/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:42:05,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:05,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:05,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:05,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:05,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:05,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:05,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:05,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:05,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:05,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:05,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:05,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:05,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:05,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:05,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:05,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:05,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:05,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:05,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:05,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:05,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:05,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:05,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:05,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:05,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:05,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:05,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:05,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:42:05,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:05,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:05,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:05,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:05,233 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:05,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:05,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:05,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:05,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:05,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:05,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:05,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:05,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:05,236 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:05,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:05,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:05,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:05,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:05,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:05,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:05,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:05,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:05,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:05,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:05,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:05,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:05,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:05,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:05,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:05,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:05,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:05,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:05,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:05,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:05,755 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:05,756 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-04 13:42:05,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b883f946b/d56700172de64a14b317a7e56b1e59e0/FLAG9990d3a2c [2020-09-04 13:42:06,405 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:06,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-04 13:42:06,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b883f946b/d56700172de64a14b317a7e56b1e59e0/FLAG9990d3a2c [2020-09-04 13:42:06,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b883f946b/d56700172de64a14b317a7e56b1e59e0 [2020-09-04 13:42:06,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:06,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:06,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:06,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:06,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:06,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:06" (1/1) ... [2020-09-04 13:42:06,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b862195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:06, skipping insertion in model container [2020-09-04 13:42:06,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:06" (1/1) ... [2020-09-04 13:42:06,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:06,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:07,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:07,079 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:07,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:07,125 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:07,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07 WrapperNode [2020-09-04 13:42:07,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:07,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:07,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:07,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:07,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... [2020-09-04 13:42:07,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... [2020-09-04 13:42:07,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... [2020-09-04 13:42:07,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... [2020-09-04 13:42:07,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... [2020-09-04 13:42:07,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... [2020-09-04 13:42:07,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... [2020-09-04 13:42:07,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:07,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:07,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:07,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:07,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:07,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-09-04 13:42:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-09-04 13:42:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-09-04 13:42:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-09-04 13:42:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:42:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:07,761 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:07,762 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-09-04 13:42:07,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:07 BoogieIcfgContainer [2020-09-04 13:42:07,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:07,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:07,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:07,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:07,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:06" (1/3) ... [2020-09-04 13:42:07,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5259947b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:07, skipping insertion in model container [2020-09-04 13:42:07,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:07" (2/3) ... [2020-09-04 13:42:07,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5259947b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:07, skipping insertion in model container [2020-09-04 13:42:07,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:07" (3/3) ... [2020-09-04 13:42:07,777 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-09-04 13:42:07,790 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:07,801 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:07,825 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:07,858 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:07,859 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:07,859 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:07,859 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:07,859 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:07,859 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:07,859 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:07,859 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-04 13:42:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:42:07,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:07,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:07,889 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:07,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-09-04 13:42:07,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:07,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645936436] [2020-09-04 13:42:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:08,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:08,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645936436] [2020-09-04 13:42:08,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:08,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:42:08,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981673595] [2020-09-04 13:42:08,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:08,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:08,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:08,166 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-09-04 13:42:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:08,519 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-09-04 13:42:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:08,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-04 13:42:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:08,535 INFO L225 Difference]: With dead ends: 150 [2020-09-04 13:42:08,536 INFO L226 Difference]: Without dead ends: 89 [2020-09-04 13:42:08,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-04 13:42:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-09-04 13:42:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:42:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-09-04 13:42:08,607 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-09-04 13:42:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:08,608 