/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 NUM_FUNCTIONS --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/recursive-simple/id_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:17:23,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:17:23,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:17:23,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:17:23,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:17:23,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:17:24,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:17:24,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:17:24,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:17:24,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:17:24,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:17:24,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:17:24,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:17:24,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:17:24,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:17:24,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:17:24,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:17:24,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:17:24,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:17:24,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:17:24,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:17:24,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:17:24,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:17:24,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:17:24,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:17:24,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:17:24,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:17:24,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:17:24,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:17:24,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:17:24,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:17:24,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:17:24,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:17:24,055 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:17:24,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:17:24,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:17:24,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:17:24,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:17:24,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:17:24,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:17:24,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:17:24,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:17:24,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:17:24,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:17:24,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:17:24,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:17:24,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:17:24,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:17:24,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:17:24,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:17:24,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:24,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:17:24,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:17:24,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:17:24,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:17:24,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:17:24,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:17:24,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:17:24,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:17:24,351 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:17:24,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:17:24,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:17:24,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:17:24,371 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:17:24,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-07-19 23:17:24,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f651c5c7/3da27567001241e5b011a8e4774bf68d/FLAG9812da78e [2020-07-19 23:17:24,944 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:17:24,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-07-19 23:17:24,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f651c5c7/3da27567001241e5b011a8e4774bf68d/FLAG9812da78e [2020-07-19 23:17:25,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f651c5c7/3da27567001241e5b011a8e4774bf68d [2020-07-19 23:17:25,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:17:25,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:17:25,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:25,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:17:25,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:17:25,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ecf16ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25, skipping insertion in model container [2020-07-19 23:17:25,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:17:25,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:17:25,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:25,680 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:17:25,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:25,717 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:17:25,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25 WrapperNode [2020-07-19 23:17:25,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:25,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:17:25,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:17:25,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:17:25,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... [2020-07-19 23:17:25,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:17:25,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:17:25,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:17:25,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:17:25,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:25,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:17:25,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:17:25,909 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-19 23:17:25,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:17:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:17:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:17:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-19 23:17:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:17:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:17:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:17:26,073 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:17:26,074 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:17:26,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:26 BoogieIcfgContainer [2020-07-19 23:17:26,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:17:26,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:17:26,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:17:26,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:17:26,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:17:25" (1/3) ... [2020-07-19 23:17:26,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241aa728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:26, skipping insertion in model container [2020-07-19 23:17:26,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:25" (2/3) ... [2020-07-19 23:17:26,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241aa728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:26, skipping insertion in model container [2020-07-19 23:17:26,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:26" (3/3) ... [2020-07-19 23:17:26,090 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2020-07-19 23:17:26,102 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:17:26,111 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:17:26,125 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:17:26,147 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:17:26,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:17:26,148 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:17:26,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:17:26,148 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:17:26,148 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:17:26,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:17:26,149 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:17:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 23:17:26,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:17:26,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:26,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:26,175 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:26,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:26,182 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-19 23:17:26,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:26,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011125503] [2020-07-19 23:17:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:17:26,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011125503] [2020-07-19 23:17:26,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:17:26,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:17:26,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122915563] [2020-07-19 23:17:26,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:17:26,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:17:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:17:26,483 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-19 23:17:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:26,580 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-19 23:17:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:17:26,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:17:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:26,593 INFO L225 Difference]: With dead ends: 30 [2020-07-19 23:17:26,593 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:17:26,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:17:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:17:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 23:17:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 23:17:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 