/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/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:10,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:10,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:10,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:10,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:10,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:10,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:10,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:10,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:10,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:10,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:10,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:10,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:10,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:10,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:10,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:10,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:10,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:10,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:10,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:10,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:10,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:10,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:10,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:10,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:10,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:10,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:10,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:10,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:56:10,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:10,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:10,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:10,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:10,426 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:10,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:10,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:10,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:10,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:10,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:10,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:10,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:10,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:10,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:10,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:10,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:10,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:10,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:10,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:10,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:10,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:10,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:10,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:10,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:10,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:10,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:10,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:10,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:10,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:10,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:10,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:10,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:10,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:10,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:10,726 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:10,727 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-08-22 16:56:10,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065f46aea/6f2ea81fedd04ac1bd0fa1c314964fc8/FLAGe13aa11e8 [2020-08-22 16:56:11,196 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:11,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-08-22 16:56:11,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065f46aea/6f2ea81fedd04ac1bd0fa1c314964fc8/FLAGe13aa11e8 [2020-08-22 16:56:11,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065f46aea/6f2ea81fedd04ac1bd0fa1c314964fc8 [2020-08-22 16:56:11,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:11,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:11,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:11,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:11,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:11,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556f7c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11, skipping insertion in model container [2020-08-22 16:56:11,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:11,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:11,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:11,821 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:11,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:11,859 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:11,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11 WrapperNode [2020-08-22 16:56:11,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:11,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:11,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:11,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:11,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... [2020-08-22 16:56:11,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:11,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:11,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:11,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:11,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-08-22 16:56:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-08-22 16:56:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-08-22 16:56:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-08-22 16:56:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:56:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:12,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:12,393 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:12,394 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:56:12,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:12 BoogieIcfgContainer [2020-08-22 16:56:12,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:12,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:12,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:12,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:12,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:11" (1/3) ... [2020-08-22 16:56:12,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355fe400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:12, skipping insertion in model container [2020-08-22 16:56:12,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:11" (2/3) ... [2020-08-22 16:56:12,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355fe400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:12, skipping insertion in model container [2020-08-22 16:56:12,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:12" (3/3) ... [2020-08-22 16:56:12,408 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-08-22 16:56:12,419 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:12,426 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:12,441 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:12,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:12,467 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:12,467 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:12,467 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:12,467 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:12,468 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:12,468 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:12,468 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-08-22 16:56:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:56:12,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:12,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:12,512 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-08-22 16:56:12,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:12,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5441688] [2020-08-22 16:56:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 16:56:12,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5441688] [2020-08-22 16:56:12,738 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-08-22 16:56:12,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381165937] [2020-08-22 16:56:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2020-08-22 16:56:12,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:56:12,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:12,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 16:56:12,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190620825] [2020-08-22 16:56:12,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 16:56:12,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:12,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 16:56:12,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:12,915 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-08-22 16:56:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:12,942 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-08-22 16:56:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 16:56:12,943 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-08-22 16:56:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:12,953 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:56:12,953 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:56:12,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:56:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 16:56:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:56:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-08-22 16:56:13,007 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2020-08-22 16:56:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:13,008 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-08-22 16:56:13,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 16:56:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-08-22 16:56:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:56:13,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:13,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:13,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-08-22 16:56:13,220 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2020-08-22 16:56:13,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:13,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061971873] [2020-08-22 16:56:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:13,262 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:13,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125610934] [2020-08-22 16:56:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:56:13,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061971873] [2020-08-22 16:56:13,365 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:13,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125610934] [2020-08-22 16:56:13,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:13,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:13,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759556974] [2020-08-22 16:56:13,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:13,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:13,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:13,369 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-08-22 16:56:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:13,398 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-08-22 16:56:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:13,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-08-22 16:56:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:13,402 INFO L225 Difference]: With dead ends: 57 [2020-08-22 16:56:13,402 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:56:13,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:56:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 16:56:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 16:56:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-08-22 16:56:13,416 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-08-22 16:56:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:13,417 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-08-22 16:56:13,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-08-22 16:56:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:56:13,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:13,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:13,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:13,634 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:13,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-08-22 16:56:13,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:13,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181014875] [2020-08-22 16:56:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 16:56:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 