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/nla-digbench/ps5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:39,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:39,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:39,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:39,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:39,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:39,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:39,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:39,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:39,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:39,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:39,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:39,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:39,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:39,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:39,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:39,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:39,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:39,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:39,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:39,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:39,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:39,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:39,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:39,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:39,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:39,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:39,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:39,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:39,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:39,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:39,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:39,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:39,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:39,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:39,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:39,206 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 [2019-10-14 23:17:39,234 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:39,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:39,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:39,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:39,238 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:39,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:39,239 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:39,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:39,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:39,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:39,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:39,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:39,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:39,241 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:39,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:39,242 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:39,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:39,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:39,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:39,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:39,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:39,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:39,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:39,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:39,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:39,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:39,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:39,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:39,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:39,554 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:39,566 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:39,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:39,571 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:39,571 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:39,572 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5.c [2019-10-14 23:17:39,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0198336b4/bd7757cee74043d181f64b488a756856/FLAGf0eeb8760 [2019-10-14 23:17:40,087 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:40,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5.c [2019-10-14 23:17:40,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0198336b4/bd7757cee74043d181f64b488a756856/FLAGf0eeb8760 [2019-10-14 23:17:40,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0198336b4/bd7757cee74043d181f64b488a756856 [2019-10-14 23:17:40,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:40,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:40,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:40,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:40,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:40,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea19e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40, skipping insertion in model container [2019-10-14 23:17:40,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,543 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:40,563 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:40,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:40,756 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:40,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:40,790 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:40,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40 WrapperNode [2019-10-14 23:17:40,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:40,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:40,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:40,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:40,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (1/1) ... [2019-10-14 23:17:40,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:40,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:40,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:40,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:40,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (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 [2019-10-14 23:17:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:40,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:41,134 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:41,134 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:41,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:41 BoogieIcfgContainer [2019-10-14 23:17:41,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:41,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:41,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:41,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:41,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:40" (1/3) ... [2019-10-14 23:17:41,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726ff5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:41, skipping insertion in model container [2019-10-14 23:17:41,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:40" (2/3) ... [2019-10-14 23:17:41,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726ff5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:41, skipping insertion in model container [2019-10-14 23:17:41,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:41" (3/3) ... [2019-10-14 23:17:41,155 INFO L109 eAbstractionObserver]: Analyzing ICFG ps5.c [2019-10-14 23:17:41,171 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:41,180 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:41,194 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:41,228 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:41,228 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:41,229 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:41,229 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:41,229 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:41,229 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:41,229 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:41,229 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:17:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:41,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:41,255 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:41,256 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:41,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:41,262 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-10-14 23:17:41,268 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:41,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715405394] [2019-10-14 23:17:41,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:41,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715405394] [2019-10-14 23:17:41,363 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:41,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:41,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143224834] [2019-10-14 23:17:41,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:41,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:41,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:41,382 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-14 23:17:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:41,405 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-10-14 23:17:41,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:41,406 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:41,414 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:41,415 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:17:41,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:17:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:17:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:17:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:17:41,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-14 23:17:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:41,453 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:17:41,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:17:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:41,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:41,458 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:41,458 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-10-14 23:17:41,459 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:41,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686714751] [2019-10-14 23:17:41,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:41,467 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:41,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964689487] [2019-10-14 23:17:41,468 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 [2019-10-14 23:17:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:41,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:17:41,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:41,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686714751] [2019-10-14 23:17:41,582 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:41,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964689487] [2019-10-14 23:17:41,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:41,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:41,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314267560] [2019-10-14 23:17:41,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:41,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:41,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:41,589 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-14 23:17:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:41,790 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-14 23:17:41,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:41,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:41,794 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:17:41,794 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:17:41,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:17:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:17:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:17:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:17:41,813 