/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.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:36:46,863 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 03:36:46,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:36:46,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:36:46,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:36:46,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:36:46,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:36:46,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:36:46,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:36:46,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:36:46,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:36:46,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:36:46,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:36:46,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:36:46,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:36:46,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:36:46,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:36:46,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:36:46,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:36:46,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:36:46,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:36:46,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:36:46,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:36:46,960 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:36:46,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:36:46,961 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:36:46,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:36:46,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:36:46,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:36:46,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:36:46,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:36:46,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:36:46,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:36:46,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:36:46,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:36:46,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:36:46,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:36:46,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:36:46,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:36:46,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:36:46,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:36:46,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:36:46,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:36:46,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:36:46,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:36:46,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:36:46,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:36:46,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:36:46,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:36:47,233 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:36:47,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:36:47,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:36:47,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:36:47,262 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:36:47,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-07-20 03:36:47,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a128fefc/d21826065e814b29b47ff25a67339178/FLAG09dbf5c8a [2020-07-20 03:36:47,904 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:36:47,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-07-20 03:36:47,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a128fefc/d21826065e814b29b47ff25a67339178/FLAG09dbf5c8a [2020-07-20 03:36:48,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a128fefc/d21826065e814b29b47ff25a67339178 [2020-07-20 03:36:48,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:36:48,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:36:48,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:36:48,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:36:48,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:36:48,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6c299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48, skipping insertion in model container [2020-07-20 03:36:48,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:36:48,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:36:48,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:36:48,683 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:36:48,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:36:48,866 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:36:48,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48 WrapperNode [2020-07-20 03:36:48,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:36:48,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:36:48,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:36:48,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:36:48,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... [2020-07-20 03:36:48,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:36:48,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:36:48,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:36:48,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:36:48,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:36:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:36:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:36:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-07-20 03:36:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:36:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:36:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 03:36:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:36:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-20 03:36:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-07-20 03:36:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-07-20 03:36:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:36:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:36:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:36:49,229 WARN L775 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-07-20 03:36:49,998 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-07-20 03:36:49,999 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-07-20 03:36:50,011 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:36:50,012 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 03:36:50,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:36:50 BoogieIcfgContainer [2020-07-20 03:36:50,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:36:50,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:36:50,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:36:50,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:36:50,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:36:48" (1/3) ... [2020-07-20 03:36:50,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469b7ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:36:50, skipping insertion in model container [2020-07-20 03:36:50,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:48" (2/3) ... [2020-07-20 03:36:50,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469b7ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:36:50, skipping insertion in model container [2020-07-20 03:36:50,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:36:50" (3/3) ... [2020-07-20 03:36:50,026 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-07-20 03:36:50,038 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:36:50,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:36:50,061 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:36:50,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:36:50,089 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:36:50,090 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:36:50,090 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:36:50,090 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:36:50,090 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:36:50,090 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:36:50,090 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:36:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-07-20 03:36:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 03:36:50,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:50,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:50,127 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-07-20 03:36:50,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:50,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621074683] [2020-07-20 03:36:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:50,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621074683] [2020-07-20 03:36:50,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:50,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:50,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303306831] [2020-07-20 03:36:50,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:50,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:50,491 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-07-20 03:36:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:50,892 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-07-20 03:36:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:50,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-20 03:36:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:50,909 INFO L225 Difference]: With dead ends: 362 [2020-07-20 