/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 BIGGEST_EQUIVALENCE_CLASS --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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:07:00,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:07:00,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:07:00,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:07:00,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:07:00,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:07:00,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:07:00,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:07:00,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:07:00,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:07:00,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:07:00,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:07:00,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:07:00,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:07:00,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:07:00,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:07:00,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:07:00,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:07:00,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:07:00,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:07:00,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:07:00,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:07:00,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:07:00,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:07:00,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:07:00,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:07:00,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:07:00,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:07:00,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:07:00,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:07:00,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:07:00,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:07:00,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:07:00,094 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:07:00,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:07:00,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:07:00,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:07:00,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:07:00,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:07:00,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:07:00,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:07:00,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:07:00,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:07:00,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:07:00,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:07:00,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:07:00,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:07:00,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:07:00,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:07:00,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:07:00,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:07:00,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:07:00,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:07:00,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:07:00,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:07:00,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:07:00,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:07:00,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:07:00,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:07:00,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:07:00,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:07:00,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:07:00,434 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:07:00,434 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:07:00,435 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-07-20 06:07:00,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099eeee2e/d7a3d6b8ac094a48bc6c1b438175f51f/FLAGb996904fc [2020-07-20 06:07:01,030 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:07:01,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-07-20 06:07:01,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099eeee2e/d7a3d6b8ac094a48bc6c1b438175f51f/FLAGb996904fc [2020-07-20 06:07:01,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099eeee2e/d7a3d6b8ac094a48bc6c1b438175f51f [2020-07-20 06:07:01,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:07:01,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:07:01,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:07:01,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:07:01,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:07:01,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28086ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01, skipping insertion in model container [2020-07-20 06:07:01,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:07:01,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:07:01,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:07:01,580 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:07:01,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:07:01,611 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:07:01,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01 WrapperNode [2020-07-20 06:07:01,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:07:01,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:07:01,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:07:01,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:07:01,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... [2020-07-20 06:07:01,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:07:01,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:07:01,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:07:01,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:07:01,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:07:01,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:07:01,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:07:01,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:07:01,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:07:01,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:07:01,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:07:01,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:07:01,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:07:01,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:07:01,979 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:07:01,979 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 06:07:01,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:07:01 BoogieIcfgContainer [2020-07-20 06:07:01,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:07:01,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:07:01,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:07:01,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:07:01,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:07:01" (1/3) ... [2020-07-20 06:07:01,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4a094a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:07:01, skipping insertion in model container [2020-07-20 06:07:01,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:01" (2/3) ... [2020-07-20 06:07:01,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4a094a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:07:01, skipping insertion in model container [2020-07-20 06:07:01,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:07:01" (3/3) ... [2020-07-20 06:07:01,991 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-07-20 06:07:02,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:07:02,010 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:07:02,024 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:07:02,049 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:07:02,049 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:07:02,049 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:07:02,050 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:07:02,050 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:07:02,050 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:07:02,050 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:07:02,050 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:07:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 06:07:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 06:07:02,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:02,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:02,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-07-20 06:07:02,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:02,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133472292] [2020-07-20 06:07:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:02,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133472292] [2020-07-20 06:07:02,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:07:02,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 06:07:02,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63579176] [2020-07-20 06:07:02,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 06:07:02,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:02,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 06:07:02,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:07:02,218 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-20 06:07:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:02,242 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-20 06:07:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 06:07:02,244 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 06:07:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:02,252 INFO L225 Difference]: With dead ends: 30 [2020-07-20 06:07:02,253 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 06:07:02,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:07:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 06:07:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 06:07:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 06:07:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-20 06:07:02,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-20 06:07:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:02,298 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-20 06:07:02,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 06:07:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-20 06:07:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 06:07:02,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:02,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:02,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:07:02,300 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:02,300 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-07-20 06:07:02,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:02,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491387665] [2020-07-20 06:07:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491387665] [2020-07-20 