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-09-04 13:42:08,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-09-04 13:42:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 13:42:08,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:08,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:08,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:08,611 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-09-04 13:42:08,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:08,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192556613] [2020-09-04 13:42:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:08,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:08,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192556613] [2020-09-04 13:42:08,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129076223] [2020-09-04 13:42:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:08,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:08,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-09-04 13:42:08,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513909706] [2020-09-04 13:42:08,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:42:08,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:42:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:42:08,854 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 6 states. [2020-09-04 13:42:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:09,153 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-09-04 13:42:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:42:09,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-04 13:42:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:09,156 INFO L225 Difference]: With dead ends: 170 [2020-09-04 13:42:09,156 INFO L226 Difference]: Without dead ends: 122 [2020-09-04 13:42:09,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:42:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-04 13:42:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-09-04 13:42:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 13:42:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-09-04 13:42:09,172 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-09-04 13:42:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:09,172 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-09-04 13:42:09,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:42:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-09-04 13:42:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:42:09,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:09,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:09,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:42:09,386 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-09-04 13:42:09,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:09,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893240733] [2020-09-04 13:42:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:09,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893240733] [2020-09-04 13:42:09,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581556546] [2020-09-04 13:42:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:09,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-09-04 13:42:09,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:42:09,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:09,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-09-04 13:42:09,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749775918] [2020-09-04 13:42:09,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:09,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:09,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:09,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:42:09,557 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 4 states. [2020-09-04 13:42:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:09,604 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2020-09-04 13:42:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:09,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-09-04 13:42:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:09,606 INFO L225 Difference]: With dead ends: 112 [2020-09-04 13:42:09,606 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:42:09,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:42:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:42:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-09-04 13:42:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-04 13:42:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-09-04 13:42:09,617 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 18 [2020-09-04 13:42:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:09,617 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-09-04 13:42:09,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-09-04 13:42:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:42:09,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:09,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:09,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:09,834 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1841898364, now seen corresponding path program 1 times [2020-09-04 13:42:09,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:09,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447870050] [2020-09-04 13:42:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 13:42:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 13:42:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:09,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447870050] [2020-09-04 13:42:09,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111662010] [2020-09-04 13:42:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-04 13:42:10,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:42:10,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:10,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-09-04 13:42:10,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070699786] [2020-09-04 13:42:10,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:10,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:42:10,072 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 3 states. [2020-09-04 13:42:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:10,108 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-09-04 13:42:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:10,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-04 13:42:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:10,110 INFO L225 Difference]: With dead ends: 125 [2020-09-04 13:42:10,110 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 13:42:10,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:42:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 13:42:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-09-04 13:42:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 13:42:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-09-04 13:42:10,122 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 37 [2020-09-04 13:42:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:10,122 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-09-04 13:42:10,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-09-04 13:42:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 13:42:10,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:10,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:10,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:10,339 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash 581153498, now seen corresponding path program 1 times [2020-09-04 13:42:10,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:10,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786415736] [2020-09-04 13:42:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:42:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-04 13:42:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:42:10,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786415736] [2020-09-04 13:42:10,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056518213] [2020-09-04 13:42:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:42:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:42:10,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:10,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-09-04 13:42:10,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579680514] [2020-09-04 13:42:10,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:42:10,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:42:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:42:10,579 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 8 states. [2020-09-04 13:42:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:10,941 INFO L93 Difference]: Finished difference Result 179 states and 230 transitions. [2020-09-04 13:42:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:42:10,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-09-04 13:42:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:10,945 INFO L225 Difference]: With dead ends: 179 [2020-09-04 13:42:10,945 INFO L226 Difference]: Without dead ends: 128 [2020-09-04 13:42:10,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-04 13:42:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2020-09-04 13:42:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 13:42:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-09-04 13:42:10,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 39 [2020-09-04 13:42:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:10,981 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-09-04 13:42:10,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:42:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-09-04 13:42:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 13:42:10,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:10,986 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-09-04 13:42:11,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:11,203 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:11,203 INFO L82 PathProgramCache]: Analyzing trace with hash -822197896, now seen corresponding path program 2 times [2020-09-04 13:42:11,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:11,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576979469] [2020-09-04 13:42:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:42:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 