03:36:50,910 INFO L226 Difference]: Without dead ends: 179 [2020-07-20 03:36:50,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-20 03:36:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-07-20 03:36:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-20 03:36:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-07-20 03:36:50,985 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-07-20 03:36:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:50,985 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-07-20 03:36:50,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-07-20 03:36:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 03:36:50,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:50,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:50,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:36:50,989 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:50,989 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-07-20 03:36:50,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:50,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432060449] [2020-07-20 03:36:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:51,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432060449] [2020-07-20 03:36:51,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:51,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:51,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232080495] [2020-07-20 03:36:51,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:51,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:51,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:51,081 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-07-20 03:36:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:51,317 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-07-20 03:36:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:51,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-20 03:36:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:51,320 INFO L225 Difference]: With dead ends: 363 [2020-07-20 03:36:51,320 INFO L226 Difference]: Without dead ends: 199 [2020-07-20 03:36:51,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-07-20 03:36:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-07-20 03:36:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 03:36:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-07-20 03:36:51,339 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-07-20 03:36:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:51,340 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-07-20 03:36:51,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-07-20 03:36:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 03:36:51,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:51,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:51,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:36:51,342 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-07-20 03:36:51,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:51,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489805920] [2020-07-20 03:36:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:51,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489805920] [2020-07-20 03:36:51,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:51,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:51,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368426671] [2020-07-20 03:36:51,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:51,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:51,461 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-07-20 03:36:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:51,720 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-07-20 03:36:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:51,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-20 03:36:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:51,723 INFO L225 Difference]: With dead ends: 393 [2020-07-20 03:36:51,723 INFO L226 Difference]: Without dead ends: 207 [2020-07-20 03:36:51,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:51,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-20 03:36:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-07-20 03:36:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-20 03:36:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-07-20 03:36:51,759 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-07-20 03:36:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:51,759 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-07-20 03:36:51,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-07-20 03:36:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 03:36:51,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:51,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:51,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 03:36:51,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-07-20 03:36:51,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:51,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687648595] [2020-07-20 03:36:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:51,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687648595] [2020-07-20 03:36:51,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:51,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:51,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651987673] [2020-07-20 03:36:51,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:51,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:51,895 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-07-20 03:36:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:52,125 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-07-20 03:36:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:52,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-20 03:36:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:52,128 INFO L225 Difference]: With dead ends: 398 [2020-07-20 03:36:52,129 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 03:36:52,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 03:36:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-20 03:36:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 03:36:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-07-20 03:36:52,160 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-07-20 03:36:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:52,161 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-07-20 03:36:52,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-07-20 03:36:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 03:36:52,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 03:36:52,167 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,167 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-07-20 03:36:52,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034020150] [2020-07-20 03:36:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:52,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034020150] [2020-07-20 03:36:52,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:52,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674236437] [2020-07-20 03:36:52,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:52,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:52,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:52,281 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-07-20 03:36:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:52,498 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-07-20 03:36:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:52,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-07-20 03:36:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:52,501 INFO L225 Difference]: With dead ends: 409 [2020-07-20 03:36:52,501 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 03:36:52,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 03:36:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-07-20 03:36:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 03:36:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-07-20 03:36:52,518 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-07-20 03:36:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:52,521 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-07-20 03:36:52,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-07-20 03:36:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 03:36:52,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 03:36:52,535 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-07-20 03:36:52,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309766504] [2020-07-20 03:36:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:52,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309766504] [2020-07-20 03:36:52,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:52,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666362020] [2020-07-20 03:36:52,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:52,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:52,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:52,589 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-07-20 03:36:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:52,788 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-07-20 03:36:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:52,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-20 03:36:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:52,790 INFO L225 Difference]: With dead ends: 409 [2020-07-20 03:36:52,790 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 