06:07:02,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:07:02,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:07:02,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688259359] [2020-07-20 06:07:02,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:07:02,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:07:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:07:02,394 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-07-20 06:07:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:02,442 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-07-20 06:07:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:07:02,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 06:07:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:02,444 INFO L225 Difference]: With dead ends: 24 [2020-07-20 06:07:02,444 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 06:07:02,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:07:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 06:07:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-20 06:07:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:07:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 06:07:02,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 06:07:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:02,457 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 06:07:02,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:07:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 06:07:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 06:07:02,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:02,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:02,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:07:02,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-07-20 06:07:02,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:02,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84287468] [2020-07-20 06:07:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:02,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84287468] [2020-07-20 06:07:02,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458495778] [2020-07-20 06:07:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b8382f2 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 [2020-07-20 06:07:02,561 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b8382f2 issued 2 check-sat command(s) [2020-07-20 06:07:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:07:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:02,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:02,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-20 06:07:02,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749852913] [2020-07-20 06:07:02,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:07:02,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:02,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:07:02,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:07:02,601 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-07-20 06:07:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:02,658 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-07-20 06:07:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:07:02,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-20 06:07:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:02,660 INFO L225 Difference]: With dead ends: 27 [2020-07-20 06:07:02,660 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 06:07:02,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:07:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 06:07:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-07-20 06:07:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 06:07:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 06:07:02,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 06:07:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:02,667 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 06:07:02,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:07:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 06:07:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 06:07:02,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:02,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:02,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 06:07:02,873 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:02,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:02,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-07-20 06:07:02,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:02,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074334890] [2020-07-20 06:07:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:02,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074334890] [2020-07-20 06:07:02,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189064132] [2020-07-20 06:07:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65c6ee25 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:02,987 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65c6ee25 issued 2 check-sat command(s) [2020-07-20 06:07:02,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 06:07:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:02,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:02,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-20 06:07:02,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185579494] [2020-07-20 06:07:03,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:07:03,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:07:03,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:07:03,001 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-07-20 06:07:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:03,047 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-20 06:07:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:07:03,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 06:07:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:03,049 INFO L225 Difference]: With dead ends: 30 [2020-07-20 06:07:03,049 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 06:07:03,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:07:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 06:07:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-20 06:07:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 06:07:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 06:07:03,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-07-20 06:07:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:03,058 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 06:07:03,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:07:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 06:07:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 06:07:03,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:03,059 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:03,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:03,273 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:03,274 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 3 times [2020-07-20 06:07:03,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:03,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062193897] [2020-07-20 06:07:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 06:07:03,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062193897] [2020-07-20 06:07:03,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:07:03,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:07:03,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457062267] [2020-07-20 06:07:03,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:07:03,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:03,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:07:03,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:07:03,333 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-07-20 06:07:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:03,360 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-20 06:07:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:07:03,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-20 06:07:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:03,362 INFO L225 Difference]: With dead ends: 30 [2020-07-20 06:07:03,362 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 06:07:03,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:07:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 06:07:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-07-20 06:07:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 06:07:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-20 06:07:03,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-07-20 06:07:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:03,370 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-20 06:07:03,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:07:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-20 06:07:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 06:07:03,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:03,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:03,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 06:07:03,375 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2020-07-20 06:07:03,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:03,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197364858] [2020-07-20 06:07:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 06:07:03,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197364858] [2020-07-20 06:07:03,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299918616] [2020-07-20 06:07:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe3d2db No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:03,455 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe3d2db issued 2 check-sat command(s) [2020-07-20 06:07:03,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:07:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:03,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:03,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2020-07-20 06:07:03,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340969271] [2020-07-20 06:07:03,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:07:03,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:03,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:07:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:07:03,491 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-20 06:07:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:03,542 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-20 06:07:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:07:03,543 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-20 06:07:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:03,545 INFO L225 Difference]: With dead ends: 33 [2020-07-20 06:07:03,546 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 06:07:03,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:07:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 06:07:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 06:07:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 06:07:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-07-20 06:07:03,554 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-07-20 