13:42:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:42:11,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576979469] [2020-09-04 13:42:11,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645652930] [2020-09-04 13:42:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:11,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-09-04 13:42:11,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:11,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-04 13:42:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-04 13:42:11,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:11,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-09-04 13:42:11,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511523369] [2020-09-04 13:42:11,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:42:11,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:42:11,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:42:11,473 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 8 states. [2020-09-04 13:42:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:11,640 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-09-04 13:42:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:42:11,641 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-09-04 13:42:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:11,642 INFO L225 Difference]: With dead ends: 129 [2020-09-04 13:42:11,642 INFO L226 Difference]: Without dead ends: 86 [2020-09-04 13:42:11,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:42:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-04 13:42:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-04 13:42:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-04 13:42:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-09-04 13:42:11,651 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 41 [2020-09-04 13:42:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:11,652 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-09-04 13:42:11,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:42:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-09-04 13:42:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 13:42:11,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:11,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:11,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:42:11,869 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:11,870 INFO L82 PathProgramCache]: Analyzing trace with hash -665199112, now seen corresponding path program 1 times [2020-09-04 13:42:11,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:11,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095862245] [2020-09-04 13:42:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:42:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 13:42:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-04 13:42:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-04 13:42:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-04 13:42:11,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095862245] [2020-09-04 13:42:11,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114953484] [2020-09-04 13:42:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:42:12,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-04 13:42:12,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:12,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-09-04 13:42:12,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549741375] [2020-09-04 13:42:12,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:42:12,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:42:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:42:12,113 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 9 states. [2020-09-04 13:42:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:12,517 INFO L93 Difference]: Finished difference Result 260 states and 340 transitions. [2020-09-04 13:42:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:42:12,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-09-04 13:42:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:12,520 INFO L225 Difference]: With dead ends: 260 [2020-09-04 13:42:12,520 INFO L226 Difference]: Without dead ends: 198 [2020-09-04 13:42:12,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:42:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-04 13:42:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 77. [2020-09-04 13:42:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-04 13:42:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-09-04 13:42:12,535 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 58 [2020-09-04 13:42:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:12,535 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-09-04 13:42:12,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:42:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-09-04 13:42:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 13:42:12,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:12,538 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:12,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:12,753 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash -997532006, now seen corresponding path program 2 times [2020-09-04 13:42:12,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:12,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662825239] [2020-09-04 13:42:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:42:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:42:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 13:42:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 13:42:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-04 13:42:12,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662825239] [2020-09-04 13:42:12,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823409722] [2020-09-04 13:42:12,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:12,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-09-04 13:42:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:42:12,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-04 13:42:13,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:13,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2020-09-04 13:42:13,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847165507] [2020-09-04 13:42:13,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:42:13,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:42:13,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:42:13,064 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 10 states. [2020-09-04 13:42:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:13,540 INFO L93 Difference]: Finished difference Result 216 states and 294 transitions. [2020-09-04 13:42:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:42:13,541 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-04 13:42:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:13,548 INFO L225 Difference]: With dead ends: 216 [2020-09-04 13:42:13,548 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 13:42:13,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:42:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 13:42:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 90. [2020-09-04 13:42:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 13:42:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-09-04 13:42:13,574 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 60 [2020-09-04 13:42:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:13,575 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-09-04 13:42:13,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:42:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-09-04 13:42:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 13:42:13,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:13,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:13,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:13,788 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash 420057297, now seen corresponding path program 1 times [2020-09-04 13:42:13,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:13,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887340721] [2020-09-04 13:42:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:42:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:42:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 13:42:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 13:42:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-04 13:42:13,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887340721] [2020-09-04 13:42:13,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750709307] [2020-09-04 13:42:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:42:13,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 13:42:14,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:14,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-09-04 13:42:14,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408299142] [2020-09-04 13:42:14,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:42:14,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:42:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:42:14,031 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 11 states. [2020-09-04 13:42:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:14,756 INFO L93 Difference]: Finished difference Result 528 states and 725 transitions. [2020-09-04 13:42:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 13:42:14,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-04 13:42:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:14,760 INFO L225 Difference]: With dead ends: 528 [2020-09-04 13:42:14,761 INFO L226 Difference]: Without dead ends: 453 [2020-09-04 13:42:14,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:42:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-09-04 13:42:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 94. [2020-09-04 13:42:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 13:42:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-09-04 13:42:14,785 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 60 [2020-09-04 13:42:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:14,785 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-09-04 13:42:14,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:42:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-09-04 