03:36:52,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 03:36:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-07-20 03:36:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 03:36:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-07-20 03:36:52,802 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-07-20 03:36:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:52,802 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-07-20 03:36:52,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-07-20 03:36:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:36:52,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 03:36:52,804 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,804 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-07-20 03:36:52,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977310934] [2020-07-20 03:36:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:52,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977310934] [2020-07-20 03:36:52,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:52,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577263056] [2020-07-20 03:36:52,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:52,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:52,853 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-07-20 03:36:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:53,052 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-07-20 03:36:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:53,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-20 03:36:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:53,055 INFO L225 Difference]: With dead ends: 409 [2020-07-20 03:36:53,055 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 03:36:53,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 03:36:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-07-20 03:36:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 03:36:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-07-20 03:36:53,067 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-07-20 03:36:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:53,067 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-07-20 03:36:53,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-07-20 03:36:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:36:53,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:53,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:53,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 03:36:53,069 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:53,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-07-20 03:36:53,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:53,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963356340] [2020-07-20 03:36:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:53,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963356340] [2020-07-20 03:36:53,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:53,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 03:36:53,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516594522] [2020-07-20 03:36:53,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:36:53,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:36:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:53,162 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-07-20 03:36:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:53,516 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-07-20 03:36:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:36:53,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-07-20 03:36:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:53,522 INFO L225 Difference]: With dead ends: 605 [2020-07-20 03:36:53,522 INFO L226 Difference]: Without dead ends: 412 [2020-07-20 03:36:53,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:36:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-07-20 03:36:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-07-20 03:36:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-07-20 03:36:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-07-20 03:36:53,552 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-07-20 03:36:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:53,553 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-07-20 03:36:53,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:36:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-07-20 03:36:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 03:36:53,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:53,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:53,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 03:36:53,555 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:53,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-07-20 03:36:53,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:53,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807014745] [2020-07-20 03:36:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:53,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807014745] [2020-07-20 03:36:53,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:53,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:53,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370815060] [2020-07-20 03:36:53,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:53,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:53,642 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-07-20 03:36:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:53,902 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-07-20 03:36:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:53,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-07-20 03:36:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:53,907 INFO L225 Difference]: With dead ends: 847 [2020-07-20 03:36:53,908 INFO L226 Difference]: Without dead ends: 472 [2020-07-20 03:36:53,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:53,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-07-20 03:36:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-07-20 03:36:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-07-20 03:36:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-07-20 03:36:53,935 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-07-20 03:36:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:53,936 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-07-20 03:36:53,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-07-20 03:36:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 03:36:53,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:53,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:53,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 03:36:53,941 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-07-20 03:36:53,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:53,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964885156] [2020-07-20 03:36:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:54,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964885156] [2020-07-20 03:36:54,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:54,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:54,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601792883] [2020-07-20 03:36:54,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:54,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:54,035 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-07-20 03:36:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:54,349 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-07-20 03:36:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:54,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-07-20 03:36:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:54,355 INFO L225 Difference]: With dead ends: 936 [2020-07-20 03:36:54,355 INFO L226 Difference]: Without dead ends: 495 [2020-07-20 03:36:54,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-07-20 03:36:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-07-20 03:36:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-07-20 03:36:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-07-20 03:36:54,395 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-07-20 03:36:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:54,397 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-07-20 03:36:54,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-07-20 03:36:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:36:54,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:54,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:54,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 03:36:54,400 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-07-20 03:36:54,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:54,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41898736] [2020-07-20 03:36:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:36:54,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41898736] [2020-07-20 03:36:54,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:54,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:54,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415708355] [2020-07-20 03:36:54,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:54,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:54,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:54,513 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-07-20 03:36:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:54,746 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-07-20 