16:56:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:56:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:56:13,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181014875] [2020-08-22 16:56:13,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:13,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:56:13,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402179278] [2020-08-22 16:56:13,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:56:13,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:56:13,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:13,797 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2020-08-22 16:56:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:14,131 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-08-22 16:56:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:56:14,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-08-22 16:56:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:14,133 INFO L225 Difference]: With dead ends: 65 [2020-08-22 16:56:14,133 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:56:14,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:56:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:56:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-08-22 16:56:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 16:56:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-08-22 16:56:14,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-08-22 16:56:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:14,145 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-08-22 16:56:14,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:56:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-08-22 16:56:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 16:56:14,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:14,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:14,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:56:14,147 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-08-22 16:56:14,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:14,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97099277] [2020-08-22 16:56:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 16:56:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 16:56:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:56:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:56:14,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97099277] [2020-08-22 16:56:14,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815386279] [2020-08-22 16:56:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:56:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:56:14,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:14,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-08-22 16:56:14,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727269643] [2020-08-22 16:56:14,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:56:14,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:56:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:14,517 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-08-22 16:56:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:14,818 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-08-22 16:56:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:56:14,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-08-22 16:56:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:14,819 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:56:14,820 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 16:56:14,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:56:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 16:56:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-08-22 16:56:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 16:56:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-08-22 16:56:14,829 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-08-22 16:56:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:14,830 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-08-22 16:56:14,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:56:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-08-22 16:56:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:56:14,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:14,832 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:15,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:15,045 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:15,046 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-08-22 16:56:15,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:15,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359234942] [2020-08-22 16:56:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:56:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 16:56:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:56:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 16:56:15,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359234942] [2020-08-22 16:56:15,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125260751] [2020-08-22 16:56:15,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:15,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:56:15,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:15,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 16:56:15,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:15,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2020-08-22 16:56:15,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153150912] [2020-08-22 16:56:15,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:15,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:15,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:15,281 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-08-22 16:56:15,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:15,346 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-08-22 16:56:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:15,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-08-22 16:56:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:15,347 INFO L225 Difference]: With dead ends: 65 [2020-08-22 16:56:15,348 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 16:56:15,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 16:56:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-22 16:56:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:56:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-08-22 16:56:15,357 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-08-22 16:56:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:15,358 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-08-22 16:56:15,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-08-22 16:56:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 16:56:15,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:15,359 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:15,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:15,561 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-08-22 16:56:15,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:15,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693744672] [2020-08-22 16:56:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:56:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 16:56:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 16:56:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:56:15,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693744672] [2020-08-22 16:56:15,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768840628] [2020-08-22 16:56:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:56:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 16:56:15,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:15,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-08-22 16:56:15,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498402635] [2020-08-22 16:56:15,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:56:15,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:15,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:56:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:15,860 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 10 states. [2020-08-22 16:56:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:16,183 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-22 16:56:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:56:16,184 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-08-22 16:56:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:16,186 INFO L225 Difference]: With dead ends: 70 [2020-08-22 16:56:16,186 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 16:56:16,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:56:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 16:56:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 16:56:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:56:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-08-22 16:56:16,196 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-08-22 16:56:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:16,196 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-08-22 16:56:16,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:56:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-08-22 16:56:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 16:56:16,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:16,198 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:16,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:56:16,412 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-08-22 16:56:16,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:16,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440357655] [2020-08-22 16:56:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:56:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 16:56:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:56:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-08-22 16:56:16,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440357655] [2020-08-22 16:56:16,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:16,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:56:16,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565680334] [2020-08-22 16:56:16,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:56:16,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:56:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:56:16,611 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 6 states. [2020-08-22 16:56:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:16,769 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-22 16:56:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:56:16,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-22 16:56:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:16,772 INFO L225 Difference]: With dead ends: 69 [2020-08-22 16:56:16,772 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 16:56:16,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 16:56:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-08-22 16:56:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 16:56:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-08-22 16:56:16,780 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-08-22 16:56:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:16,780 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-08-22 16:56:16,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:56:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-08-22 16:56:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 16:56:16,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:16,782 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:16,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 16:56:16,782 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:16,783 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-08-22 16:56:16,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:16,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439005120] [2020-08-22 16:56:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:56:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 16:56:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:56:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-22 16:56:16,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439005120] [2020-08-22 16:56:16,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:16,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 16:56:16,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712003086] [2020-08-22 16:56:16,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:56:16,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:16,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:56:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:56:16,987 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 11 states. [2020-08-22 16:56:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:17,279 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-08-22 16:56:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:56:17,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-08-22 16:56:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:17,281 INFO L225 Difference]: With dead ends: 74 [2020-08-22 16:56:17,282 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 