/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/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:54:55,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:54:55,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:54:55,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:54:55,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:54:55,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:54:55,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:54:55,962 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 03:54:56,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:54:56,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:54:56,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:54:56,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:54:56,008 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:54:56,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:54:56,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:54:56,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:54:56,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:54:56,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:54:56,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:54:56,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:54:56,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:54:56,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:54:56,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:54:56,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:54:56,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:54:56,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:54:56,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:54:56,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:54:56,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:54:56,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:54:56,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:54:56,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:54:56,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:54:56,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:54:56,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:54:56,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:54:56,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:54:56,017 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 03:54:56,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:54:56,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:54:56,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:54:56,323 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:54:56,323 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:54:56,325 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 03:54:56,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/380ef4041/1beb09dd1bff49598b402ef3e7fdd6be/FLAG7045c62be [2020-07-20 03:54:56,879 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:54:56,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 03:54:56,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/380ef4041/1beb09dd1bff49598b402ef3e7fdd6be/FLAG7045c62be [2020-07-20 03:54:57,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/380ef4041/1beb09dd1bff49598b402ef3e7fdd6be [2020-07-20 03:54:57,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:54:57,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:54:57,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:54:57,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:54:57,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:54:57,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ac281b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57, skipping insertion in model container [2020-07-20 03:54:57,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:54:57,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:54:57,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:54:57,485 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:54:57,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:54:57,624 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:54:57,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57 WrapperNode [2020-07-20 03:54:57,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:54:57,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:54:57,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:54:57,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:54:57,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (1/1) ... [2020-07-20 03:54:57,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:54:57,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:54:57,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:54:57,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:54:57,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (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 03:54:57,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:54:57,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:54:57,728 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 03:54:57,728 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 03:54:57,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:54:57,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:54:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:54:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 03:54:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:54:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 03:54:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:54:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:54:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:54:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:54:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:54:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:54:58,192 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:54:58,193 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 03:54:58,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:54:58 BoogieIcfgContainer [2020-07-20 03:54:58,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:54:58,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:54:58,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:54:58,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:54:58,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:54:57" (1/3) ... [2020-07-20 03:54:58,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9c50e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:54:58, skipping insertion in model container [2020-07-20 03:54:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:57" (2/3) ... [2020-07-20 03:54:58,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9c50e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:54:58, skipping insertion in model container [2020-07-20 03:54:58,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:54:58" (3/3) ... [2020-07-20 03:54:58,205 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-20 03:54:58,214 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:54:58,222 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:54:58,237 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:54:58,262 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:54:58,263 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:54:58,263 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:54:58,263 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:54:58,264 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:54:58,264 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:54:58,264 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:54:58,264 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:54:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 03:54:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:54:58,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:54:58,293 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] [2020-07-20 03:54:58,294 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:54:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:54:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-20 03:54:58,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:54:58,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154411366] [2020-07-20 03:54:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:54:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:58,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154411366] [2020-07-20 03:54:58,453 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-20 03:54:58,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458593538] [2020-07-20 03:54:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57a40f26 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 03:54:58,565 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57a40f26 issued 1 check-sat command(s) [2020-07-20 03:54:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:54:58,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:54:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:54:58,628 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 03:54:58,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:54:58,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:54:58,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813246445] [2020-07-20 03:54:58,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:54:58,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:54:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:54:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:54:58,655 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-20 03:54:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:54:58,715 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 03:54:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:54:58,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 03:54:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:54:58,730 INFO L225 Difference]: With dead ends: 70 [2020-07-20 03:54:58,731 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 03:54:58,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:54:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 03:54:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 03:54:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 03:54:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-07-20 03:54:58,794 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 37 [2020-07-20 03:54:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:54:58,794 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-07-20 03:54:58,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:54:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-07-20 03:54:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:54:58,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:54:58,798 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] [2020-07-20 03:54:59,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 03:54:59,013 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:54:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:54:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1493850473, now seen corresponding path program 1 times [2020-07-20 03:54:59,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:54:59,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590904352] [2020-07-20 03:54:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:54:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:54:59,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590904352] [2020-07-20 