03:36:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:54,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-07-20 03:36:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:54,751 INFO L225 Difference]: With dead ends: 993 [2020-07-20 03:36:54,751 INFO L226 Difference]: Without dead ends: 529 [2020-07-20 03:36:54,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-07-20 03:36:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-07-20 03:36:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-07-20 03:36:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-07-20 03:36:54,778 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-07-20 03:36:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:54,779 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-07-20 03:36:54,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:54,779 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-07-20 03:36:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 03:36:54,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:54,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:54,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 03:36:54,781 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-07-20 03:36:54,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:54,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671219429] [2020-07-20 03:36:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:36:54,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671219429] [2020-07-20 03:36:54,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:54,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:54,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679381755] [2020-07-20 03:36:54,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:54,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:54,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:54,849 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-07-20 03:36:55,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:55,128 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-07-20 03:36:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:55,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-07-20 03:36:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:55,132 INFO L225 Difference]: With dead ends: 1027 [2020-07-20 03:36:55,132 INFO L226 Difference]: Without dead ends: 529 [2020-07-20 03:36:55,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-07-20 03:36:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-07-20 03:36:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-07-20 03:36:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-07-20 03:36:55,164 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-07-20 03:36:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:55,164 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-07-20 03:36:55,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-07-20 03:36:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 03:36:55,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:55,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:55,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 03:36:55,167 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:55,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-07-20 03:36:55,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:55,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527320218] [2020-07-20 03:36:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:36:55,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527320218] [2020-07-20 03:36:55,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:55,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:55,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584356506] [2020-07-20 03:36:55,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:55,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:55,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:55,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:55,224 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-07-20 03:36:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:55,505 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-07-20 03:36:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:55,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-07-20 03:36:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:55,509 INFO L225 Difference]: With dead ends: 1074 [2020-07-20 03:36:55,509 INFO L226 Difference]: Without dead ends: 576 [2020-07-20 03:36:55,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-07-20 03:36:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-07-20 03:36:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-07-20 03:36:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-07-20 03:36:55,543 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-07-20 03:36:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:55,545 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-07-20 03:36:55,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-07-20 03:36:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-20 03:36:55,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:55,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:55,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 03:36:55,547 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:55,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-07-20 03:36:55,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:55,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974228337] [2020-07-20 03:36:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:55,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974228337] [2020-07-20 03:36:55,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:55,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:55,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666119508] [2020-07-20 03:36:55,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:55,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:55,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:55,619 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-07-20 03:36:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:55,886 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-07-20 03:36:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:55,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-07-20 03:36:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:55,890 INFO L225 Difference]: With dead ends: 1184 [2020-07-20 03:36:55,890 INFO L226 Difference]: Without dead ends: 623 [2020-07-20 03:36:55,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-07-20 03:36:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-07-20 03:36:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-07-20 03:36:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-07-20 03:36:55,921 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-07-20 03:36:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:55,921 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-07-20 03:36:55,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-07-20 03:36:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 03:36:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:55,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:55,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 03:36:55,924 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-07-20 03:36:55,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:55,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440020587] [2020-07-20 03:36:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:56,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440020587] [2020-07-20 03:36:56,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:56,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:56,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803696487] [2020-07-20 03:36:56,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:56,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:56,009 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-07-20 03:36:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:56,271 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-07-20 03:36:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:56,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-07-20 03:36:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:56,277 INFO L225 Difference]: With dead ends: 1227 [2020-07-20 03:36:56,278 INFO L226 Difference]: Without dead ends: 623 [2020-07-20 03:36:56,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-07-20 03:36:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-07-20 03:36:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-07-20 03:36:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-07-20 03:36:56,375 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-07-20 03:36:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:56,375 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-07-20 03:36:56,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-07-20 03:36:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-20 03:36:56,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:56,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:56,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 03:36:56,380 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-07-20 03:36:56,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:56,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202314497] [2020-07-20 03:36:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:36:56,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202314497] [2020-07-20 