/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:54:56,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:54:56,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:54:56,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:54:57,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:54:57,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:54:57,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:54:57,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:54:57,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:54:57,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:54:57,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:54:57,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:54:57,109 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:54:57,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:54:57,110 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:54:57,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:54:57,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:54:57,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:54:57,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:54:57,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:54:57,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:54:57,112 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:54:57,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:54:57,112 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:54:57,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:54:57,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:54:57,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:54:57,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:54:57,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:54:57,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:54:57,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:54:57,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:54:57,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:54:57,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:54:57,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:54:57,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:54:57,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:54:57,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:54:57,590 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:54:57,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:54:57,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:54:57,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:54:57,627 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:54:57,628 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 03:54:57,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905c8a812/65aedda1a8aa47f79505b085016ca8b9/FLAG3d9ee4def [2020-07-20 03:54:58,657 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:54:58,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 03:54:58,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905c8a812/65aedda1a8aa47f79505b085016ca8b9/FLAG3d9ee4def [2020-07-20 03:54:58,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905c8a812/65aedda1a8aa47f79505b085016ca8b9 [2020-07-20 03:54:58,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:54:58,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:54:58,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:54:58,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:54:58,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:54:58,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:54:58" (1/1) ... [2020-07-20 03:54:58,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6202bf4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:58, skipping insertion in model container [2020-07-20 03:54:58,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:54:58" (1/1) ... [2020-07-20 03:54:58,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:54:58,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:54:59,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:54:59,340 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:54:59,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:54:59,430 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:54:59,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59 WrapperNode [2020-07-20 03:54:59,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:54:59,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:54:59,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:54:59,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:54:59,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:54:59,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:54:59,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:54:59,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:54:59,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:54:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:54:59,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:54:59,742 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 03:54:59,742 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 03:54:59,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:54:59,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:54:59,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:54:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 03:54:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:54:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 03:54:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:54:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:54:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:54:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:54:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:54:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:55:00,279 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:55:00,280 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 03:55:00,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:55:00 BoogieIcfgContainer [2020-07-20 03:55:00,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:55:00,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:55:00,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:55:00,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:55:00,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:54:58" (1/3) ... [2020-07-20 03:55:00,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb085a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:00, skipping insertion in model container [2020-07-20 03:55:00,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (2/3) ... [2020-07-20 03:55:00,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb085a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:00, skipping insertion in model container [2020-07-20 03:55:00,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:55:00" (3/3) ... [2020-07-20 03:55:00,303 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-20 03:55:00,327 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:55:00,345 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:55:00,376 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:55:00,407 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:55:00,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:55:00,408 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:55:00,408 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:55:00,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:55:00,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:55:00,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:55:00,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:55:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-20 03:55:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 03:55:00,443 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:00,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:00,448 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-20 03:55:00,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:00,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687837135] [2020-07-20 03:55:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687837135] [2020-07-20 03:55:00,855 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-20 03:55:00,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484783589] [2020-07-20 03:55:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28cbef5f 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 03:55:01,012 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28cbef5f issued 1 check-sat command(s) [2020-07-20 03:55:01,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:01,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:55:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 03:55:01,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:01,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:55:01,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717001294] [2020-07-20 03:55:01,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:55:01,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:55:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:55:01,128 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-20 03:55:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:01,214 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 03:55:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:55:01,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-20 03:55:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:01,241 INFO L225 Difference]: With dead ends: 73 [2020-07-20 03:55:01,241 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:55:01,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:55:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:55:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 03:55:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:55:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-20 03:55:01,349 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-20 03:55:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:01,352 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-20 03:55:01,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:55:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-20 03:55:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 03:55:01,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:01,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:01,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 03:55:01,574 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-20 03:55:01,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:01,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112076993] [2020-07-20 03:55:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:55:01,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112076993] [2020-07-20 03:55:01,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:01,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 03:55:01,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119714918] [2020-07-20 03:55:01,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:55:01,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:55:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:01,855 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2020-07-20 03:55:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:02,485 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-20 03:55:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:55:02,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 03:55:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:02,490 INFO L225 Difference]: With dead ends: 65 [2020-07-20 03:55:02,491 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:55:02,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:55:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:55:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 03:55:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 03:55:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 03:55:02,512 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-20 03:55:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:02,513 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 03:55:02,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:55:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 03:55:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:55:02,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:02,517 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:02,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:55:02,518 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:02,520 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-20 03:55:02,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:02,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478556591] [2020-07-20 03:55:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:55:02,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478556591] [2020-07-20 