03:54:59,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:54:59,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 03:54:59,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553010769] [2020-07-20 03:54:59,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:54:59,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:54:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:54:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:54:59,185 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 6 states. [2020-07-20 03:54:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:54:59,457 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2020-07-20 03:54:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:54:59,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-07-20 03:54:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:54:59,460 INFO L225 Difference]: With dead ends: 67 [2020-07-20 03:54:59,460 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 03:54:59,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:54:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 03:54:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-07-20 03:54:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:54:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 03:54:59,473 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 37 [2020-07-20 03:54:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:54:59,473 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 03:54:59,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:54:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 03:54:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 03:54:59,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:54:59,476 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 03:54:59,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:54:59,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:54:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:54:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2020-07-20 03:54:59,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:54:59,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393309375] [2020-07-20 03:54:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:54:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:54:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 03:54:59,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393309375] [2020-07-20 03:54:59,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586054032] [2020-07-20 03:54:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b5f760d 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 03:54:59,751 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b5f760d issued 2 check-sat command(s) [2020-07-20 03:54:59,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:54:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:54:59,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:54:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 03:54:59,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:54:59,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 8 [2020-07-20 03:54:59,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269104808] [2020-07-20 03:54:59,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:54:59,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:54:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:54:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:54:59,780 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-07-20 03:55:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:00,055 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-07-20 03:55:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:55:00,056 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-07-20 03:55:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:00,058 INFO L225 Difference]: With dead ends: 74 [2020-07-20 03:55:00,058 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 03:55:00,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:55:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 03:55:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-20 03:55:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 03:55:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-07-20 03:55:00,077 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 48 [2020-07-20 03:55:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:00,078 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-07-20 03:55:00,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:55:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-20 03:55:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 03:55:00,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:00,083 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] [2020-07-20 03:55:00,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:00,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2086694829, now seen corresponding path program 2 times [2020-07-20 03:55:00,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:00,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86217181] [2020-07-20 03:55:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:55:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 03:55:00,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86217181] [2020-07-20 03:55:00,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159048060] [2020-07-20 03:55:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2afc1e19 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:00,472 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2afc1e19 issued 2 check-sat command(s) [2020-07-20 03:55:00,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:00,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:55:00,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 03:55:00,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:00,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2020-07-20 03:55:00,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663561481] [2020-07-20 03:55:00,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:55:00,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:00,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:55:00,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:00,495 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-07-20 03:55:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:00,684 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-07-20 03:55:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:55:00,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-07-20 03:55:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:00,687 INFO L225 Difference]: With dead ends: 78 [2020-07-20 03:55:00,687 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 03:55:00,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:55:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 03:55:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 03:55:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 03:55:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 03:55:00,713 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 59 [2020-07-20 03:55:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:00,713 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 03:55:00,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:55:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 03:55:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:55:00,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:00,715 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2020-07-20 03:55:00,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:00,916 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:00,918 INFO L82 PathProgramCache]: Analyzing trace with hash 399842641, now seen corresponding path program 3 times [2020-07-20 03:55:00,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:00,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266061463] [2020-07-20 03:55:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:55:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 03:55:01,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266061463] [2020-07-20 03:55:01,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198427185] [2020-07-20 03:55:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d6d65ba 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 03:55:01,088 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d6d65ba issued 2 check-sat command(s) [2020-07-20 03:55:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:01,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:55:01,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 03:55:01,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:01,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-07-20 03:55:01,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289028456] [2020-07-20 03:55:01,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:55:01,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:01,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:55:01,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:55:01,108 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 8 states. [2020-07-20 03:55:01,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:01,318 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-07-20 03:55:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:55:01,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-07-20 03:55:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:01,319 INFO L225 Difference]: With dead ends: 80 [2020-07-20 03:55:01,320 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 03:55:01,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:55:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 03:55:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-20 03:55:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:55:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-20 03:55:01,328 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 61 [2020-07-20 03:55:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:01,329 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-20 03:55:01,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:55:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-20 03:55:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 03:55:01,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:01,330 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 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] [2020-07-20 03:55:01,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:01,545 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:01,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1960534735, now seen corresponding path program 4 times [2020-07-20 03:55:01,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:01,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602341260] [2020-07-20 03:55:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:55:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 03:55:01,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602341260] [2020-07-20 03:55:01,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596438327] [2020-07-20 03:55:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5179bbab No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:01,766 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5179bbab issued 2 check-sat