03:36:56,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:56,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:56,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418702126] [2020-07-20 03:36:56,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:56,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:56,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:56,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:56,505 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-07-20 03:36:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:56,847 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-07-20 03:36:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:56,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-07-20 03:36:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:56,852 INFO L225 Difference]: With dead ends: 1223 [2020-07-20 03:36:56,853 INFO L226 Difference]: Without dead ends: 619 [2020-07-20 03:36:56,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-07-20 03:36:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-07-20 03:36:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-07-20 03:36:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-07-20 03:36:56,909 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-07-20 03:36:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:56,910 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-07-20 03:36:56,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-07-20 03:36:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-20 03:36:56,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:56,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:56,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 03:36:56,914 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:56,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-07-20 03:36:56,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:56,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259394661] [2020-07-20 03:36:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-20 03:36:56,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259394661] [2020-07-20 03:36:56,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:56,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:56,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495888380] [2020-07-20 03:36:56,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:56,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:56,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:56,997 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-07-20 03:36:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:57,299 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-07-20 03:36:57,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:57,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-07-20 03:36:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:57,303 INFO L225 Difference]: With dead ends: 1281 [2020-07-20 03:36:57,304 INFO L226 Difference]: Without dead ends: 677 [2020-07-20 03:36:57,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-07-20 03:36:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-07-20 03:36:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-07-20 03:36:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-07-20 03:36:57,352 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-07-20 03:36:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:57,352 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-07-20 03:36:57,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-07-20 03:36:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-20 03:36:57,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:57,356 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:57,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 03:36:57,356 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-07-20 03:36:57,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:57,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195153518] [2020-07-20 03:36:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-20 03:36:57,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195153518] [2020-07-20 03:36:57,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:57,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:57,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92762258] [2020-07-20 03:36:57,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:57,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:57,427 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-07-20 03:36:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:57,694 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-07-20 03:36:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:57,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-07-20 03:36:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:57,700 INFO L225 Difference]: With dead ends: 1313 [2020-07-20 03:36:57,700 INFO L226 Difference]: Without dead ends: 677 [2020-07-20 03:36:57,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-07-20 03:36:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-07-20 03:36:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-07-20 03:36:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-07-20 03:36:57,751 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-07-20 03:36:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:57,751 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-07-20 03:36:57,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-07-20 03:36:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-20 03:36:57,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:57,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:57,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 03:36:57,754 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-07-20 03:36:57,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:57,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762263797] [2020-07-20 03:36:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:36:57,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762263797] [2020-07-20 03:36:57,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:57,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:57,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492131105] [2020-07-20 03:36:57,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:57,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:57,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:57,836 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-07-20 03:36:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:58,207 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-07-20 03:36:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:58,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-07-20 03:36:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:58,212 INFO L225 Difference]: With dead ends: 1349 [2020-07-20 03:36:58,212 INFO L226 Difference]: Without dead ends: 713 [2020-07-20 03:36:58,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-07-20 03:36:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-07-20 03:36:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-07-20 03:36:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-07-20 03:36:58,282 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-07-20 03:36:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:58,282 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-07-20 03:36:58,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-07-20 03:36:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 03:36:58,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:58,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:58,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-20 03:36:58,287 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:58,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-07-20 03:36:58,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:58,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588075418] [2020-07-20 03:36:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:36:58,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588075418] [2020-07-20 03:36:58,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:58,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:58,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453468730] [2020-07-20 03:36:58,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:58,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:58,364 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-07-20 03:36:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:58,788 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-07-20 03:36:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:58,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-07-20 03:36:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:58,792 INFO L225 Difference]: With dead ends: 1406 [2020-07-20 03:36:58,792 INFO L226 Difference]: Without dead ends: 714 [2020-07-20 03:36:58,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-07-20 03:36:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-07-20 03:36:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-07-20 03:36:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-07-20 03:36:58,849 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-07-20 03:36:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:58,849 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-07-20 03:36:58,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-07-20 03:36:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 