16:56:17,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:56:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 16:56:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-08-22 16:56:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 16:56:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-08-22 16:56:17,302 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-08-22 16:56:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:17,303 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-08-22 16:56:17,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:56:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-08-22 16:56:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 16:56:17,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:17,308 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:17,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 16:56:17,309 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-08-22 16:56:17,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:17,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64056481] [2020-08-22 16:56:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:17,347 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:17,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218252816] [2020-08-22 16:56:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-08-22 16:56:17,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64056481] [2020-08-22 16:56:17,523 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:17,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218252816] [2020-08-22 16:56:17,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:17,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 16:56:17,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005814357] [2020-08-22 16:56:17,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:56:17,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:56:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:56:17,525 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 9 states. [2020-08-22 16:56:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:17,666 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2020-08-22 16:56:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:56:17,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 16:56:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:17,668 INFO L225 Difference]: With dead ends: 120 [2020-08-22 16:56:17,668 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 16:56:17,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 16:56:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-08-22 16:56:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 16:56:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-08-22 16:56:17,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 65 [2020-08-22 16:56:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:17,696 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-08-22 16:56:17,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:56:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-08-22 16:56:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 16:56:17,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:17,697 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:17,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:17,914 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:17,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-08-22 16:56:17,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:17,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94022842] [2020-08-22 16:56:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:56:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:56:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 16:56:18,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94022842] [2020-08-22 16:56:18,038 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-08-22 16:56:18,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831004371] [2020-08-22 16:56:18,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:18,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:56:18,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:18,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-08-22 16:56:18,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:18,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 16:56:18,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316277148] [2020-08-22 16:56:18,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:56:18,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:56:18,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:56:18,203 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-08-22 16:56:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:18,325 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-08-22 16:56:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:56:18,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-08-22 16:56:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:18,327 INFO L225 Difference]: With dead ends: 99 [2020-08-22 16:56:18,327 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:56:18,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:56:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:56:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-08-22 16:56:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 16:56:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-08-22 16:56:18,338 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2020-08-22 16:56:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:18,338 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-08-22 16:56:18,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:56:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-08-22 16:56:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:56:18,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:18,340 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:18,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-08-22 16:56:18,553 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-08-22 16:56:18,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:18,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830758297] [2020-08-22 16:56:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:18,565 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:18,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098750850] [2020-08-22 16:56:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:56:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-08-22 16:56:18,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830758297] [2020-08-22 16:56:18,710 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:18,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098750850] [2020-08-22 16:56:18,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:18,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 16:56:18,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372381365] [2020-08-22 16:56:18,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:56:18,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:56:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:18,713 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 8 states. [2020-08-22 16:56:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:18,804 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-08-22 16:56:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:56:18,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-22 16:56:18,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:18,808 INFO L225 Difference]: With dead ends: 94 [2020-08-22 16:56:18,808 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:56:18,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:56:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:56:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-22 16:56:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:56:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-08-22 16:56:18,828 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 73 [2020-08-22 16:56:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:18,828 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-08-22 16:56:18,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:56:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-08-22 16:56:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 16:56:18,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:18,829 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:19,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-08-22 16:56:19,046 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-08-22 16:56:19,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:19,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331400030] [2020-08-22 16:56:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:19,060 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:19,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207280112] [2020-08-22 16:56:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:19,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:56:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-08-22 16:56:19,507 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:19,596 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:19,647 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:56:19,647 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:56:19,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:19,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:19 BoogieIcfgContainer [2020-08-22 16:56:19,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:19,935 INFO L168 Benchmark]: Toolchain (without parser) took 8357.68 ms. Allocated memory was 139.5 MB in the beginning and 280.5 MB in the end (delta: 141.0 MB). Free memory was 102.8 MB in the beginning and 237.8 MB in the end (delta: -135.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:19,935 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:19,936 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.64 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:19,937 INFO L168 Benchmark]: Boogie Preprocessor took 122.66 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:19,938 INFO L168 Benchmark]: RCFGBuilder took 415.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 160.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:19,939 INFO L168 Benchmark]: TraceAbstraction took 7531.52 ms. Allocated memory was 201.9 MB in the beginning and 280.5 MB in the end (delta: 78.6 MB). Free memory was 160.0 MB in the beginning and 237.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 822.1 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:19,942 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.64 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.66 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 160.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7531.52 ms. Allocated memory was 201.9 MB in the beginning and 280.5 MB in the end (delta: 78.6 MB). Free memory was 160.0 MB in the beginning and 237.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 822.1 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=7, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={3:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={3:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={3:0}, x={3:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={3:0}, x={3:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={3:0}, x={3:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={3:0}, x={3:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={3:0}, x={3:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={3:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={3:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={3:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2, x={3:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=-2, temp=3, x={3:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={3:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2, ret=-2, temp=3, x={3:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=-2, ret2=-2, temp=2, x={3:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=2, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={3:0}, x={3:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2, cnt=1, i=3, N=3, ret=2, x={3:0}, x={3:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=2, ret=-2, ret2=-2, temp=2, x={3:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-2, ret2=-2, ret5=2, temp=2, x={3:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-2, ret2=-2, ret5=2, temp=2, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.3s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 330 SDtfs, 380 SDslu, 557 SDs, 0 SdLazy, 954 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 566 GetRequests, 453 SyntacticMatches, 10 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 27 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 887 NumberOfCodeBlocks, 867 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 693 ConstructedInterpolants, 0 QuantifiedInterpolants, 74591 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1422 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 677/727 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...