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-10-14 23:17:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:41,813 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:17:41,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:17:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:17:41,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:41,817 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:42,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:42,024 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:42,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-10-14 23:17:42,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:42,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652604377] [2019-10-14 23:17:42,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:42,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:42,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:42,031 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:42,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963901795] [2019-10-14 23:17:42,032 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 [2019-10-14 23:17:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:42,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:42,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:42,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652604377] [2019-10-14 23:17:42,241 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:42,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963901795] [2019-10-14 23:17:42,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:42,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:42,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690584364] [2019-10-14 23:17:42,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:42,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:42,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:42,244 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-10-14 23:17:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:42,697 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 23:17:42,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:42,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-14 23:17:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:42,699 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:17:42,699 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:17:42,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:17:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:17:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:17:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 23:17:42,708 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-10-14 23:17:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:42,709 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 23:17:42,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 23:17:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:17:42,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:42,710 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:42,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:42,915 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-10-14 23:17:42,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:42,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221635071] [2019-10-14 23:17:42,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:42,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:42,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:42,921 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:42,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141368796] [2019-10-14 23:17:42,922 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 [2019-10-14 23:17:42,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:42,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:42,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:42,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:43,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221635071] [2019-10-14 23:17:43,102 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:43,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141368796] [2019-10-14 23:17:43,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:43,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:43,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019672599] [2019-10-14 23:17:43,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:43,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:43,104 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-10-14 23:17:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:43,588 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-10-14 23:17:43,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:43,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 23:17:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:43,591 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:17:43,591 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:17:43,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:17:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 23:17:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:17:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 23:17:43,601 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-10-14 23:17:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:43,602 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 23:17:43,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 23:17:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:43,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:43,604 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:43,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:43,806 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:43,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-10-14 23:17:43,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:43,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850745442] [2019-10-14 23:17:43,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:43,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:43,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:43,813 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:43,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22623387] [2019-10-14 23:17:43,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:17:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:43,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 23:17:43,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:45,926 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~y~0 0) (= 0 (mod (+ (* (* (* (* c_main_~y~0 10) c_main_~y~0) c_main_~y~0) 29) c_main_~y~0 (* (* (* (* (* c_main_~y~0 15) c_main_~y~0) c_main_~y~0) c_main_~y~0) 29) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 29)) (- 30))) (= c_main_~c~0 0)) is different from true [2019-10-14 23:17:47,967 WARN L860 $PredicateComparison]: unable to prove that (and (<= c_main_~c~0 1) (= c_main_~y~0 1) (= (mod (let ((.cse0 (+ c_main_~y~0 (- 1)))) (+ (* (* (* (* (* (+ (* c_main_~y~0 6) (- 6)) .cse0) .cse0) .cse0) .cse0) 29) c_main_~y~0 (* (* (* (* (+ (* c_main_~y~0 15) (- 15)) .cse0) .cse0) .cse0) 29) (* (* (* (+ (* c_main_~y~0 10) (- 10)) .cse0) .cse0) 29) 29)) (- 30)) 0) (< 0 c_main_~k~0)) is different from true [2019-10-14 23:17:52,023 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 39 DAG size of output: 8 [2019-10-14 23:17:52,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2019-10-14 23:17:52,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850745442] [2019-10-14 23:17:52,068 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:52,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22623387] [2019-10-14 23:17:52,069 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:52,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:52,069 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058898333] [2019-10-14 23:17:52,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:52,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=43, Unknown=3, NotChecked=26, Total=90 [2019-10-14 23:17:52,070 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2019-10-14 23:17:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:52,168 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-14 23:17:52,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:52,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-14 23:17:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:52,171 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:17:52,171 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:17:52,172 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=29, Invalid=66, Unknown=3, NotChecked=34, Total=132 [2019-10-14 23:17:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:17:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:17:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:17:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-14 23:17:52,180 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-10-14 23:17:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:52,181 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-14 23:17:52,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-14 23:17:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:17:52,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:52,182 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:52,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:52,395 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-10-14 23:17:52,396 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:52,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121623840] [2019-10-14 23:17:52,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:52,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:52,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:52,403 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:52,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490979302] [2019-10-14 23:17:52,403 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 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 [2019-10-14 23:17:52,444 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:52,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:52,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:52,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:53,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:17:53,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121623840] [2019-10-14 23:17:53,481 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:53,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490979302] [2019-10-14 23:17:53,481 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:53,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:53,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271452529] [2019-10-14 23:17:53,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:53,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:53,483 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2019-10-14 23:17:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:53,613 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-10-14 23:17:53,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:53,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 23:17:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:53,615 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:17:53,615 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:17:53,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:17:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-10-14 23:17:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:17:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-14 23:17:53,623 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2019-10-14 23:17:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:53,624 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-14 23:17:53,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-14 23:17:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:17:53,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:53,625 