/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/poly1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:53:22,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:53:22,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:53:22,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:53:22,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:53:22,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:53:22,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:53:22,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:53:22,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:53:22,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:53:22,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:53:22,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:53:22,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:53:22,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:53:22,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:53:22,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:53:22,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:53:22,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:53:22,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:53:22,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:53:22,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:53:22,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:53:22,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:53:22,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:53:22,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:53:22,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:53:22,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:53:22,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:53:22,220 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 [2019-11-06 18:53:22,241 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:53:22,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:53:22,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:53:22,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:53:22,243 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:53:22,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:53:22,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:53:22,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:53:22,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:53:22,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:53:22,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:53:22,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:53:22,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:53:22,244 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:53:22,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:53:22,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:53:22,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:53:22,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:53:22,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:53:22,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:53:22,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:53:22,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:53:22,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:53:22,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:53:22,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:53:22,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:53:22,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:53:22,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:53:22,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:53:22,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:53:22,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:53:22,524 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:53:22,527 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:53:22,527 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:53:22,528 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly1.c [2019-11-06 18:53:22,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0c0a8783/208156978073459989949ced3d446235/FLAG68f53957d [2019-11-06 18:53:23,023 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:53:23,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c [2019-11-06 18:53:23,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0c0a8783/208156978073459989949ced3d446235/FLAG68f53957d [2019-11-06 18:53:23,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0c0a8783/208156978073459989949ced3d446235 [2019-11-06 18:53:23,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:53:23,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:53:23,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:23,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:53:23,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:53:23,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcaa57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23, skipping insertion in model container [2019-11-06 18:53:23,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,421 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:53:23,440 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:53:23,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:23,605 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:53:23,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:23,633 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:53:23,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23 WrapperNode [2019-11-06 18:53:23,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:23,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:53:23,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:53:23,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:53:23,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:53:23,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:53:23,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:53:23,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:53:23,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (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 [2019-11-06 18:53:23,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:53:23,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:53:23,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:53:23,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:53:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:53:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:53:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:53:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:53:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:53:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:53:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:53:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:53:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:53:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:53:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:53:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:53:24,071 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:53:24,072 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:53:24,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:24 BoogieIcfgContainer [2019-11-06 18:53:24,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:53:24,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:53:24,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:53:24,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:53:24,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:53:23" (1/3) ... [2019-11-06 18:53:24,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4005b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:24, skipping insertion in model container [2019-11-06 18:53:24,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23" (2/3) ... [2019-11-06 18:53:24,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4005b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:24, skipping insertion in model container [2019-11-06 18:53:24,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:24" (3/3) ... [2019-11-06 18:53:24,094 INFO L109 eAbstractionObserver]: Analyzing ICFG poly1.c [2019-11-06 18:53:24,102 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:53:24,108 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:53:24,119 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:53:24,142 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:53:24,143 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:53:24,143 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:53:24,143 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:53:24,143 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:53:24,143 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:53:24,143 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:53:24,143 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:53:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-06 18:53:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:53:24,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:24,167 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:24,169 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:24,174 INFO L82 PathProgramCache]: Analyzing trace with hash -516860939, now seen corresponding path program 1 times [2019-11-06 18:53:24,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:24,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518123477] [2019-11-06 18:53:24,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:24,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518123477] [2019-11-06 18:53:24,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:24,362 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:53:24,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162744744] [2019-11-06 18:53:24,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:53:24,367 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:24,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:53:24,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:24,384 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-06 18:53:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:24,497 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-11-06 18:53:24,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:53:24,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 