23:17:26,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 23:17:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:26,640 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 23:17:26,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:17:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 23:17:26,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 23:17:26,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:26,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:26,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:17:26,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-19 23:17:26,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:26,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406011222] [2020-07-19 23:17:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:26,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406011222] [2020-07-19 23:17:26,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011293773] [2020-07-19 23:17:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44d06471 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:26,836 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44d06471 issued 3 check-sat command(s) [2020-07-19 23:17:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:17:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:26,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:26,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-19 23:17:26,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101196199] [2020-07-19 23:17:26,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:17:26,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:26,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:17:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:17:26,934 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-19 23:17:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:26,997 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-19 23:17:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:17:26,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-19 23:17:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:27,000 INFO L225 Difference]: With dead ends: 25 [2020-07-19 23:17:27,000 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:17:27,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:17:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:17:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:17:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:17:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 23:17:27,009 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-19 23:17:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:27,010 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 23:17:27,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:17:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 23:17:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 23:17:27,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:27,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:27,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:17:27,228 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-19 23:17:27,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:27,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916557482] [2020-07-19 23:17:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:27,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916557482] [2020-07-19 23:17:27,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595358349] [2020-07-19 23:17:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b083a9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:27,427 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b083a9 issued 3 check-sat command(s) [2020-07-19 23:17:27,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:17:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:27,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:27,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-19 23:17:27,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723196332] [2020-07-19 23:17:27,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:17:27,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:17:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:17:27,505 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-19 23:17:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:27,601 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-19 23:17:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:17:27,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-19 23:17:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:27,604 INFO L225 Difference]: With dead ends: 28 [2020-07-19 23:17:27,604 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:17:27,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:17:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:17:27,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 23:17:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 23:17:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-19 23:17:27,622 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-19 23:17:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:27,623 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-19 23:17:27,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:17:27,623 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-19 23:17:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:17:27,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:27,625 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:27,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:27,836 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:27,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-19 23:17:27,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:27,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28250892] [2020-07-19 23:17:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:28,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28250892] [2020-07-19 23:17:28,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368180352] [2020-07-19 23:17:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a2b772 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:28,099 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a2b772 issued 3 check-sat command(s) [2020-07-19 23:17:28,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:17:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:28,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:28,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 23:17:28,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408177502] [2020-07-19 23:17:28,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:17:28,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:28,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:17:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:17:28,142 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-19 23:17:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:28,220 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-19 23:17:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:17:28,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-19 23:17:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:28,222 INFO L225 Difference]: With dead ends: 31 [2020-07-19 23:17:28,223 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 23:17:28,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:17:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 23:17:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 23:17:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:17:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 23:17:28,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-19 23:17:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:28,231 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 23:17:28,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:17:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 23:17:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 23:17:28,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:28,233 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:28,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:28,446 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:28,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-19 23:17:28,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:28,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130003209] [2020-07-19 23:17:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:28,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130003209] [2020-07-19 23:17:28,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055005527] [2020-07-19 23:17:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db41bfd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:28,635 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db41bfd issued 3 check-sat command(s) [2020-07-19 23:17:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:17:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:28,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:28,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-19 23:17:28,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846624026] [2020-07-19 23:17:28,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:17:28,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:17:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:28,690 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-19 23:17:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:28,776 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-19 23:17:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:17:28,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-19 23:17:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:28,779 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:17:28,779 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:17:28,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:17:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:17:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 23:17:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:17:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-19 23:17:28,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-19 23:17:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:28,787 