03:36:58,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:58,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:58,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-20 03:36:58,854 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:58,855 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-07-20 03:36:58,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:58,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134792507] [2020-07-20 03:36:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-20 03:36:58,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134792507] [2020-07-20 03:36:58,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:58,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:58,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412074972] [2020-07-20 03:36:58,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:58,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:58,931 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-07-20 03:36:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:59,273 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-07-20 03:36:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:59,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-07-20 03:36:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:59,278 INFO L225 Difference]: With dead ends: 1438 [2020-07-20 03:36:59,278 INFO L226 Difference]: Without dead ends: 749 [2020-07-20 03:36:59,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-07-20 03:36:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-07-20 03:36:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-07-20 03:36:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-07-20 03:36:59,325 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-07-20 03:36:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:59,326 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-07-20 03:36:59,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-07-20 03:36:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-20 03:36:59,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:59,329 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:59,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 03:36:59,329 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-07-20 03:36:59,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:59,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481431988] [2020-07-20 03:36:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-20 03:36:59,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481431988] [2020-07-20 03:36:59,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:59,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:59,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156160712] [2020-07-20 03:36:59,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:59,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:59,402 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-07-20 03:36:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:59,668 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-07-20 03:36:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:36:59,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-07-20 03:36:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:59,673 INFO L225 Difference]: With dead ends: 1479 [2020-07-20 03:36:59,673 INFO L226 Difference]: Without dead ends: 749 [2020-07-20 03:36:59,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:36:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-07-20 03:36:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-07-20 03:36:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-07-20 03:36:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-07-20 03:36:59,713 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-07-20 03:36:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:59,713 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-07-20 03:36:59,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:36:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-07-20 03:36:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-20 03:36:59,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:59,716 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:59,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-20 03:36:59,716 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:59,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-07-20 03:36:59,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:59,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197001852] [2020-07-20 03:36:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:36:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-20 03:36:59,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197001852] [2020-07-20 03:36:59,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:59,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:36:59,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378747408] [2020-07-20 03:36:59,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:36:59,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:36:59,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:36:59,787 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-07-20 03:37:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:00,046 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-07-20 03:37:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:00,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-07-20 03:37:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:00,053 INFO L225 Difference]: With dead ends: 1515 [2020-07-20 03:37:00,053 INFO L226 Difference]: Without dead ends: 785 [2020-07-20 03:37:00,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-07-20 03:37:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-07-20 03:37:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-07-20 03:37:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-07-20 03:37:00,104 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-07-20 03:37:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:00,104 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-07-20 03:37:00,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-07-20 03:37:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 03:37:00,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:00,107 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:00,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-20 03:37:00,108 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-07-20 03:37:00,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:00,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127528679] [2020-07-20 03:37:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-20 03:37:00,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127528679] [2020-07-20 03:37:00,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:00,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:37:00,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463992359] [2020-07-20 03:37:00,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:37:00,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:37:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:37:00,179 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-07-20 03:37:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:00,446 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-07-20 03:37:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:00,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-07-20 03:37:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:00,451 INFO L225 Difference]: With dead ends: 1547 [2020-07-20 03:37:00,451 INFO L226 Difference]: Without dead ends: 785 [2020-07-20 03:37:00,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-07-20 03:37:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-07-20 03:37:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-07-20 03:37:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-07-20 03:37:00,498 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-07-20 03:37:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:00,498 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-07-20 03:37:00,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-07-20 03:37:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 03:37:00,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:00,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:00,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-20 03:37:00,502 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:00,502 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-07-20 03:37:00,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:00,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536945815] [2020-07-20 03:37:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-07-20 03:37:00,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536945815] [2020-07-20 03:37:00,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:00,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:37:00,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740452190] [2020-07-20 03:37:00,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:37:00,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:00,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:37:00,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:37:00,564 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-07-20 03:37:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:00,834 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-07-20 03:37:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:00,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-07-20 