18:53:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:24,507 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:53:24,507 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:53:24,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:53:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:53:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:53:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-06 18:53:24,546 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-11-06 18:53:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:24,547 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-06 18:53:24,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:53:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-06 18:53:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:53:24,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:24,549 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:24,549 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:24,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1546915729, now seen corresponding path program 1 times [2019-11-06 18:53:24,550 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:24,550 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207810183] [2019-11-06 18:53:24,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:24,579 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:24,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232675543] [2019-11-06 18:53:24,580 INFO L94 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 [2019-11-06 18:53:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:53:24,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:24,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207810183] [2019-11-06 18:53:24,721 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:24,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232675543] [2019-11-06 18:53:24,722 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:24,722 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:53:24,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993692716] [2019-11-06 18:53:24,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:53:24,724 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:24,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:53:24,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:24,726 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2019-11-06 18:53:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:24,765 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-06 18:53:24,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:53:24,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 18:53:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:24,767 INFO L225 Difference]: With dead ends: 33 [2019-11-06 18:53:24,768 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 18:53:24,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 18:53:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-06 18:53:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:53:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-06 18:53:24,776 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2019-11-06 18:53:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:24,777 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-06 18:53:24,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:53:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-06 18:53:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:53:24,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:24,778 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:24,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:24,982 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash -586037587, now seen corresponding path program 1 times [2019-11-06 18:53:24,984 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:24,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812236361] [2019-11-06 18:53:24,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:25,011 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:25,012 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101878499] [2019-11-06 18:53:25,012 INFO L94 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 [2019-11-06 18:53:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:53:25,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:25,100 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812236361] [2019-11-06 18:53:25,100 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:25,100 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101878499] [2019-11-06 18:53:25,100 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:25,100 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:53:25,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142354737] [2019-11-06 18:53:25,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:53:25,102 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:25,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:53:25,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:25,102 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2019-11-06 18:53:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:25,162 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-06 18:53:25,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:53:25,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:53:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:25,164 INFO L225 Difference]: With dead ends: 35 [2019-11-06 18:53:25,164 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:53:25,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:53:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-06 18:53:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 18:53:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-06 18:53:25,171 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2019-11-06 18:53:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:25,172 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-06 18:53:25,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:53:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-06 18:53:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:53:25,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:25,173 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:25,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:25,377 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash -600111765, now seen corresponding path program 2 times [2019-11-06 18:53:25,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:25,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974498281] [2019-11-06 18:53:25,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:25,398 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:25,399 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385350077] [2019-11-06 18:53:25,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:53:25,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:53:25,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:25,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:53:25,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:25,523 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2019-11-06 18:53:25,524 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,602 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-11-06 18:53:25,603 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-11-06 18:53:25,603 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,603 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-06 18:53:25,718 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:53:25,719 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-06 18:53:25,722 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,727 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:25,728 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,728 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-06 18:53:25,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:25,782 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:25,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,839 INFO L341 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2019-11-06 18:53:25,840 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2019-11-06 18:53:25,842 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,862 INFO L567 ElimStorePlain]: treesize reduction 32, result has 17.9 percent of original size [2019-11-06 18:53:25,863 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,863 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2019-11-06 18:53:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:25,908 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974498281] [2019-11-06 18:53:25,908 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:25,908 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385350077] [2019-11-06 18:53:25,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:25,909 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 18:53:25,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758975501] [2019-11-06 18:53:25,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:53:25,910 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:53:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:53:25,910 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-06 18:53:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:26,711 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2019-11-06 18:53:26,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:53:26,712 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-06 18:53:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:26,715 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:53:26,715 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:53:26,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:53:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:53:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-11-06 18:53:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:53:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-06 18:53:26,731 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2019-11-06 18:53:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:26,731 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-06 18:53:26,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:53:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-06 