06:07:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:03,554 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-07-20 06:07:03,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:07:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-07-20 06:07:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 06:07:03,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:03,556 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:03,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:03,770 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 2 times [2020-07-20 06:07:03,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:03,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400545854] [2020-07-20 06:07:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 06:07:03,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400545854] [2020-07-20 06:07:03,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499880891] [2020-07-20 06:07:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d1f948e 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 [2020-07-20 06:07:03,897 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d1f948e issued 2 check-sat command(s) [2020-07-20 06:07:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:07:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:03,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:03,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 8 [2020-07-20 06:07:03,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283551716] [2020-07-20 06:07:03,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:07:03,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:07:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:07:03,930 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-07-20 06:07:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:03,985 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-20 06:07:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:07:03,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 06:07:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:03,987 INFO L225 Difference]: With dead ends: 36 [2020-07-20 06:07:03,987 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 06:07:03,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:07:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 06:07:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 06:07:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 06:07:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 06:07:03,993 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-20 06:07:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:03,994 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 06:07:03,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:07:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 06:07:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 06:07:03,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:03,995 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:04,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:04,209 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:04,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:04,210 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 3 times [2020-07-20 06:07:04,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:04,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187834036] [2020-07-20 06:07:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 06:07:04,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187834036] [2020-07-20 06:07:04,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266543875] [2020-07-20 06:07:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c8ce461 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-20 06:07:04,296 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c8ce461 issued 3 check-sat command(s) [2020-07-20 06:07:04,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 06:07:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:04,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:04,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2020-07-20 06:07:04,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956884729] [2020-07-20 06:07:04,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:07:04,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:04,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:07:04,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:07:04,328 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-07-20 06:07:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:04,393 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-20 06:07:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:07:04,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 06:07:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:04,394 INFO L225 Difference]: With dead ends: 39 [2020-07-20 06:07:04,394 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 06:07:04,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:07:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 06:07:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 06:07:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 06:07:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 06:07:04,400 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-07-20 06:07:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:04,401 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 06:07:04,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:07:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 06:07:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 06:07:04,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:04,402 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:04,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:04,616 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 4 times [2020-07-20 06:07:04,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:04,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798584105] [2020-07-20 06:07:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 06:07:04,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798584105] [2020-07-20 06:07:04,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771611746] [2020-07-20 06:07:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66f1a67f 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 [2020-07-20 06:07:04,757 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66f1a67f issued 3 check-sat command(s) [2020-07-20 06:07:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:07:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:04,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:04,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2020-07-20 06:07:04,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303976845] [2020-07-20 06:07:04,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:07:04,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:07:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:07:04,790 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-07-20 06:07:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:04,849 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-20 06:07:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:07:04,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-20 06:07:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:04,850 INFO L225 Difference]: With dead ends: 40 [2020-07-20 06:07:04,851 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 06:07:04,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:07:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 06:07:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 06:07:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 06:07:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-20 06:07:04,856 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-07-20 06:07:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:04,857 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-20 06:07:04,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:07:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-20 06:07:04,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 06:07:04,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:04,858 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:05,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:05,072 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 5 times [2020-07-20 06:07:05,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:05,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752009494] [2020-07-20 06:07:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70773c0a [2020-07-20 06:07:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:07:05,086 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:07:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:07:05,096 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:07:05,117 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 06:07:05,120 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 06:07:05,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 06:07:05,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:07:05 BoogieIcfgContainer [2020-07-20 06:07:05,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:07:05,148 INFO L168 Benchmark]: Toolchain (without parser) took 3769.82 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 101.7 MB in the beginning and 130.2 MB in the end (delta: -28.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-07-20 06:07:05,149 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 06:07:05,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.95 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 06:07:05,150 INFO L168 Benchmark]: Boogie Preprocessor took 116.30 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 182.1 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-20 06:07:05,151 INFO L168 Benchmark]: RCFGBuilder took 251.81 ms. Allocated memory is still 201.9 MB. Free memory was 181.2 MB in the beginning and 170.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:07:05,152 INFO L168 Benchmark]: TraceAbstraction took 3161.71 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 169.6 MB in the beginning and 130.2 MB in the end (delta: 39.4 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2020-07-20 06:07:05,156 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 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.95 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.30 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 182.1 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 251.81 ms. Allocated memory is still 201.9 MB. Free memory was 181.2 MB in the beginning and 170.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3161.71 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 169.6 MB in the beginning and 130.2 MB in the end (delta: 39.4 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 73 SDslu, 224 SDs, 0 SdLazy, 164 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 343 NumberOfCodeBlocks, 295 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 12906 SizeOfPredicates, 5 NumberOfNonLiveVariables, 206 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 140/380 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 incorrect! Received shutdown request...