03:37:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:00,841 INFO L225 Difference]: With dead ends: 1573 [2020-07-20 03:37:00,841 INFO L226 Difference]: Without dead ends: 811 [2020-07-20 03:37:00,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-07-20 03:37:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-07-20 03:37:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-07-20 03:37:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-07-20 03:37:00,921 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-07-20 03:37:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:00,921 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-07-20 03:37:00,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-07-20 03:37:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-20 03:37:00,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:00,925 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:00,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-20 03:37:00,925 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-07-20 03:37:00,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:00,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630246121] [2020-07-20 03:37:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-07-20 03:37:00,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630246121] [2020-07-20 03:37:00,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:00,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:37:00,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995701819] [2020-07-20 03:37:00,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:37:00,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:37:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:37:00,987 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-07-20 03:37:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:01,237 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-07-20 03:37:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:01,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-07-20 03:37:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:01,242 INFO L225 Difference]: With dead ends: 1601 [2020-07-20 03:37:01,243 INFO L226 Difference]: Without dead ends: 811 [2020-07-20 03:37:01,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-07-20 03:37:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-07-20 03:37:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-07-20 03:37:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-07-20 03:37:01,301 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-07-20 03:37:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:01,302 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-07-20 03:37:01,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-07-20 03:37:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-20 03:37:01,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:01,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:01,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-20 03:37:01,306 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:01,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:01,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-07-20 03:37:01,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:01,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613777734] [2020-07-20 03:37:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 03:37:01,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613777734] [2020-07-20 03:37:01,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:01,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:37:01,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838708822] [2020-07-20 03:37:01,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:37:01,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:37:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:37:01,377 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-07-20 03:37:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:01,642 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-07-20 03:37:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:01,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-07-20 03:37:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:01,647 INFO L225 Difference]: With dead ends: 1656 [2020-07-20 03:37:01,648 INFO L226 Difference]: Without dead ends: 866 [2020-07-20 03:37:01,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-07-20 03:37:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-07-20 03:37:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-07-20 03:37:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-07-20 03:37:01,697 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-07-20 03:37:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:01,697 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-07-20 03:37:01,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-07-20 03:37:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-20 03:37:01,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:01,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:01,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-20 03:37:01,700 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-07-20 03:37:01,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:01,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718750145] [2020-07-20 03:37:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 03:37:01,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718750145] [2020-07-20 03:37:01,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:01,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:37:01,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451691568] [2020-07-20 03:37:01,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:37:01,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:37:01,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:37:01,774 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-07-20 03:37:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:02,075 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-07-20 03:37:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:02,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-07-20 03:37:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:02,080 INFO L225 Difference]: With dead ends: 1705 [2020-07-20 03:37:02,080 INFO L226 Difference]: Without dead ends: 850 [2020-07-20 03:37:02,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-07-20 03:37:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-07-20 03:37:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-07-20 03:37:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-07-20 03:37:02,128 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-07-20 03:37:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:02,129 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-07-20 03:37:02,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-07-20 03:37:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-20 03:37:02,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:02,132 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:02,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-20 03:37:02,132 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-07-20 03:37:02,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:02,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522358117] [2020-07-20 03:37:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-20 03:37:02,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522358117] [2020-07-20 03:37:02,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:02,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:37:02,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696518574] [2020-07-20 03:37:02,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:37:02,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:37:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:37:02,202 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-07-20 03:37:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:02,458 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-07-20 03:37:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:02,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-07-20 03:37:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:02,463 INFO L225 Difference]: With dead ends: 1671 [2020-07-20 03:37:02,463 INFO L226 Difference]: Without dead ends: 848 [2020-07-20 03:37:02,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-07-20 03:37:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-07-20 03:37:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-07-20 03:37:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-07-20 03:37:02,513 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-07-20 03:37:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:02,513 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-07-20 03:37:02,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-07-20 03:37:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-20 03:37:02,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:02,516 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:02,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-20 03:37:02,517 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-07-20 03:37:02,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:02,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74361421] [2020-07-20 03:37:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-20 03:37:02,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74361421] [2020-07-20 