49,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 60 conjunts are in the unsatisfiable core [2020-07-19 21:47:49,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3702 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:49,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:49,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2020-07-19 21:47:49,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262163465] [2020-07-19 21:47:49,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-19 21:47:49,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-19 21:47:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-07-19 21:47:49,742 INFO L87 Difference]: Start difference. First operand 364 states and 411 transitions. Second operand 63 states. [2020-07-19 21:47:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:50,803 INFO L93 Difference]: Finished difference Result 659 states and 755 transitions. [2020-07-19 21:47:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-07-19 21:47:50,803 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2020-07-19 21:47:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:50,805 INFO L225 Difference]: With dead ends: 659 [2020-07-19 21:47:50,805 INFO L226 Difference]: Without dead ends: 418 [2020-07-19 21:47:50,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-07-19 21:47:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-07-19 21:47:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 370. [2020-07-19 21:47:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-07-19 21:47:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 418 transitions. [2020-07-19 21:47:50,810 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 418 transitions. Word has length 182 [2020-07-19 21:47:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:50,810 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 418 transitions. [2020-07-19 21:47:50,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-19 21:47:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 418 transitions. [2020-07-19 21:47:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-07-19 21:47:50,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:50,811 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:51,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-07-19 21:47:51,012 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2058981150, now seen corresponding path program 56 times [2020-07-19 21:47:51,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:51,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095500099] [2020-07-19 21:47:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3819 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:53,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095500099] [2020-07-19 21:47:53,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679602539] [2020-07-19 21:47:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:53,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 61 conjunts are in the unsatisfiable core [2020-07-19 21:47:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3819 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 21:47:53,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:53,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2020-07-19 21:47:53,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133193592] [2020-07-19 21:47:53,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-19 21:47:53,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-19 21:47:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-07-19 21:47:53,367 INFO L87 Difference]: Start difference. First operand 370 states and 418 transitions. Second operand 64 states. [2020-07-19 21:47:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:54,588 INFO L93 Difference]: Finished difference Result 670 states and 768 transitions. [2020-07-19 21:47:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-19 21:47:54,589 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 184 [2020-07-19 21:47:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:54,594 INFO L225 Difference]: With dead ends: 670 [2020-07-19 21:47:54,594 INFO L226 Difference]: Without dead ends: 425 [2020-07-19 21:47:54,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-07-19 21:47:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-07-19 21:47:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 376. [2020-07-19 21:47:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-07-19 21:47:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 425 transitions. [2020-07-19 21:47:54,599 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 425 transitions. Word has length 184 [2020-07-19 21:47:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:54,600 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 425 transitions. [2020-07-19 21:47:54,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-19 21:47:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 425 transitions. [2020-07-19 21:47:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-19 21:47:54,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:54,601 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:54,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:54,802 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1492169856, now seen corresponding path program 57 times [2020-07-19 21:47:54,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:54,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107723534] [2020-07-19 21:47:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79544e47 [2020-07-19 21:47:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3900 trivial. 0 not checked. [2020-07-19 21:47:54,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107723534] [2020-07-19 21:47:54,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:54,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 21:47:54,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425662344] [2020-07-19 21:47:54,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:47:54,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:54,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:47:54,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:47:54,884 INFO L87 Difference]: Start difference. First operand 376 states and 425 transitions. Second operand 7 states. [2020-07-19 21:47:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:54,962 INFO L93 Difference]: Finished difference Result 376 states and 425 transitions. [2020-07-19 21:47:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:47:54,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2020-07-19 21:47:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:54,963 INFO L225 Difference]: With dead ends: 376 [2020-07-19 21:47:54,963 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:47:54,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:47:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:47:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:47:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:47:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:47:54,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2020-07-19 21:47:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:54,966 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:47:54,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:47:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:47:54,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:47:54,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-07-19 21:47:54,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:47:55,133 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:47:55,133 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-19 21:47:55,133 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:47:55,133 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:47:55,134 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:47:55,134 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:47:55,134 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:47:55,134 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-07-19 21:47:55,134 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-07-19 21:47:55,134 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-07-19 21:47:55,134 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-07-19 21:47:55,134 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-07-19 21:47:55,135 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-07-19 21:47:55,135 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-07-19 21:47:55,135 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-07-19 21:47:55,135 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-07-19 21:47:55,135 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-19 21:47:55,135 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-19 21:47:55,135 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-19 21:47:55,135 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-19 21:47:55,136 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-19 21:47:55,136 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 21:47:55,136 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-19 21:47:55,136 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-19 21:47:55,136 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-19 21:47:55,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:47:55 BoogieIcfgContainer [2020-07-19 21:47:55,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:47:55,156 INFO L168 Benchmark]: Toolchain (without parser) took 94646.88 ms. Allocated memory was 146.8 MB in the beginning and 583.5 MB in the end (delta: 436.7 MB). Free memory was 104.2 MB in the beginning and 214.2 MB in the end (delta: -110.0 MB). Peak memory consumption was 326.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:55,156 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-19 21:47:55,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.28 ms. Allocated memory is still 146.8 MB. Free memory was 104.0 MB in the beginning and 94.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:55,157 INFO L168 Benchmark]: Boogie Preprocessor took 130.16 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 94.1 MB in the beginning and 183.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:55,157 INFO L168 Benchmark]: RCFGBuilder took 300.95 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 168.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:55,158 INFO L168 Benchmark]: TraceAbstraction took 93971.01 ms. Allocated memory was 205.0 MB in the beginning and 583.5 MB in the end (delta: 378.5 MB). Free memory was 167.9 MB in the beginning and 214.2 MB in the end (delta: -46.3 MB). Peak memory consumption was 332.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:55,160 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.28 ms. Allocated memory is still 146.8 MB. Free memory was 104.0 MB in the beginning and 94.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.16 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 94.1 MB in the beginning and 183.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.95 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 168.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 93971.01 ms. Allocated memory was 205.0 MB in the beginning and 583.5 MB in the end (delta: 378.5 MB). Free memory was 167.9 MB in the beginning and 214.2 MB in the end (delta: -46.3 MB). Peak memory consumption was 332.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 93.7s, OverallIterations: 63, TraceHistogramMax: 60, AutomataDifference: 26.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 825 SDtfs, 10917 SDslu, 10038 SDs, 0 SdLazy, 18030 SolverSat, 3956 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8873 GetRequests, 6906 SyntacticMatches, 0 SemanticMatches, 1967 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5188 ImplicationChecksByTransitivity, 43.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 63 MinimizatonAttempts, 1318 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 82 PreInvPairs, 217 NumberOfFragments, 23 HoareAnnotationTreeSize, 82 FomulaSimplifications, 413 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 72 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 47.1s InterpolantComputationTime, 13927 NumberOfCodeBlocks, 13927 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 13805 ConstructedInterpolants, 0 QuantifiedInterpolants, 3995845 SizeOfPredicates, 59 NumberOfNonLiveVariables, 17526 ConjunctsInSsa, 1888 ConjunctsInUnsatCore, 122 InterpolantComputations, 4 PerfectInterpolantSequences, 35904/176182 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...