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-19 23:17:28,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:17:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-19 23:17:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 23:17:28,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:28,789 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:28,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:28,990 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-19 23:17:28,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:28,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660443397] [2020-07-19 23:17:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:29,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660443397] [2020-07-19 23:17:29,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931057607] [2020-07-19 23:17:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5051fa65 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:29,234 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5051fa65 issued 3 check-sat command(s) [2020-07-19 23:17:29,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:29,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:17:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:29,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:29,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-19 23:17:29,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297675845] [2020-07-19 23:17:29,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:17:29,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:17:29,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:17:29,304 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-19 23:17:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:29,434 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-19 23:17:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:17:29,435 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-19 23:17:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:29,436 INFO L225 Difference]: With dead ends: 37 [2020-07-19 23:17:29,436 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 23:17:29,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:17:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 23:17:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 23:17:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:17:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 23:17:29,443 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-19 23:17:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:29,444 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 23:17:29,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:17:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 23:17:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 23:17:29,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:29,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:29,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:17:29,647 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:29,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-19 23:17:29,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:29,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799744017] [2020-07-19 23:17:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:29,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799744017] [2020-07-19 23:17:29,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906413101] [2020-07-19 23:17:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@403571d8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:29,861 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@403571d8 issued 3 check-sat command(s) [2020-07-19 23:17:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:29,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:17:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:29,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:29,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-19 23:17:29,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294292973] [2020-07-19 23:17:29,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:17:29,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:29,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:17:29,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:17:29,950 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-19 23:17:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:30,075 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-19 23:17:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:17:30,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-19 23:17:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:30,078 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:17:30,078 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:17:30,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:17:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:17:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 23:17:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 23:17:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 23:17:30,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-19 23:17:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:30,094 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 23:17:30,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:17:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 23:17:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 23:17:30,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:30,101 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:30,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:30,317 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-19 23:17:30,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:30,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525609080] [2020-07-19 23:17:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:30,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525609080] [2020-07-19 23:17:30,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152490170] [2020-07-19 23:17:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e4792f9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:30,583 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e4792f9 issued 3 check-sat command(s) [2020-07-19 23:17:30,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:17:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:30,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:30,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-19 23:17:30,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268304382] [2020-07-19 23:17:30,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:17:30,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:17:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:17:30,632 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-19 23:17:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:30,745 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-19 23:17:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:17:30,745 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-19 23:17:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:30,747 INFO L225 Difference]: With dead ends: 43 [2020-07-19 23:17:30,747 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:17:30,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:17:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:17:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 23:17:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 23:17:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 23:17:30,755 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-19 23:17:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:30,755 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 23:17:30,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:17:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 23:17:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 23:17:30,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:30,757 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:30,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:30,971 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:30,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:30,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-19 23:17:30,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:30,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251179] [2020-07-19 23:17:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:31,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251179] [2020-07-19 23:17:31,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730271652] [2020-07-19 23:17:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13df3b55 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:31,236 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13df3b55 issued 3 check-sat command(s) [2020-07-19 23:17:31,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:17:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:31,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:31,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-19 23:17:31,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648418800] [2020-07-19 23:17:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:17:31,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:31,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:17:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:17:31,312 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-19 23:17:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:31,455 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-19 23:17:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:17:31,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-19 23:17:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:31,458 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:17:31,458 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:17:31,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:17:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:17:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 23:17:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:17:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-19 23:17:31,473 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-19 23:17:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:31,474 