18:53:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:53:26,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:26,732 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:26,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:26,938 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1240494935, now seen corresponding path program 3 times [2019-11-06 18:53:26,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:26,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546690334] [2019-11-06 18:53:26,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:26,959 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:26,959 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19783019] [2019-11-06 18:53:26,959 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:53:27,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:53:27,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:27,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:53:27,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:27,044 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2019-11-06 18:53:27,044 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,114 INFO L567 ElimStorePlain]: treesize reduction 39, result has 36.1 percent of original size [2019-11-06 18:53:27,115 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-11-06 18:53:27,115 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,115 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:22 [2019-11-06 18:53:27,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:27,204 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:27,210 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2019-11-06 18:53:27,212 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,217 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:27,218 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,241 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2019-11-06 18:53:27,241 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,241 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:107, output treesize:43 [2019-11-06 18:53:27,281 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:27,283 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:27,284 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:27,285 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:27,285 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2019-11-06 18:53:27,286 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,298 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:27,299 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,299 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-06 18:53:27,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:27,345 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:27,345 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,349 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:27,350 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:27,352 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:27,352 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 24 [2019-11-06 18:53:27,353 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,361 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-11-06 18:53:27,361 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,362 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:86, output treesize:7 [2019-11-06 18:53:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:27,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546690334] [2019-11-06 18:53:27,408 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:27,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19783019] [2019-11-06 18:53:27,408 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:27,408 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 18:53:27,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948022973] [2019-11-06 18:53:27,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:53:27,409 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:53:27,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:53:27,410 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2019-11-06 18:53:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:28,136 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2019-11-06 18:53:28,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:53:28,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-06 18:53:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:28,139 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:53:28,139 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:53:28,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:53:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:53:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2019-11-06 18:53:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:53:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-11-06 18:53:28,148 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 20 [2019-11-06 18:53:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:28,149 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-11-06 18:53:28,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:53:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-11-06 18:53:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:53:28,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:28,150 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:28,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:28,352 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:28,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1826569319, now seen corresponding path program 4 times [2019-11-06 18:53:28,353 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:28,353 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492035880] [2019-11-06 18:53:28,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:28,363 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:28,363 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483205635] [2019-11-06 18:53:28,363 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:53:28,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:53:28,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:28,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:53:28,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:28,447 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2019-11-06 18:53:28,448 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,726 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-11-06 18:53:28,726 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-11-06 18:53:28,726 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-06 18:53:28,726 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,727 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-06 18:53:28,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:28,806 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:28,807 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,825 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:28,826 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 64 [2019-11-06 18:53:28,827 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,866 INFO L567 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2019-11-06 18:53:28,867 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,867 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:73, output treesize:26 [2019-11-06 18:53:28,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:28,909 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:28,910 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:28,912 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:28,922 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 58 [2019-11-06 18:53:28,923 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,927 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:28,927 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,950 INFO L567 ElimStorePlain]: treesize reduction 5, result has 90.4 percent of original size [2019-11-06 18:53:28,951 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,951 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:115, output treesize:47 [2019-11-06 18:53:29,038 INFO L341 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2019-11-06 18:53:29,038 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2019-11-06 18:53:29,039 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:29,048 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:29,049 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:29,049 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2019-11-06 18:53:29,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:29,108 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:29,109 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:29,115 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:29,116 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:29,117 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:29,118 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:29,119 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:29,119 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:29,125 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2019-11-06 18:53:29,126 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:29,139 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:29,139 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:29,147 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-11-06 18:53:29,147 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:29,148 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2019-11-06 18:53:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:29,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492035880] [2019-11-06 18:53:29,193 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:29,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483205635] [2019-11-06 18:53:29,193 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:29,193 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 18:53:29,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475932694] [2019-11-06 18:53:29,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:53:29,194 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:53:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:53:29,195 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 