03:55:02,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697993494] [2020-07-20 03:55:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c945138 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 03:55:02,878 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c945138 issued 2 check-sat command(s) [2020-07-20 03:55:02,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:55:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:55:02,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:02,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2020-07-20 03:55:02,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366678481] [2020-07-20 03:55:02,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:55:02,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:55:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:55:02,961 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-07-20 03:55:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:03,057 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-07-20 03:55:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:55:03,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-07-20 03:55:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:03,060 INFO L225 Difference]: With dead ends: 57 [2020-07-20 03:55:03,061 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 03:55:03,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:55:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 03:55:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 03:55:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:55:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 03:55:03,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 40 [2020-07-20 03:55:03,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:03,076 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 03:55:03,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:55:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 03:55:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 03:55:03,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:03,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:03,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:03,296 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1437163047, now seen corresponding path program 1 times [2020-07-20 03:55:03,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:03,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563541997] [2020-07-20 03:55:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 03:55:03,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563541997] [2020-07-20 03:55:03,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571994427] [2020-07-20 03:55:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33aac3ea No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:03,643 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33aac3ea issued 3 check-sat command(s) [2020-07-20 03:55:03,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:03,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:55:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 03:55:03,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:03,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-20 03:55:03,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926719842] [2020-07-20 03:55:03,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:55:03,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:55:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:55:03,725 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 10 states. [2020-07-20 03:55:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:04,377 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-07-20 03:55:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:55:04,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-07-20 03:55:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:04,387 INFO L225 Difference]: With dead ends: 69 [2020-07-20 03:55:04,388 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:55:04,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:55:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:55:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 03:55:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 03:55:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 03:55:04,433 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2020-07-20 03:55:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:04,437 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 03:55:04,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:55:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 03:55:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 03:55:04,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:04,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:04,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:04,661 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:04,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:04,662 INFO L82 PathProgramCache]: Analyzing trace with hash 545653175, now seen corresponding path program 2 times [2020-07-20 03:55:04,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:04,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074692629] [2020-07-20 03:55:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 03:55:04,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074692629] [2020-07-20 03:55:04,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455271720] [2020-07-20 03:55:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26779ee1 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 03:55:05,004 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26779ee1 issued 3 check-sat command(s) [2020-07-20 03:55:05,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:55:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 03:55:05,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:05,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2020-07-20 03:55:05,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848472757] [2020-07-20 03:55:05,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:55:05,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:55:05,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:55:05,077 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2020-07-20 03:55:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:05,173 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-07-20 03:55:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:55:05,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-07-20 03:55:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:05,177 INFO L225 Difference]: With dead ends: 67 [2020-07-20 03:55:05,178 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 03:55:05,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:55:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 03:55:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 03:55:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 03:55:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-20 03:55:05,190 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 44 [2020-07-20 03:55:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:05,191 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-20 03:55:05,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:55:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-20 03:55:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 03:55:05,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:05,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:05,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:05,410 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2870664, now seen corresponding path program 1 times [2020-07-20 03:55:05,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:05,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094698918] [2020-07-20 03:55:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 03:55:05,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094698918] [2020-07-20 03:55:05,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520719618] [2020-07-20 03:55:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e46b294 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:05,683 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e46b294 issued 3 check-sat command(s) [2020-07-20 03:55:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:05,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:55:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 03:55:05,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:05,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-20 03:55:05,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277261521] [2020-07-20 03:55:05,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:55:05,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:55:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:55:05,775 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 10 states. [2020-07-20 03:55:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:06,318 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-07-20 03:55:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:55:06,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-20 03:55:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:06,321 INFO L225 Difference]: With dead ends: 72 [2020-07-20 03:55:06,322 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 03:55:06,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:55:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 03:55:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 03:55:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 03:55:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 03:55:06,337 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 53 [2020-07-20 03:55:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:06,338 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 03:55:06,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:55:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 03:55:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 03:55:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:06,340 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:06,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:55:06,555 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 2 times [2020-07-20 03:55:06,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:06,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137196361] [2020-07-20 03:55:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 03:55:07,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137196361] [2020-07-20 03:55:07,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:07,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-20 03:55:07,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797583872] [2020-07-20 03:55:07,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:55:07,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:55:07,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:55:07,012 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 11 states. [2020-07-20 03:55:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:07,477 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-20 03:55:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:55:07,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-07-20 03:55:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:07,486 INFO L225 Difference]: With dead ends: 74 [2020-07-20 03:55:07,486 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 03:55:07,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:55:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 03:55:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-20 03:55:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 03:55:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-20 03:55:07,510 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-20 03:55:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:07,514 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-20 03:55:07,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:55:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-20 03:55:07,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 03:55:07,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:07,517 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:07,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 03:55:07,518 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-20 03:55:07,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:07,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107078905] [2020-07-20 03:55:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:07,548 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:07,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225564814] [2020-07-20 