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-19 23:17:31,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:17:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-19 23:17:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 23:17:31,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:31,479 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:31,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:17:31,692 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:31,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-19 23:17:31,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:31,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919308381] [2020-07-19 23:17:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:31,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919308381] [2020-07-19 23:17:31,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186327948] [2020-07-19 23:17:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ffa79ce No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:31,987 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ffa79ce issued 3 check-sat command(s) [2020-07-19 23:17:31,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:17:31,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:32,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:32,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-19 23:17:32,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800714489] [2020-07-19 23:17:32,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:17:32,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:32,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:17:32,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:17:32,039 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-19 23:17:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:32,212 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-19 23:17:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:17:32,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-19 23:17:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:32,218 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:17:32,219 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 23:17:32,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:17:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 23:17:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 23:17:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:17:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 23:17:32,235 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-19 23:17:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:32,235 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 23:17:32,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:17:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 23:17:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 23:17:32,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:32,246 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:32,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:32,447 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-19 23:17:32,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:32,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018456970] [2020-07-19 23:17:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:32,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018456970] [2020-07-19 23:17:32,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994068583] [2020-07-19 23:17:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bce6a2e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:32,877 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bce6a2e issued 3 check-sat command(s) [2020-07-19 23:17:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:17:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:32,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:32,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-19 23:17:32,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450586855] [2020-07-19 23:17:32,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:17:32,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:17:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:17:32,964 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-19 23:17:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:33,123 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-19 23:17:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:17:33,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-19 23:17:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:33,125 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:17:33,125 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:17:33,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:17:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:17:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 23:17:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:17:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-19 23:17:33,132 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-19 23:17:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:33,133 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-19 23:17:33,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:17:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-19 23:17:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 23:17:33,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:33,135 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:33,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:33,348 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-19 23:17:33,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:33,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107178499] [2020-07-19 23:17:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:33,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107178499] [2020-07-19 23:17:33,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794982207] [2020-07-19 23:17:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e1a10ec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:33,839 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e1a10ec issued 3 check-sat command(s) [2020-07-19 23:17:33,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:33,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:17:33,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:33,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:33,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-19 23:17:33,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72791882] [2020-07-19 23:17:33,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:17:33,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:17:33,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:17:33,912 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-19 23:17:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:34,089 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-19 23:17:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:17:34,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-19 23:17:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:34,091 INFO L225 Difference]: With dead ends: 55 [2020-07-19 23:17:34,091 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 23:17:34,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:17:34,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 23:17:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 23:17:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:17:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 23:17:34,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-19 23:17:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:34,099 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 23:17:34,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:17:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 23:17:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 23:17:34,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:34,100 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:34,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 23:17:34,314 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:34,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-19 23:17:34,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:34,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288201525] [2020-07-19 23:17:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:34,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288201525] [2020-07-19 23:17:34,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84325501] [2020-07-19 23:17:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@330dec1b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:34,819 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@330dec1b issued 3 check-sat command(s) [2020-07-19 23:17:34,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:17:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:34,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:34,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-19 23:17:34,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178542021] [2020-07-19 23:17:34,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:17:34,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:17:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:17:34,910 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-19 23:17:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:35,113 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-19 23:17:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:17:35,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-19 23:17:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:35,115 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:17:35,115 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:17:35,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:17:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:17:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-19 23:17:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 23:17:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-19 23:17:35,132 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-19 23:17:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:35,132 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-19 