command(s) [2020-07-20 03:55:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:55:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 03:55:01,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:01,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 11 [2020-07-20 03:55:01,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108571077] [2020-07-20 03:55:01,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:55:01,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:55:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:55:01,785 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 11 states. [2020-07-20 03:55:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:02,102 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-07-20 03:55:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:55:02,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2020-07-20 03:55:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:02,104 INFO L225 Difference]: With dead ends: 84 [2020-07-20 03:55:02,104 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 03:55:02,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:55:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 03:55:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-20 03:55:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:55:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-07-20 03:55:02,115 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 63 [2020-07-20 03:55:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:02,118 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-07-20 03:55:02,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:55:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-07-20 03:55:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-20 03:55:02,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:02,120 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 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] [2020-07-20 03:55:02,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:55:02,339 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:02,340 INFO L82 PathProgramCache]: Analyzing trace with hash -634264760, now seen corresponding path program 1 times [2020-07-20 03:55:02,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:02,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377096872] [2020-07-20 03:55:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:55:02,359 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:02,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054304817] [2020-07-20 03:55:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67885f3c 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 03:55:02,496 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67885f3c issued 2 check-sat command(s) [2020-07-20 03:55:02,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:02,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:55:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 03:55:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377096872] [2020-07-20 03:55:02,530 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054304817] [2020-07-20 03:55:02,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:02,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-20 03:55:02,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139482189] [2020-07-20 03:55:02,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:55:02,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:55:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:55:02,532 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 5 states. [2020-07-20 03:55:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:02,561 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-07-20 03:55:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:55:02,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-07-20 03:55:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:02,563 INFO L225 Difference]: With dead ends: 76 [2020-07-20 03:55:02,563 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 03:55:02,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 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 03:55:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 03:55:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 03:55:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:55:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-07-20 03:55:02,570 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 74 [2020-07-20 03:55:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:02,571 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-07-20 03:55:02,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:55:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-07-20 03:55:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 03:55:02,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:02,573 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 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] [2020-07-20 03:55:02,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:02,781 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash 251770956, now seen corresponding path program 2 times [2020-07-20 03:55:02,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:02,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817435417] [2020-07-20 03:55:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:55:02,795 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:02,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155131581] [2020-07-20 03:55:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7376a370 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:03,124 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7376a370 issued 2 check-sat command(s) [2020-07-20 03:55:03,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:55:03,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-20 03:55:03,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817435417] [2020-07-20 03:55:03,207 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:03,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155131581] [2020-07-20 03:55:03,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:03,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 03:55:03,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523360053] [2020-07-20 03:55:03,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:55:03,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:03,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:55:03,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:03,210 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2020-07-20 03:55:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:03,245 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-07-20 03:55:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:55:03,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-07-20 03:55:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:03,248 INFO L225 Difference]: With dead ends: 82 [2020-07-20 03:55:03,248 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:55:03,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:55:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 03:55:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 03:55:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-07-20 03:55:03,256 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 83 [2020-07-20 03:55:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:03,257 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-07-20 03:55:03,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:55:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-07-20 03:55:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 03:55:03,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:03,258 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2020-07-20 03:55:03,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:03,473 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash 516945678, now seen corresponding path program 3 times [2020-07-20 03:55:03,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:03,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205713349] [2020-07-20 03:55:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:55:03,490 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:03,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190461821] [2020-07-20 03:55:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bb37be1 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 03:55:05,752 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bb37be1 issued 3 check-sat command(s) [2020-07-20 03:55:05,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:05,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 03:55:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 03:55:05,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205713349] [2020-07-20 03:55:05,776 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:05,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190461821] [2020-07-20 03:55:05,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:05,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:55:05,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853227948] [2020-07-20 03:55:05,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:55:05,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:05,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:55:05,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:55:05,778 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 3 states. [2020-07-20 03:55:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:05,795 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-07-20 03:55:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:55:05,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-07-20 03:55:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:05,797 INFO L225 Difference]: With dead ends: 82 [2020-07-20 03:55:05,797 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 03:55:05,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:55:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 03:55:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-20 03:55:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 03:55:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-20 03:55:05,805 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 92 [2020-07-20 03:55:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:05,805 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-20 03:55:05,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:55:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-20 03:55:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 03:55:05,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:05,807 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2020-07-20 03:55:06,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 03:55:06,021 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 1 times [2020-07-20 03:55:06,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:06,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306045854] [2020-07-20 03:55:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa495a1 [2020-07-20 03:55:06,039 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:06,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818064291] [2020-07-20 03:55:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cd67faa 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