03:55:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40c66efa No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:07,696 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40c66efa issued 4 check-sat command(s) [2020-07-20 03:55:07,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:07,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:55:07,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 03:55:07,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107078905] [2020-07-20 03:55:07,826 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:07,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225564814] [2020-07-20 03:55:07,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:07,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 03:55:07,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121080603] [2020-07-20 03:55:07,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:55:07,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:55:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:55:07,837 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 9 states. [2020-07-20 03:55:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:08,015 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2020-07-20 03:55:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:55:08,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-07-20 03:55:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:08,021 INFO L225 Difference]: With dead ends: 120 [2020-07-20 03:55:08,021 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 03:55:08,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:55:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 03:55:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-07-20 03:55:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 03:55:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-20 03:55:08,040 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 65 [2020-07-20 03:55:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:08,040 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-20 03:55:08,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:55:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-20 03:55:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 03:55:08,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:08,043 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:08,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:08,258 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:08,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-20 03:55:08,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:08,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445590959] [2020-07-20 03:55:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:08,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445590959] [2020-07-20 03:55:08,477 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-20 03:55:08,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595455344] [2020-07-20 03:55:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@220a4d71 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 [2020-07-20 03:55:09,198 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@220a4d71 issued 3 check-sat command(s) [2020-07-20 03:55:09,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:09,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:55:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 03:55:09,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:09,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 03:55:09,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669751587] [2020-07-20 03:55:09,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:55:09,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:55:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:55:09,308 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-07-20 03:55:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:09,526 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-07-20 03:55:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:55:09,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-07-20 03:55:09,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:09,528 INFO L225 Difference]: With dead ends: 99 [2020-07-20 03:55:09,529 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 03:55:09,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:55:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 03:55:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-07-20 03:55:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 03:55:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-07-20 03:55:09,548 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2020-07-20 03:55:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:09,548 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-07-20 03:55:09,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:55:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-07-20 03:55:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 03:55:09,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:09,552 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:09,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:09,766 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-20 03:55:09,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:09,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890175309] [2020-07-20 03:55:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:09,784 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:09,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980422730] [2020-07-20 03:55:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37c97111 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:10,071 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37c97111 issued 3 check-sat command(s) [2020-07-20 03:55:10,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:10,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 03:55:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-20 03:55:10,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890175309] [2020-07-20 03:55:10,151 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:10,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980422730] [2020-07-20 03:55:10,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:10,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 03:55:10,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853410302] [2020-07-20 03:55:10,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:55:10,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:10,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:55:10,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:55:10,154 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 8 states. [2020-07-20 03:55:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:10,310 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-07-20 03:55:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:55:10,311 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-07-20 03:55:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:10,313 INFO L225 Difference]: With dead ends: 94 [2020-07-20 03:55:10,313 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:55:10,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:55:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:55:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-20 03:55:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 03:55:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-07-20 03:55:10,330 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 73 [2020-07-20 03:55:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:10,331 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-07-20 03:55:10,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:55:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-07-20 03:55:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 03:55:10,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:10,333 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:10,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:55:10,541 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-20 03:55:10,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:10,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400644791] [2020-07-20 03:55:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0112f [2020-07-20 03:55:10,575 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:10,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604330892] [2020-07-20 03:55:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7aeec08c 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 [2020-07-20 03:55:11,103 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7aeec08c issued 4 check-sat command(s) [2020-07-20 03:55:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 03:55:11,105 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:55:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:55:11,243 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:55:11,385 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:55:11,387 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:55:11,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:11,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:55:11 BoogieIcfgContainer [2020-07-20 03:55:11,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:55:11,731 INFO L168 Benchmark]: Toolchain (without parser) took 13005.95 ms. Allocated memory was 135.8 MB in the beginning and 291.0 MB in the end (delta: 155.2 MB). Free memory was 98.7 MB in the beginning and 128.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 125.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:11,732 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 135.8 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 03:55:11,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 704.08 ms. Allocated memory is still 135.8 MB. Free memory was 98.3 MB in the beginning and 87.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:11,734 INFO L168 Benchmark]: Boogie Preprocessor took 202.93 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 87.8 MB in the beginning and 178.1 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:11,734 INFO L168 Benchmark]: RCFGBuilder took 649.73 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 159.8 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:11,736 INFO L168 Benchmark]: TraceAbstraction took 11437.08 ms. Allocated memory was 200.8 MB in the beginning and 291.0 MB in the end (delta: 90.2 MB). Free memory was 159.1 MB in the beginning and 128.9 MB in the end (delta: 30.2 MB). Peak memory consumption was 120.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:11,740 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 135.8 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 704.08 ms. Allocated memory is still 135.8 MB. Free memory was 98.3 MB in the beginning and 87.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 202.93 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 87.8 MB in the beginning and 178.1 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 649.73 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 159.8 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11437.08 ms. Allocated memory was 200.8 MB in the beginning and 291.0 MB in the end (delta: 90.2 MB). Free memory was 159.1 MB in the beginning and 128.9 MB in the end (delta: 30.2 MB). Peak memory consumption was 120.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=5, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, x={2:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=-2147483648, temp=2, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, ret=-2147483648, temp=2, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=-2147483648, ret2=-2147483648, temp=1, x={2:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=1, ret=-2147483648, ret2=-2147483648, temp=1, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=1, temp=1, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=1, temp=1, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.2s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 296 SDtfs, 348 SDslu, 587 SDs, 0 SdLazy, 947 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 456 SyntacticMatches, 11 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=10, 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, 10 MinimizatonAttempts, 27 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 881 NumberOfCodeBlocks, 770 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 687 ConstructedInterpolants, 0 QuantifiedInterpolants, 73987 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1286 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 617/668 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...