23:17:35,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:17:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-19 23:17:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 23:17:35,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:35,134 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:35,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:17:35,337 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-19 23:17:35,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:35,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279680198] [2020-07-19 23:17:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:35,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279680198] [2020-07-19 23:17:35,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469101459] [2020-07-19 23:17:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e5b5dd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:35,871 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e5b5dd issued 3 check-sat command(s) [2020-07-19 23:17:35,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:17:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:35,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:35,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-19 23:17:35,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292445310] [2020-07-19 23:17:35,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:17:35,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:17:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:17:35,958 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-19 23:17:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:36,160 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-19 23:17:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:17:36,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-19 23:17:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:36,162 INFO L225 Difference]: With dead ends: 61 [2020-07-19 23:17:36,162 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 23:17:36,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:17:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 23:17:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 23:17:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:17:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 23:17:36,177 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-19 23:17:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:36,177 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 23:17:36,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:17:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 23:17:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 23:17:36,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:36,180 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:36,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:17:36,395 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-19 23:17:36,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:36,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75186680] [2020-07-19 23:17:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:17:37,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75186680] [2020-07-19 23:17:37,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258566543] [2020-07-19 23:17:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c33593c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:37,074 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c33593c issued 3 check-sat command(s) [2020-07-19 23:17:37,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:17:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:17:37,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:37,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-19 23:17:37,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891116147] [2020-07-19 23:17:37,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:17:37,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:17:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:17:37,143 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-19 23:17:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:37,371 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-19 23:17:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:17:37,372 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-19 23:17:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:37,373 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:17:37,373 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:17:37,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:17:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:17:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-19 23:17:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 23:17:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-19 23:17:37,380 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-19 23:17:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:37,381 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-19 23:17:37,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:17:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-19 23:17:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-19 23:17:37,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:37,383 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:37,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:37,598 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-19 23:17:37,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:37,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391897027] [2020-07-19 23:17:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 23:17:38,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391897027] [2020-07-19 23:17:38,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506249319] [2020-07-19 23:17:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fb3c4a0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:38,221 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fb3c4a0 issued 3 check-sat command(s) [2020-07-19 23:17:38,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:38,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 23:17:38,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 23:17:38,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:38,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-07-19 23:17:38,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359914393] [2020-07-19 23:17:38,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:17:38,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:17:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:17:38,314 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-07-19 23:17:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:38,606 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-19 23:17:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:17:38,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-07-19 23:17:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:38,608 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:17:38,608 INFO L226 Difference]: Without dead ends: 63 [2020-07-19 23:17:38,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:17:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-19 23:17:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-19 23:17:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 23:17:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-19 23:17:38,618 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-19 23:17:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:38,619 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-19 23:17:38,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:17:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-19 23:17:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 23:17:38,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:38,628 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:38,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 23:17:38,844 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-19 23:17:38,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:38,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53579565] [2020-07-19 23:17:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 23:17:39,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53579565] [2020-07-19 23:17:39,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753748933] [2020-07-19 23:17:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@240aa7be No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:39,559 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@240aa7be issued 3 check-sat command(s) [2020-07-19 23:17:39,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:39,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 23:17:39,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 23:17:39,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:39,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-19 23:17:39,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729220480] [2020-07-19 23:17:39,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 23:17:39,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 23:17:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:17:39,649 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-07-19 23:17:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:39,924 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-19 23:17:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:17:39,925 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-07-19 23:17:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:39,927 INFO L225 Difference]: With dead ends: 70 [2020-07-19 23:17:39,927 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:17:39,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 23:17:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:17:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-19 23:17:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 23:17:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-19 23:17:39,938 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-19 23:17:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:39,938 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-19 23:17:39,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 23:17:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-19 23:17:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-19 