03:37:02,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:02,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:37:02,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006266949] [2020-07-20 03:37:02,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:37:02,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:37:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:37:02,580 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-07-20 03:37:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:02,846 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-07-20 03:37:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:37:02,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-07-20 03:37:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:02,851 INFO L225 Difference]: With dead ends: 1671 [2020-07-20 03:37:02,851 INFO L226 Difference]: Without dead ends: 831 [2020-07-20 03:37:02,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:37:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-07-20 03:37:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-07-20 03:37:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-07-20 03:37:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-07-20 03:37:02,911 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-07-20 03:37:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:02,911 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-07-20 03:37:02,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:37:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-07-20 03:37:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-20 03:37:02,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:02,914 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:02,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-20 03:37:02,915 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:02,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:02,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-07-20 03:37:02,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:02,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276048473] [2020-07-20 03:37:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-20 03:37:03,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276048473] [2020-07-20 03:37:03,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:03,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:37:03,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820794639] [2020-07-20 03:37:03,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:37:03,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:37:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:37:03,008 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-07-20 03:37:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:03,094 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-07-20 03:37:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:37:03,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-07-20 03:37:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:03,102 INFO L225 Difference]: With dead ends: 2417 [2020-07-20 03:37:03,102 INFO L226 Difference]: Without dead ends: 1611 [2020-07-20 03:37:03,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:37:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-07-20 03:37:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-07-20 03:37:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-07-20 03:37:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-07-20 03:37:03,161 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-07-20 03:37:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:03,161 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-07-20 03:37:03,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:37:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-07-20 03:37:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-20 03:37:03,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:03,164 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:03,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-20 03:37:03,164 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:03,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-07-20 03:37:03,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:03,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756368651] [2020-07-20 03:37:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-07-20 03:37:03,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756368651] [2020-07-20 03:37:03,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:37:03,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:37:03,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604188763] [2020-07-20 03:37:03,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:37:03,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:37:03,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:37:03,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:37:03,235 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-07-20 03:37:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:37:03,332 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-07-20 03:37:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:37:03,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-07-20 03:37:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:37:03,340 INFO L225 Difference]: With dead ends: 2416 [2020-07-20 03:37:03,341 INFO L226 Difference]: Without dead ends: 1608 [2020-07-20 03:37:03,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:37:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-07-20 03:37:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-07-20 03:37:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-07-20 03:37:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-07-20 03:37:03,435 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-07-20 03:37:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:37:03,435 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-07-20 03:37:03,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:37:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-07-20 03:37:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-20 03:37:03,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:37:03,438 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:37:03,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-20 03:37:03,439 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:37:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:37:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-07-20 03:37:03,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:37:03,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442427550] [2020-07-20 03:37:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2888f4 [2020-07-20 03:37:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:37:03,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-20 03:37:03,552 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Asserted terms must be closed at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkFinalInterpolants(InterpolantChecker.java:423) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:218) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:874) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-20 03:37:03,565 INFO L168 Benchmark]: Toolchain (without parser) took 15248.86 ms. Allocated memory was 138.9 MB in the beginning and 465.0 MB in the end (delta: 326.1 MB). Free memory was 102.9 MB in the beginning and 136.5 MB in the end (delta: -33.7 MB). Peak memory consumption was 292.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:37:03,566 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 138.9 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 03:37:03,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 553.79 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.4 MB in the beginning and 178.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:37:03,569 INFO L168 Benchmark]: Boogie Preprocessor took 93.49 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 175.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:37:03,569 INFO L168 Benchmark]: RCFGBuilder took 1051.43 ms. Allocated memory is still 203.4 MB. Free memory was 175.3 MB in the beginning and 117.3 MB in the end (delta: 57.9 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:37:03,570 INFO L168 Benchmark]: TraceAbstraction took 13539.42 ms. Allocated memory was 203.4 MB in the beginning and 465.0 MB in the end (delta: 261.6 MB). Free memory was 117.3 MB in the beginning and 136.5 MB in the end (delta: -19.2 MB). Peak memory consumption was 242.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:37:03,572 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 138.9 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 553.79 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.4 MB in the beginning and 178.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 93.49 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 175.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1051.43 ms. Allocated memory is still 203.4 MB. Free memory was 175.3 MB in the beginning and 117.3 MB in the end (delta: 57.9 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13539.42 ms. Allocated memory was 203.4 MB in the beginning and 465.0 MB in the end (delta: 261.6 MB). Free memory was 117.3 MB in the beginning and 136.5 MB in the end (delta: -19.2 MB). Peak memory consumption was 242.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Asserted terms must be closed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Asserted terms must be closed: de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...