13:42:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-04 13:42:14,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:14,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:15,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:42:15,003 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1850595157, now seen corresponding path program 2 times [2020-09-04 13:42:15,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:15,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204676531] [2020-09-04 13:42:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-04 13:42:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:42:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-04 13:42:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-04 13:42:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-04 13:42:15,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204676531] [2020-09-04 13:42:15,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607414130] [2020-09-04 13:42:15,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:15,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:15,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:15,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:42:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-04 13:42:15,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:15,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-09-04 13:42:15,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814279195] [2020-09-04 13:42:15,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:42:15,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:15,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:42:15,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:42:15,293 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 11 states. [2020-09-04 13:42:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:15,821 INFO L93 Difference]: Finished difference Result 384 states and 524 transitions. [2020-09-04 13:42:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:42:15,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-09-04 13:42:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:15,825 INFO L225 Difference]: With dead ends: 384 [2020-09-04 13:42:15,825 INFO L226 Difference]: Without dead ends: 307 [2020-09-04 13:42:15,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:42:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-09-04 13:42:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 96. [2020-09-04 13:42:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 13:42:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-09-04 13:42:15,840 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 64 [2020-09-04 13:42:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:15,841 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-09-04 13:42:15,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:42:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-09-04 13:42:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-04 13:42:15,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:15,843 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:16,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:16,058 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash 728782455, now seen corresponding path program 3 times [2020-09-04 13:42:16,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:16,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868486912] [2020-09-04 13:42:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 13:42:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:42:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-04 13:42:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-04 13:42:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-04 13:42:16,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868486912] [2020-09-04 13:42:16,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957248530] [2020-09-04 13:42:16,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:16,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-04 13:42:16,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:16,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:42:16,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:16,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2020-09-04 13:42:16,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45470286] [2020-09-04 13:42:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:16,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:16,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:42:16,426 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 7 states. [2020-09-04 13:42:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:16,554 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2020-09-04 13:42:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:42:16,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-09-04 13:42:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:16,557 INFO L225 Difference]: With dead ends: 185 [2020-09-04 13:42:16,557 INFO L226 Difference]: Without dead ends: 115 [2020-09-04 13:42:16,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:42:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-04 13:42:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2020-09-04 13:42:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-04 13:42:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2020-09-04 13:42:16,570 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 66 [2020-09-04 13:42:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:16,571 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2020-09-04 13:42:16,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2020-09-04 13:42:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 13:42:16,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:16,573 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:16,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:16,786 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1402871403, now seen corresponding path program 1 times [2020-09-04 13:42:16,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:16,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285391806] [2020-09-04 13:42:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 13:42:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:42:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:42:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 13:42:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-04 13:42:16,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285391806] [2020-09-04 13:42:16,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043265225] [2020-09-04 13:42:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:16,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-04 13:42:17,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:17,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2020-09-04 13:42:17,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51084012] [2020-09-04 13:42:17,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:42:17,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:42:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:42:17,016 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 12 states. [2020-09-04 13:42:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:17,574 INFO L93 Difference]: Finished difference Result 404 states and 543 transitions. [2020-09-04 13:42:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:42:17,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-09-04 13:42:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:17,581 INFO L225 Difference]: With dead ends: 404 [2020-09-04 13:42:17,581 INFO L226 Difference]: Without dead ends: 323 [2020-09-04 13:42:17,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:42:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-09-04 13:42:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 102. [2020-09-04 13:42:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-04 13:42:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-09-04 13:42:17,607 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 69 [2020-09-04 13:42:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:17,607 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-09-04 13:42:17,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:42:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2020-09-04 13:42:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-04 13:42:17,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:17,609 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:17,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-04 13:42:17,823 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash -973371469, now seen corresponding path program 2 times [2020-09-04 13:42:17,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:17,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310106398] [2020-09-04 13:42:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:17,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:42:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:17,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-04 13:42:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:17,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 13:42:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:17,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-04 13:42:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-04 13:42:18,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310106398] [2020-09-04 13:42:18,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927259453] [2020-09-04 13:42:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:18,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:18,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-04 13:42:18,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-04 13:42:18,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:18,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2020-09-04 13:42:18,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892633042] [2020-09-04 13:42:18,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:42:18,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:42:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:42:18,142 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand 13 states. [2020-09-04 13:42:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:18,694 INFO L93 Difference]: Finished