23:17:39,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:39,942 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:40,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 23:17:40,142 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-07-19 23:17:40,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:40,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915447450] [2020-07-19 23:17:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 23:17:40,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915447450] [2020-07-19 23:17:40,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905129270] [2020-07-19 23:17:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e3096cb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:40,914 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e3096cb issued 3 check-sat command(s) [2020-07-19 23:17:40,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 23:17:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 23:17:40,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:40,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-07-19 23:17:40,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224887291] [2020-07-19 23:17:40,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:17:40,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:17:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:17:40,994 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-07-19 23:17:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:41,264 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-19 23:17:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:17:41,265 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 115 [2020-07-19 23:17:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:41,266 INFO L225 Difference]: With dead ends: 73 [2020-07-19 23:17:41,266 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 23:17:41,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 23:17:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 23:17:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-19 23:17:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 23:17:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-19 23:17:41,272 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-19 23:17:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:41,273 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-19 23:17:41,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:17:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-19 23:17:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-19 23:17:41,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:41,274 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:41,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 23:17:41,475 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-07-19 23:17:41,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:41,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237002729] [2020-07-19 23:17:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 23:17:42,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237002729] [2020-07-19 23:17:42,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327802590] [2020-07-19 23:17:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@482f0545 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:42,580 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@482f0545 issued 3 check-sat command(s) [2020-07-19 23:17:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 23:17:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 23:17:42,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:42,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-07-19 23:17:42,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064677829] [2020-07-19 23:17:42,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:17:42,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:17:42,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:17:42,710 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-07-19 23:17:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:43,093 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-19 23:17:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:17:43,094 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-07-19 23:17:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:43,095 INFO L225 Difference]: With dead ends: 76 [2020-07-19 23:17:43,095 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 23:17:43,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 23:17:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 23:17:43,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-19 23:17:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 23:17:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-19 23:17:43,102 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-19 23:17:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:43,102 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-19 23:17:43,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:17:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-19 23:17:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-19 23:17:43,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:43,105 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:43,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:43,319 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-07-19 23:17:43,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:43,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913668870] [2020-07-19 23:17:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 23:17:44,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913668870] [2020-07-19 23:17:44,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121686979] [2020-07-19 23:17:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@692d0329 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:44,378 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@692d0329 issued 3 check-sat command(s) [2020-07-19 23:17:44,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 23:17:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 23:17:44,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:44,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-07-19 23:17:44,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200630455] [2020-07-19 23:17:44,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 23:17:44,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 23:17:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:17:44,453 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-07-19 23:17:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:44,810 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-19 23:17:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 23:17:44,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-07-19 23:17:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:44,813 INFO L225 Difference]: With dead ends: 79 [2020-07-19 23:17:44,813 INFO L226 Difference]: Without dead ends: 75 [2020-07-19 23:17:44,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 23:17:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-19 23:17:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-19 23:17:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 23:17:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-19 23:17:44,824 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-19 23:17:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:44,825 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-19 23:17:44,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 23:17:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-19 23:17:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-19 23:17:44,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:44,827 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:45,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:45,043 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-07-19 23:17:45,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:45,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496636474] [2020-07-19 23:17:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-19 23:17:45,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496636474] [2020-07-19 23:17:45,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60361904] [2020-07-19 23:17:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3aa949c0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:46,079 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3aa949c0 issued 3 check-sat command(s) [2020-07-19 23:17:46,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:46,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 23:17:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-19 23:17:46,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:46,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-07-19 23:17:46,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505214723] [2020-07-19 23:17:46,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 23:17:46,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 23:17:46,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:17:46,179 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 27 states. [2020-07-19 23:17:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:46,539 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-19 23:17:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:17:46,546 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 133 [2020-07-19 23:17:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:46,547 INFO L225 Difference]: With dead ends: 82 [2020-07-19 23:17:46,547 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 23:17:46,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 23:17:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 23:17:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-19 23:17:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-19 23:17:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-19 23:17:46,557 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-19 23:17:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:46,559 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-19 23:17:46,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 23:17:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-19 23:17:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-19 