14 states. [2019-11-06 18:53:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:30,174 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2019-11-06 18:53:30,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:53:30,175 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-11-06 18:53:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:30,177 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:53:30,177 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:53:30,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:53:30,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:53:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 36. [2019-11-06 18:53:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:53:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-06 18:53:30,187 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2019-11-06 18:53:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:30,187 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-06 18:53:30,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:53:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-06 18:53:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:53:30,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:30,188 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:30,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:30,389 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:30,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1367214939, now seen corresponding path program 5 times [2019-11-06 18:53:30,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:30,390 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45768613] [2019-11-06 18:53:30,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:30,403 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:30,403 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744979212] [2019-11-06 18:53:30,403 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-11-06 18:53:45,195 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:53:45,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:45,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:53:45,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:45,210 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2019-11-06 18:53:45,211 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,305 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-11-06 18:53:45,305 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-06 18:53:45,305 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,305 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-06 18:53:45,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:45,387 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:45,387 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,403 INFO L341 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2019-11-06 18:53:45,404 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2019-11-06 18:53:45,405 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,424 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-11-06 18:53:45,425 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,425 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-11-06 18:53:45,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:45,470 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:45,471 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,523 INFO L341 Elim1Store]: treesize reduction 132, result has 19.0 percent of original size [2019-11-06 18:53:45,523 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 72 [2019-11-06 18:53:45,524 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,555 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.4 percent of original size [2019-11-06 18:53:45,556 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,557 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:143, output treesize:61 [2019-11-06 18:53:45,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:45,623 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:45,624 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:45,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:45,627 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:45,628 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:45,629 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:45,642 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 58 [2019-11-06 18:53:45,643 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,646 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:45,646 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,666 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.8 percent of original size [2019-11-06 18:53:45,666 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,667 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:109, output treesize:44 [2019-11-06 18:53:45,762 INFO L341 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2019-11-06 18:53:45,763 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2019-11-06 18:53:45,764 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,787 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:45,787 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,787 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2019-11-06 18:53:45,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:45,852 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:45,852 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,931 INFO L341 Elim1Store]: treesize reduction 112, result has 41.4 percent of original size [2019-11-06 18:53:45,931 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 105 [2019-11-06 18:53:45,933 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,946 INFO L567 ElimStorePlain]: treesize reduction 80, result has 8.0 percent of original size [2019-11-06 18:53:45,946 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:45,947 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:133, output treesize:7 [2019-11-06 18:53:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:45,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45768613] [2019-11-06 18:53:45,999 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:45,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744979212] [2019-11-06 18:53:45,999 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:45,999 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-06 18:53:45,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343613119] [2019-11-06 18:53:46,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:53:46,000 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:46,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:53:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:53:46,001 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 16 states. [2019-11-06 18:53:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:49,368 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2019-11-06 18:53:49,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:53:49,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-11-06 18:53:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:49,372 INFO L225 Difference]: With dead ends: 81 [2019-11-06 18:53:49,372 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:53:49,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:53:49,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:53:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 38. [2019-11-06 18:53:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:53:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-11-06 18:53:49,382 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2019-11-06 18:53:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:49,382 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-11-06 18:53:49,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:53:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-11-06 18:53:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:53:49,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:49,384 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:49,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:49,587 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash 876156287, now seen corresponding path program 1 times [2019-11-06 18:53:49,588 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:49,588 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910489966] [2019-11-06 18:53:49,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:49,597 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:49,598 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7046793] [2019-11-06 18:53:49,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:53:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:49,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:53:49,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:49,662 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-06 18:53:49,662 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,670 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:49,670 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,670 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2019-11-06 18:53:49,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:49,784 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:49,785 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:49,786 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-11-06 18:53:49,786 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,794 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:49,794 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,802 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-11-06 18:53:49,803 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,803 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:7 [2019-11-06 18:53:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:49,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910489966] [2019-11-06 18:53:49,838 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:49,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7046793] [2019-11-06 18:53:49,838 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:49,839 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-06 18:53:49,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089141213] [2019-11-06 18:53:49,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:53:49,839 