difference Result 440 states and 594 transitions. [2020-09-04 13:42:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:42:18,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-09-04 13:42:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:18,699 INFO L225 Difference]: With dead ends: 440 [2020-09-04 13:42:18,699 INFO L226 Difference]: Without dead ends: 359 [2020-09-04 13:42:18,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:42:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-09-04 13:42:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 104. [2020-09-04 13:42:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-04 13:42:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2020-09-04 13:42:18,715 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 71 [2020-09-04 13:42:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:18,716 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2020-09-04 13:42:18,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:42:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2020-09-04 13:42:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:42:18,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:18,717 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:18,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:42:18,932 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash -540795311, now seen corresponding path program 3 times [2020-09-04 13:42:18,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:18,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295748934] [2020-09-04 13:42:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:42:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-04 13:42:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 13:42:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-04 13:42:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-04 13:42:19,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295748934] [2020-09-04 13:42:19,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068357093] [2020-09-04 13:42:19,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:19,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-04 13:42:19,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:19,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:42:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-04 13:42:19,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:19,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2020-09-04 13:42:19,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247137028] [2020-09-04 13:42:19,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:19,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:42:19,184 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand 4 states. [2020-09-04 13:42:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:19,211 INFO L93 Difference]: Finished difference Result 172 states and 212 transitions. [2020-09-04 13:42:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:19,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-09-04 13:42:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:19,213 INFO L225 Difference]: With dead ends: 172 [2020-09-04 13:42:19,214 INFO L226 Difference]: Without dead ends: 114 [2020-09-04 13:42:19,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:42:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-04 13:42:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2020-09-04 13:42:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-04 13:42:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-09-04 13:42:19,225 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 73 [2020-09-04 13:42:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:19,226 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-09-04 13:42:19,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-09-04 13:42:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:42:19,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:19,227 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:19,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:42:19,440 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash 416452360, now seen corresponding path program 1 times [2020-09-04 13:42:19,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:19,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255720985] [2020-09-04 13:42:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:42:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-04 13:42:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 13:42:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-04 13:42:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 13:42:19,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255720985] [2020-09-04 13:42:19,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738191171] [2020-09-04 13:42:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:19,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:42:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 13:42:19,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:19,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2020-09-04 13:42:19,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240648918] [2020-09-04 13:42:19,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:42:19,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:42:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:42:19,747 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 14 states. [2020-09-04 13:42:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:20,443 INFO L93 Difference]: Finished difference Result 480 states and 634 transitions. [2020-09-04 13:42:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:42:20,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-09-04 13:42:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:20,446 INFO L225 Difference]: With dead ends: 480 [2020-09-04 13:42:20,447 INFO L226 Difference]: Without dead ends: 396 [2020-09-04 13:42:20,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:42:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-09-04 13:42:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 109. [2020-09-04 13:42:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-04 13:42:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-09-04 13:42:20,462 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 73 [2020-09-04 13:42:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:20,462 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-09-04 13:42:20,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:42:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-09-04 13:42:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-04 13:42:20,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:20,464 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:20,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:20,677 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:20,678 INFO L82 PathProgramCache]: Analyzing trace with hash -489687514, now seen corresponding path program 2 times [2020-09-04 13:42:20,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:20,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801379535] [2020-09-04 13:42:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:20,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:20,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:42:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:20,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 13:42:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:20,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-04 13:42:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:20,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 13:42:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 13:42:20,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801379535] [2020-09-04 13:42:20,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138314967] [2020-09-04 13:42:20,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:20,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:20,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-04 13:42:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 13:42:20,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:20,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2020-09-04 13:42:20,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847628603] [2020-09-04 13:42:20,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:42:20,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:20,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:42:20,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:42:20,955 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 15 states. [2020-09-04 13:42:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:21,888 INFO L93 Difference]: Finished difference Result 516 states and 684 transitions. [2020-09-04 13:42:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:42:21,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-09-04 13:42:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:21,893 INFO L225 Difference]: With dead ends: 516 [2020-09-04 13:42:21,893 INFO L226 Difference]: Without dead ends: 432 [2020-09-04 13:42:21,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:42:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-09-04 13:42:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 111. [2020-09-04 13:42:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-04 13:42:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2020-09-04 13:42:21,954 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 75 [2020-09-04 13:42:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:21,955 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2020-09-04 13:42:21,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:42:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2020-09-04 13:42:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-04 13:42:21,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:21,957 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:22,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-04 13:42:22,171 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash 588254660, now seen corresponding path program 3 times [2020-09-04 13:42:22,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:22,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893891256] [2020-09-04 