23:17:46,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:46,561 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:46,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 23:17:46,775 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:46,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-07-19 23:17:46,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:46,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433189668] [2020-07-19 23:17:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-19 23:17:47,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433189668] [2020-07-19 23:17:47,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926361781] [2020-07-19 23:17:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@612a3ca0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:47,950 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@612a3ca0 issued 3 check-sat command(s) [2020-07-19 23:17:47,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:47,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-19 23:17:47,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-19 23:17:48,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:48,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-07-19 23:17:48,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766875693] [2020-07-19 23:17:48,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 23:17:48,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 23:17:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:17:48,047 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 28 states. [2020-07-19 23:17:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:48,414 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-07-19 23:17:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:17:48,418 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 139 [2020-07-19 23:17:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:48,419 INFO L225 Difference]: With dead ends: 85 [2020-07-19 23:17:48,419 INFO L226 Difference]: Without dead ends: 81 [2020-07-19 23:17:48,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2020-07-19 23:17:48,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-19 23:17:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-19 23:17:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 23:17:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-19 23:17:48,427 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-07-19 23:17:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:48,427 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-19 23:17:48,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 23:17:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-19 23:17:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-19 23:17:48,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:48,429 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:48,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 23:17:48,643 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:48,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-07-19 23:17:48,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:48,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739103687] [2020-07-19 23:17:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-19 23:17:49,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739103687] [2020-07-19 23:17:49,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840598112] [2020-07-19 23:17:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39af3ae9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:49,725 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39af3ae9 issued 3 check-sat command(s) [2020-07-19 23:17:49,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:49,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-19 23:17:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-19 23:17:49,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:49,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-07-19 23:17:49,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588724158] [2020-07-19 23:17:49,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 23:17:49,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:49,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 23:17:49,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:17:49,843 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 29 states. [2020-07-19 23:17:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:50,253 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-07-19 23:17:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 23:17:50,254 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 145 [2020-07-19 23:17:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:50,255 INFO L225 Difference]: With dead ends: 88 [2020-07-19 23:17:50,267 INFO L226 Difference]: Without dead ends: 84 [2020-07-19 23:17:50,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2020-07-19 23:17:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-19 23:17:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-19 23:17:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-19 23:17:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-19 23:17:50,275 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-07-19 23:17:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:50,276 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-19 23:17:50,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 23:17:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-19 23:17:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-19 23:17:50,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:50,278 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:50,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,491 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-07-19 23:17:50,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:50,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186543016] [2020-07-19 23:17:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-19 23:17:51,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186543016] [2020-07-19 23:17:51,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883895817] [2020-07-19 23:17:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e48cff1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:51,698 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e48cff1 issued 3 check-sat command(s) [2020-07-19 23:17:51,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-19 23:17:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-19 23:17:51,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:51,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-07-19 23:17:51,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907041443] [2020-07-19 23:17:51,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 23:17:51,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:51,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 23:17:51,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:17:51,796 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 30 states. [2020-07-19 23:17:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:52,188 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-19 23:17:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 23:17:52,189 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2020-07-19 23:17:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:52,190 INFO L225 Difference]: With dead ends: 91 [2020-07-19 23:17:52,190 INFO L226 Difference]: Without dead ends: 87 [2020-07-19 23:17:52,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 23:17:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-19 23:17:52,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-19 23:17:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 23:17:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-19 23:17:52,196 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-07-19 23:17:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:52,197 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-19 23:17:52,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 23:17:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-19 23:17:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-19 23:17:52,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:52,198 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:52,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 23:17:52,412 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-07-19 23:17:52,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:52,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954435950] [2020-07-19 23:17:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-19 23:17:53,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954435950] [2020-07-19 23:17:53,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726445478] [2020-07-19 23:17:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52f13faf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,596 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52f13faf issued 3 check-sat command(s) [2020-07-19 23:17:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-19 23:17:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-19 23:17:53,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:53,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-07-19 23:17:53,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679994452] [2020-07-19 23:17:53,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 23:17:53,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:53,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 23:17:53,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:17:53,720 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 31 states. [2020-07-19 23:17:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:54,145 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-07-19 23:17:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 23:17:54,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 157 [2020-07-19 23:17:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:54,147 INFO L225 Difference]: With dead ends: 94 [2020-07-19 23:17:54,147 INFO L226 Difference]: Without dead ends: 90 [2020-07-19 23:17:54,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2020-07-19 23:17:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-19 