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:49,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:53:49,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:53:49,840 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 13 states. [2019-11-06 18:53:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:50,091 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2019-11-06 18:53:50,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:53:50,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2019-11-06 18:53:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:50,095 INFO L225 Difference]: With dead ends: 75 [2019-11-06 18:53:50,095 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:53:50,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:53:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:53:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2019-11-06 18:53:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:53:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-11-06 18:53:50,104 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2019-11-06 18:53:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:50,104 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-11-06 18:53:50,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:53:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-11-06 18:53:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:53:50,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:50,106 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:50,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:50,316 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:50,316 INFO L82 PathProgramCache]: Analyzing trace with hash 307729763, now seen corresponding path program 6 times [2019-11-06 18:53:50,316 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:50,316 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971753285] [2019-11-06 18:53:50,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:50,324 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:50,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752009639] [2019-11-06 18:53:50,325 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:53:51,496 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:53:51,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:51,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-06 18:53:51,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:51,542 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2019-11-06 18:53:51,542 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:51,834 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-11-06 18:53:51,835 INFO L567 ElimStorePlain]: treesize reduction 45, result has 38.4 percent of original size [2019-11-06 18:53:51,835 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_21| vanished before elimination [2019-11-06 18:53:51,835 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:51,835 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:28 [2019-11-06 18:53:52,035 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-06 18:53:52,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:52,055 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:52,055 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,058 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,059 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2019-11-06 18:53:52,060 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,086 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-11-06 18:53:52,087 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,087 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:35 [2019-11-06 18:53:52,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:52,133 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,134 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,135 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,144 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 55 [2019-11-06 18:53:52,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,147 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:52,148 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,179 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.8 percent of original size [2019-11-06 18:53:52,180 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,180 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:109, output treesize:44 [2019-11-06 18:53:52,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:52,298 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,299 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,300 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,301 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,302 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,303 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,317 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 79 [2019-11-06 18:53:52,318 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,322 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:52,322 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,370 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.9 percent of original size [2019-11-06 18:53:52,371 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,371 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:151, output treesize:65 [2019-11-06 18:53:52,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:52,462 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:52,463 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,465 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,466 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,467 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,468 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,469 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,470 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,471 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,473 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,474 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,483 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,484 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:52,485 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 103 [2019-11-06 18:53:52,486 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,542 INFO L567 ElimStorePlain]: treesize reduction 5, result has 94.5 percent of original size [2019-11-06 18:53:52,542 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,543 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:193, output treesize:86 [2019-11-06 18:53:52,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:52,641 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:52,641 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,644 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,645 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,646 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,650 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,653 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,654 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,655 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,656 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,656 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,657 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,658 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,659 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,660 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,661 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,662 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,663 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:52,664 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 94 [2019-11-06 18:53:52,665 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,714 INFO L567 ElimStorePlain]: treesize reduction 8, result has 89.9 percent of original size [2019-11-06 18:53:52,714 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,714 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:169, output treesize:71 [2019-11-06 18:53:52,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:52,911 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:52,911 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,914 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,916 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,917 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:52,918 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:52,920 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:52,920 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 62 treesize of output 33 [2019-11-06 18:53:52,921 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,930 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-11-06 18:53:52,931 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:52,931 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:7 [2019-11-06 18:53:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:52,991 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971753285] [2019-11-06 18:53:52,992 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:52,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752009639] [2019-11-06 18:53:52,992 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:52,992 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-06 18:53:52,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838444625] [2019-11-06 18:53:52,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:53:52,993 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:52,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:53:52,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:53:52,993 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 22 states. [2019-11-06 18:53:53,343 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-11-06 18:53:53,947 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-06 18:53:55,405 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-11-06 18:53:55,700 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2019-11-06 18:53:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:56,609 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2019-11-06 18:53:56,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:53:56,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-11-06 