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:53,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:53,829 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-10-14 23:17:53,830 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:53,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931961807] [2019-10-14 23:17:53,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:53,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:53,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:53,836 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:53,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009097907] [2019-10-14 23:17:53,837 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 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 [2019-10-14 23:17:53,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:53,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:53,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:53,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:53,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:17:53,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931961807] [2019-10-14 23:17:53,995 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:53,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009097907] [2019-10-14 23:17:53,996 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:53,996 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:53,996 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861830705] [2019-10-14 23:17:53,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:53,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:53,998 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 10 states. [2019-10-14 23:17:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:54,168 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-10-14 23:17:54,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:54,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-10-14 23:17:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:54,170 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:17:54,170 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:17:54,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:17:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 23:17:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:17:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 23:17:54,177 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 35 [2019-10-14 23:17:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:54,178 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 23:17:54,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 23:17:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:17:54,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:54,179 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:54,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:54,381 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-10-14 23:17:54,382 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:54,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582464446] [2019-10-14 23:17:54,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:54,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:54,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:54,389 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:54,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068588244] [2019-10-14 23:17:54,390 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 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 [2019-10-14 23:17:54,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:17:54,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:54,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:17:54,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:54,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 23:17:54,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582464446] [2019-10-14 23:17:54,599 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:54,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068588244] [2019-10-14 23:17:54,599 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:54,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:17:54,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939423176] [2019-10-14 23:17:54,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:17:54,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:17:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:54,601 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2019-10-14 23:17:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:54,805 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-10-14 23:17:54,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:17:54,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-10-14 23:17:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:54,808 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:17:54,809 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:17:54,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:17:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:17:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:17:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:17:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-10-14 23:17:54,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 42 [2019-10-14 23:17:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:54,817 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-10-14 23:17:54,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:17:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-10-14 23:17:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:17:54,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:54,819 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:55,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:55,023 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:55,023 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-10-14 23:17:55,023 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:55,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248721631] [2019-10-14 23:17:55,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:55,036 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:55,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315579381] [2019-10-14 23:17:55,036 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 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 [2019-10-14 23:17:55,069 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:55,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:55,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 23:17:55,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:55,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 23:17:55,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248721631] [2019-10-14 23:17:55,192 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:55,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315579381] [2019-10-14 23:17:55,193 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:55,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:17:55,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128454241] [2019-10-14 23:17:55,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:17:55,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:17:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:55,195 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-10-14 23:17:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:55,394 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-14 23:17:55,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:17:55,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-10-14 23:17:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:55,395 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:17:55,395 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:17:55,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:17:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:17:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 23:17:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:17:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 23:17:55,403 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 49 [2019-10-14 23:17:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:55,404 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 23:17:55,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:17:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 23:17:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:17:55,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:55,406 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:55,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:55,609 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-10-14 23:17:55,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:55,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074840826] [2019-10-14 23:17:55,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:55,616 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:55,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120252947] [2019-10-14 23:17:55,617 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 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 [2019-10-14 23:18:24,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:18:24,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:24,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 23:18:24,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:24,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 23:18:24,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074840826] [2019-10-14 23:18:24,759 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:24,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120252947] [2019-10-14 23:18:24,759 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:24,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:18:24,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920500672] [2019-10-14 23:18:24,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:18:24,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:24,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:18:24,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:18:24,761 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2019-10-14 23:18:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:24,993 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-10-14 23:18:24,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:18:24,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-10-14 23:18:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:24,994 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:18:24,995 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:18:24,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:18:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:18:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 23:18:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:18:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-10-14 23:18:25,005 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 56 [2019-10-14 23:18:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:25,005 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-10-14 23:18:25,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:18:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-10-14 23:18:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 23:18:25,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:25,007 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:25,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:25,217 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:25,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-10-14 23:18:25,218 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:25,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270329883] [2019-10-14 23:18:25,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:25,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:25,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:25,225 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:25,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050410389] [2019-10-14 23:18:25,226 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 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