23:17:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-19 23:17:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-19 23:17:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-19 23:17:54,160 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-07-19 23:17:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:54,161 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-19 23:17:54,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 23:17:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-19 23:17:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-19 23:17:54,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:54,162 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:54,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:54,376 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:54,377 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-07-19 23:17:54,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:54,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426577139] [2020-07-19 23:17:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-07-19 23:17:57,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426577139] [2020-07-19 23:17:57,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721290059] [2020-07-19 23:17:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa2b5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:57,611 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa2b5 issued 4 check-sat command(s) [2020-07-19 23:17:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 107 conjunts are in the unsatisfiable core [2020-07-19 23:17:57,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-07-19 23:17:57,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:57,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2020-07-19 23:17:57,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059310832] [2020-07-19 23:17:57,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-19 23:17:57,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:57,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-19 23:17:57,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 23:17:57,912 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-07-19 23:17:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:59,280 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-07-19 23:17:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-19 23:17:59,280 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-07-19 23:17:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:59,282 INFO L225 Difference]: With dead ends: 97 [2020-07-19 23:17:59,282 INFO L226 Difference]: Without dead ends: 93 [2020-07-19 23:17:59,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 214 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 23:17:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-19 23:17:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-19 23:17:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-19 23:17:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-07-19 23:17:59,289 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-07-19 23:17:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:59,289 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-07-19 23:17:59,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-19 23:17:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-07-19 23:17:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-19 23:17:59,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:59,291 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:59,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-19 23:17:59,505 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-07-19 23:17:59,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:59,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594900205] [2020-07-19 23:17:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24df1ff0 [2020-07-19 23:17:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-07-19 23:18:00,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594900205] [2020-07-19 23:18:00,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436699296] [2020-07-19 23:18:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e1e956d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:00,973 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e1e956d issued 3 check-sat command(s) [2020-07-19 23:18:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-19 23:18:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-07-19 23:18:01,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:18:01,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2020-07-19 23:18:01,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464677] [2020-07-19 23:18:01,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 23:18:01,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:01,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 23:18:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:18:01,120 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2020-07-19 23:18:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:01,919 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-07-19 23:18:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 23:18:01,919 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-07-19 23:18:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:01,920 INFO L225 Difference]: With dead ends: 93 [2020-07-19 23:18:01,920 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:18:01,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 23:18:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:18:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:18:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:18:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:18:01,923 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2020-07-19 23:18:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:01,924 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:18:01,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 23:18:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:18:01,924 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:18:02,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-19 23:18:02,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:18:02,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 23:18:02,173 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:18:02,173 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:18:02,173 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:18:02,173 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:18:02,173 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:18:02,174 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-19 23:18:02,175 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-19 23:18:02,175 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-19 23:18:02,175 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-19 23:18:02,175 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-19 23:18:02,175 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 25 main_~input~0) (<= main_~input~0 25)) [2020-07-19 23:18:02,175 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-19 23:18:02,175 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-19 23:18:02,176 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-19 23:18:02,176 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-19 23:18:02,176 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-19 23:18:02,176 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-19 23:18:02,176 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 23:18:02,176 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-19 23:18:02,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:18:02 BoogieIcfgContainer [2020-07-19 23:18:02,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:18:02,188 INFO L168 Benchmark]: Toolchain (without parser) took 36803.43 ms. Allocated memory was 145.2 MB in the beginning and 709.9 MB in the end (delta: 564.7 MB). Free memory was 102.8 MB in the beginning and 500.7 MB in the end (delta: -397.9 MB). Peak memory consumption was 166.7 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:02,188 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.2 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-19 23:18:02,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.77 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:02,189 INFO L168 Benchmark]: Boogie Preprocessor took 25.59 ms. Allocated memory is still 145.2 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:02,191 INFO L168 Benchmark]: RCFGBuilder took 335.70 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 91.1 MB in the beginning and 169.5 MB in the end (delta: -78.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:02,191 INFO L168 Benchmark]: TraceAbstraction took 36103.41 ms. Allocated memory was 201.3 MB in the beginning and 709.9 MB in the end (delta: 508.6 MB). Free memory was 169.5 MB in the beginning and 500.7 MB in the end (delta: -331.2 MB). Peak memory consumption was 177.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:02,193 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.2 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.77 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.59 ms. Allocated memory is still 145.2 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 335.70 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 91.1 MB in the beginning and 169.5 MB in the end (delta: -78.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36103.41 ms. Allocated memory was 201.3 MB in the beginning and 709.9 MB in the end (delta: 508.6 MB). Free memory was 169.5 MB in the beginning and 500.7 MB in the end (delta: -331.2 MB). Peak memory consumption was 177.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 35.9s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 1328 SDslu, 4759 SDs, 0 SdLazy, 3221 SolverSat, 352 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4065 GetRequests, 3202 SyntacticMatches, 4 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 4901 NumberOfCodeBlocks, 4369 NumberOfCodeBlocksAsserted, 106 NumberOfCheckSat, 4848 ConstructedInterpolants, 0 QuantifiedInterpolants, 1491024 SizeOfPredicates, 377 NumberOfNonLiveVariables, 4928 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 20956/37908 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...