18:53:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:56,611 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:53:56,612 INFO L226 Difference]: Without dead ends: 100 [2019-11-06 18:53:56,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2019-11-06 18:53:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-06 18:53:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 49. [2019-11-06 18:53:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:53:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-11-06 18:53:56,624 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 26 [2019-11-06 18:53:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:56,625 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-11-06 18:53:56,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:53:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-11-06 18:53:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:53:56,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:56,626 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:56,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:56,831 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash -114721091, now seen corresponding path program 2 times [2019-11-06 18:53:56,832 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:56,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916688587] [2019-11-06 18:53:56,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:56,840 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:56,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767688520] [2019-11-06 18:53:56,841 INFO L92 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 [2019-11-06 18:53:56,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:53:56,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:56,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:53:56,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:56,916 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:56,917 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:56,928 INFO L567 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-11-06 18:53:56,931 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-06 18:53:56,932 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:56,936 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:56,937 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:56,937 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-06 18:53:56,969 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:53:56,971 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2019-11-06 18:53:56,971 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:56,989 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:56,989 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:56,989 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-06 18:53:57,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:57,104 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:57,105 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:57,123 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:57,124 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2019-11-06 18:53:57,125 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:57,127 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:57,128 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:57,135 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-11-06 18:53:57,136 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:57,136 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:7 [2019-11-06 18:53:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:57,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916688587] [2019-11-06 18:53:57,176 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:57,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767688520] [2019-11-06 18:53:57,176 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:57,176 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-06 18:53:57,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181554081] [2019-11-06 18:53:57,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:53:57,177 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:53:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:53:57,177 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 15 states. [2019-11-06 18:53:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:57,628 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2019-11-06 18:53:57,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:53:57,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-11-06 18:53:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:57,630 INFO L225 Difference]: With dead ends: 92 [2019-11-06 18:53:57,630 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:53:57,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:53:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:53:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2019-11-06 18:53:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:53:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-11-06 18:53:57,641 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 28 [2019-11-06 18:53:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:57,641 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-11-06 18:53:57,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:53:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-11-06 18:53:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:53:57,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:57,642 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:57,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:57,851 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:57,852 INFO L82 PathProgramCache]: Analyzing trace with hash -683147615, now seen corresponding path program 7 times [2019-11-06 18:53:57,852 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:57,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133804911] [2019-11-06 18:53:57,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:57,859 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:57,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821999245] [2019-11-06 18:53:57,859 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:58,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:53:58,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:58,126 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:58,126 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,225 INFO L567 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-11-06 18:53:58,227 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-06 18:53:58,227 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,258 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:58,258 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,259 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-06 18:53:58,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:58,312 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:58,312 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,330 INFO L341 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2019-11-06 18:53:58,330 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2019-11-06 18:53:58,331 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,348 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-11-06 18:53:58,349 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,349 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-11-06 18:53:58,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:58,391 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,392 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,393 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,400 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2019-11-06 18:53:58,401 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,403 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:58,403 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,421 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-11-06 18:53:58,422 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,422 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:35 [2019-11-06 18:53:58,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:58,463 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,463 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,464 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,465 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,466 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,467 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,483 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 70 [2019-11-06 18:53:58,484 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,486 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:58,487 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,512 INFO L567 ElimStorePlain]: treesize reduction 5, result has 91.8 percent of original size [2019-11-06 18:53:58,513 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,513 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:133, output treesize:56 [2019-11-06 18:53:58,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:58,567 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:58,567 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,711 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2019-11-06 18:53:58,711 INFO L341 Elim1Store]: treesize reduction 66, result has 72.4 percent of original size [2019-11-06 18:53:58,712 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 208 [2019-11-06 18:53:58,713 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,770 INFO L567 ElimStorePlain]: treesize reduction 143, result has 27.0 percent of original size [2019-11-06 18:53:58,770 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,770 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:127, output treesize:53 [2019-11-06 18:53:58,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:58,844 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,845 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,846 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,848 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,849 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,849 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,850 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,851 