13:42:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:22,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:22,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:42:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:22,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-04 13:42:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:22,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 13:42:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:22,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-04 13:42:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 13:42:22,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893891256] [2020-09-04 13:42:22,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830432798] [2020-09-04 13:42:22,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:22,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-04 13:42:22,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:42:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-09-04 13:42:22,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:22,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2020-09-04 13:42:22,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150257025] [2020-09-04 13:42:22,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:42:22,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:22,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:42:22,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:42:22,494 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand 5 states. [2020-09-04 13:42:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:22,552 INFO L93 Difference]: Finished difference Result 131 states and 153 transitions. [2020-09-04 13:42:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:42:22,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-09-04 13:42:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:22,553 INFO L225 Difference]: With dead ends: 131 [2020-09-04 13:42:22,554 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:42:22,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:42:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:42:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:42:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:42:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:42:22,556 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2020-09-04 13:42:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:22,556 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:42:22,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:42:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:42:22,556 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:42:22,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-04 13:42:22,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:42:23,163 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-09-04 13:42:23,163 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:42:23,163 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-04 13:42:23,164 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-09-04 13:42:23,164 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:42:23,164 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (or (not (<= |elem_exists_#in~size| 0)) (and (<= 0 elem_exists_~i~0) (<= elem_exists_~size |elem_exists_#in~size|))) [2020-09-04 13:42:23,164 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-09-04 13:42:23,165 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:42:23,165 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-04 13:42:23,165 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:42:23,165 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-09-04 13:42:23,165 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-09-04 13:42:23,165 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-09-04 13:42:23,166 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:42:23,166 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:42:23,166 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:42:23,166 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:42:23,166 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-09-04 13:42:23,166 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-09-04 13:42:23,167 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-09-04 13:42:23,167 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-09-04 13:42:23,167 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-09-04 13:42:23,167 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-09-04 13:42:23,167 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-09-04 13:42:23,168 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-09-04 13:42:23,168 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-09-04 13:42:23,168 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-09-04 13:42:23,168 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-09-04 13:42:23,168 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-09-04 13:42:23,168 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-09-04 13:42:23,169 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-09-04 13:42:23,169 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-09-04 13:42:23,169 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-09-04 13:42:23,169 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-09-04 13:42:23,169 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-09-04 13:42:23,169 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-09-04 13:42:23,170 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-09-04 13:42:23,170 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-09-04 13:42:23,170 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-09-04 13:42:23,170 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (<= 0 main_~x~0)) [2020-09-04 13:42:23,170 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-09-04 13:42:23,170 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-09-04 13:42:23,170 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-09-04 13:42:23,171 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-09-04 13:42:23,171 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-09-04 13:42:23,171 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-09-04 13:42:23,171 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-09-04 13:42:23,171 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-09-04 13:42:23,171 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-09-04 13:42:23,171 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~n~0 1)) [2020-09-04 13:42:23,172 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-09-04 13:42:23,172 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-09-04 13:42:23,172 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-09-04 13:42:23,172 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-09-04 13:42:23,172 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 1 main_~y~0) (<= main_~n~0 1)) [2020-09-04 13:42:23,172 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-09-04 13:42:23,172 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-09-04 13:42:23,173 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-09-04 13:42:23,173 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-09-04 13:42:23,173 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-09-04 13:42:23,173 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-09-04 13:42:23,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:23 BoogieIcfgContainer [2020-09-04 13:42:23,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:23,207 INFO L168 Benchmark]: Toolchain (without parser) took 16447.23 ms. Allocated memory was 140.0 MB in the beginning and 348.1 MB in the end (delta: 208.1 MB). Free memory was 103.9 MB in the beginning and 187.7 MB in the end (delta: -83.8 MB). Peak memory consumption was 124.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:23,207 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:42:23,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 440.59 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 103.6 MB in the beginning and 181.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:23,209 INFO L168 Benchmark]: Boogie Preprocessor took 79.91 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:23,210 INFO L168 Benchmark]: RCFGBuilder took 485.52 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 154.9 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:23,211 INFO L168 Benchmark]: TraceAbstraction took 15433.55 ms. Allocated memory was 201.9 MB in the beginning and 348.1 MB in the end (delta: 146.3 MB). Free memory was 154.9 MB in the beginning and 187.7 MB in the end (delta: -32.7 MB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:23,214 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 440.59 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 103.6 MB in the beginning and 181.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.91 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 485.52 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 154.9 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15433.55 ms. Allocated memory was 201.9 MB in the beginning and 348.1 MB in the end (delta: 146.3 MB). Free memory was 154.9 MB in the beginning and 187.7 MB in the end (delta: -32.7 MB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && 0 <= x - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: !(\old(size) <= 0) || (0 <= i && size <= \old(size)) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 0 <= x && n <= 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: (0 <= x && 1 <= y) && n <= 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 17, TraceHistogramMax: 10, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1151 SDtfs, 2036 SDslu, 3187 SDs, 0 SdLazy, 3795 SolverSat, 1045 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1191 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 2057 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 162 PreInvPairs, 186 NumberOfFragments, 117 HoareAnnotationTreeSize, 162 FomulaSimplifications, 3537 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 211 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 1808 NumberOfCodeBlocks, 1715 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1775 ConstructedInterpolants, 0 QuantifiedInterpolants, 170337 SizeOfPredicates, 31 NumberOfNonLiveVariables, 3190 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 33 InterpolantComputations, 8 PerfectInterpolantSequences, 713/1486 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...