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,852 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,852 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,853 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,854 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,855 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,856 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,857 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:58,879 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 82 [2019-11-06 18:53:58,879 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,883 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:58,883 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,909 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.5 percent of original size [2019-11-06 18:53:58,910 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:58,910 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:145, output treesize:62 [2019-11-06 18:53:59,076 INFO L341 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2019-11-06 18:53:59,076 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2019-11-06 18:53:59,078 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:59,096 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:59,096 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:59,096 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2019-11-06 18:53:59,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:59,192 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:59,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:59,317 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 55 [2019-11-06 18:53:59,317 INFO L341 Elim1Store]: treesize reduction 240, result has 31.6 percent of original size [2019-11-06 18:53:59,318 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 143 [2019-11-06 18:53:59,319 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:59,340 INFO L567 ElimStorePlain]: treesize reduction 112, result has 5.9 percent of original size [2019-11-06 18:53:59,341 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:59,341 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:169, output treesize:7 [2019-11-06 18:53:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:59,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133804911] [2019-11-06 18:53:59,411 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:59,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821999245] [2019-11-06 18:53:59,411 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:59,411 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-06 18:53:59,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6985885] [2019-11-06 18:53:59,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:53:59,412 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:53:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:53:59,412 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 20 states. [2019-11-06 18:54:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:03,232 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2019-11-06 18:54:03,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:54:03,233 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2019-11-06 18:54:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:03,235 INFO L225 Difference]: With dead ends: 109 [2019-11-06 18:54:03,235 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:54:03,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:54:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:54:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 51. [2019-11-06 18:54:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:54:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-11-06 18:54:03,246 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2019-11-06 18:54:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:03,247 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-11-06 18:54:03,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:54:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-11-06 18:54:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:54:03,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:03,248 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:03,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:03,452 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:03,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:03,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1134858363, now seen corresponding path program 3 times [2019-11-06 18:54:03,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:03,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437080569] [2019-11-06 18:54:03,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:03,460 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:54:03,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907215388] [2019-11-06 18:54:03,460 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:05,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 18:54:05,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:54:05,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 18:54:05,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:54:05,588 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2019-11-06 18:54:05,589 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:05,617 INFO L567 ElimStorePlain]: treesize reduction 42, result has 37.3 percent of original size [2019-11-06 18:54:05,618 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_36| vanished before elimination [2019-11-06 18:54:05,618 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:05,618 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:25 [2019-11-06 18:54:05,661 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:54:05,662 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2019-11-06 18:54:05,662 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:05,671 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:05,671 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:05,672 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-06 18:54:05,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:05,695 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:05,696 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:05,697 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:05,711 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 56 [2019-11-06 18:54:05,712 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:05,716 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:05,753 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:05,754 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 126 [2019-11-06 18:54:05,755 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:05,989 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-11-06 18:54:05,990 INFO L567 ElimStorePlain]: treesize reduction 48, result has 71.9 percent of original size [2019-11-06 18:54:05,990 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-06 18:54:05,991 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:107, output treesize:123 [2019-11-06 18:54:06,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:06,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:06,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:06,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:09,089 WARN L191 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2019-11-06 18:54:09,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:54:09,511 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int| c_main_~a~0.base))) (and (exists ((v_main_~i~0_44 Int) (v_main_~a~0.offset_BEFORE_CALL_3 Int) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (let ((.cse0 (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_3)) (.cse1 (mod v_main_~i~0_44 4294967296))) (and (<= v_main_~i~0_44 99998) (= (select .cse0 (+ (* .cse1 8) v_main_~a~0.offset_BEFORE_CALL_3)) (* v_main_~i~0_44 v_main_~i~0_44)) (= 4 (select .cse0 (+ v_main_~a~0.offset_BEFORE_CALL_3 16))) (= (* 8 .cse1) 8) (<= .cse1 2147483647) (<= 1 v_main_~i~0_44)))) (exists ((v_prenex_11 Int)) (let ((.cse2 (mod v_prenex_11 4294967296))) (and (= (* 8 .cse2) 8) (= (* v_prenex_11 v_prenex_11) (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* .cse2 8)))) (<= v_prenex_11 99998) (<= 1 v_prenex_11) (<= .cse2 2147483647)))) (= (select .cse3 (+ c_main_~a~0.offset 16)) 4) (= (* c_main_~i~0 c_main_~i~0) (select .cse3 (+ (* (mod c_main_~i~0 4294967296) 8) c_main_~a~0.offset))) (= c_main_~i~0 0))) is different from true [2019-11-06 18:54:09,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:09,629 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:54:09,631 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:09,632 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:09,633 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:09,634 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:54:09,640 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 47 [2019-11-06 18:54:09,641 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:09,671 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:54:09,671 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:09,741 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-06 18:54:09,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:54:09,742 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:173, output treesize:22 [2019-11-06 18:54:09,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:09,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437080569] [2019-11-06 18:54:09,851 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:54:09,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907215388] [2019-11-06 18:54:09,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:54:09,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-06 18:54:09,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420357617] [2019-11-06 18:54:09,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:54:09,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:54:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=367, Unknown=2, NotChecked=38, Total=462 [2019-11-06 18:54:09,853 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 22 states. [2019-11-06 18:54:13,115 WARN L191 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 71 DAG size of output: 46