/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:44:30,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:44:30,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:44:30,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:44:30,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:44:30,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:44:30,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:44:30,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:44:30,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:44:30,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:44:30,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:44:30,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:44:30,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:44:30,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:44:30,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:44:30,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:44:30,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:44:30,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:44:30,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:44:30,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:44:30,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:44:30,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:44:30,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:44:30,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:44:30,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:44:30,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:44:30,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:44:30,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:44:30,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:44:30,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:44:30,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:44:30,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:44:30,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:44:30,167 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:44:30,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:44:30,168 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:44:30,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:44:30,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:44:30,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:44:30,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:44:30,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:44:30,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:44:30,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:44:30,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:44:30,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:44:30,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:44:30,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:44:30,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:44:30,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:44:30,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:44:30,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:44:30,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:44:30,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:44:30,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:44:30,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:44:30,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:44:30,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:44:30,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:44:30,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:44:30,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:44:30,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:44:30,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:44:30,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:44:30,491 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:44:30,492 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-19 21:44:30,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61a7dfcd/aee6641dac564bb4bc64901043f588e8/FLAG583a396a2 [2020-07-19 21:44:31,102 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:44:31,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-19 21:44:31,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61a7dfcd/aee6641dac564bb4bc64901043f588e8/FLAG583a396a2 [2020-07-19 21:44:31,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61a7dfcd/aee6641dac564bb4bc64901043f588e8 [2020-07-19 21:44:31,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:44:31,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:44:31,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:31,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:44:31,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:44:31,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447d7cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31, skipping insertion in model container [2020-07-19 21:44:31,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:44:31,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:44:31,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:31,718 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:44:31,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:31,765 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:44:31,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31 WrapperNode [2020-07-19 21:44:31,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:31,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:44:31,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:44:31,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:44:31,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... [2020-07-19 21:44:31,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:44:31,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:44:31,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:44:31,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:44:31,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:44:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:44:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:44:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-19 21:44:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-19 21:44:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:44:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:44:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:44:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-19 21:44:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:44:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-19 21:44:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:44:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:44:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:44:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:44:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:44:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:44:32,419 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:44:32,420 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 21:44:32,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:32 BoogieIcfgContainer [2020-07-19 21:44:32,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:44:32,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:44:32,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:44:32,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:44:32,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:44:31" (1/3) ... [2020-07-19 21:44:32,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e6fbf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:32, skipping insertion in model container [2020-07-19 21:44:32,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:31" (2/3) ... [2020-07-19 21:44:32,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e6fbf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:32, skipping insertion in model container [2020-07-19 21:44:32,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:32" (3/3) ... [2020-07-19 21:44:32,435 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-19 21:44:32,448 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:44:32,458 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:44:32,475 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:44:32,499 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:44:32,500 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:44:32,500 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:44:32,500 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:44:32,500 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:44:32,500 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:44:32,500 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:44:32,501 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:44:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-19 21:44:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 21:44:32,528 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:32,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:32,530 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:32,536 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-19 21:44:32,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:32,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502221881] [2020-07-19 21:44:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502221881] [2020-07-19 21:44:32,693 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-19 21:44:32,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704359887] [2020-07-19 21:44:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-19 21:44:32,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-19 21:44:32,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:32,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 21:44:32,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89779537] [2020-07-19 21:44:32,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 21:44:32,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:32,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 21:44:32,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:44:32,888 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-07-19 21:44:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:32,915 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-07-19 21:44:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 21:44:32,917 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-07-19 21:44:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:32,926 INFO L225 Difference]: With dead ends: 64 [2020-07-19 21:44:32,926 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 21:44:32,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:44:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 21:44:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-19 21:44:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-19 21:44:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-19 21:44:32,968 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2020-07-19 21:44:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:32,969 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-19 21:44:32,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 21:44:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-19 21:44:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 21:44:32,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:32,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:33,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-19 21:44:33,180 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:33,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2020-07-19 21:44:33,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:33,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064010217] [2020-07-19 21:44:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:33,212 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:33,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478095129] [2020-07-19 21:44:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 21:44:33,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064010217] [2020-07-19 21:44:33,334 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:33,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478095129] [2020-07-19 21:44:33,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:33,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:44:33,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326651988] [2020-07-19 21:44:33,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:33,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:33,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:33,338 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2020-07-19 21:44:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:33,368 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-07-19 21:44:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:33,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-19 21:44:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:33,371 INFO L225 Difference]: With dead ends: 56 [2020-07-19 21:44:33,372 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 21:44:33,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 21:44:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-19 21:44:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:44:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-19 21:44:33,396 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2020-07-19 21:44:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:33,397 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-19 21:44:33,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-19 21:44:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-19 21:44:33,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:33,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:33,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:33,618 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2020-07-19 21:44:33,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:33,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16672] [2020-07-19 21:44:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:33,652 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:33,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762728727] [2020-07-19 21:44:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:33,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-19 21:44:33,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16672] [2020-07-19 21:44:33,776 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:33,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762728727] [2020-07-19 21:44:33,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:33,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:44:33,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377298598] [2020-07-19 21:44:33,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:33,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:33,782 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-19 21:44:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:33,820 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2020-07-19 21:44:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:33,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-19 21:44:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:33,823 INFO L225 Difference]: With dead ends: 54 [2020-07-19 21:44:33,825 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:44:33,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:44:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-19 21:44:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 21:44:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-19 21:44:33,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2020-07-19 21:44:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:33,847 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-19 21:44:33,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-19 21:44:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 21:44:33,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:33,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,062 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1719401286, now seen corresponding path program 1 times [2020-07-19 21:44:34,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465872843] [2020-07-19 21:44:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:34,106 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:34,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422334076] [2020-07-19 21:44:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-19 21:44:34,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465872843] [2020-07-19 21:44:34,205 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:34,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422334076] [2020-07-19 21:44:34,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:34,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:44:34,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983141952] [2020-07-19 21:44:34,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:34,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:34,208 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-07-19 21:44:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:34,239 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-07-19 21:44:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:34,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-19 21:44:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:34,245 INFO L225 Difference]: With dead ends: 52 [2020-07-19 21:44:34,245 INFO L226 Difference]: Without dead ends: 37 [2020-07-19 21:44:34,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-19 21:44:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-07-19 21:44:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 21:44:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-07-19 21:44:34,256 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2020-07-19 21:44:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:34,262 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-07-19 21:44:34,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-07-19 21:44:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 21:44:34,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:34,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,479 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash 494084840, now seen corresponding path program 1 times [2020-07-19 21:44:34,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988965924] [2020-07-19 21:44:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:34,519 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:34,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392156035] [2020-07-19 21:44:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:44:34,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-19 21:44:34,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988965924] [2020-07-19 21:44:34,626 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:34,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392156035] [2020-07-19 21:44:34,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:34,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:44:34,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407816100] [2020-07-19 21:44:34,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:34,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:34,629 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 3 states. [2020-07-19 21:44:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:34,750 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-07-19 21:44:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:34,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-07-19 21:44:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:34,755 INFO L225 Difference]: With dead ends: 63 [2020-07-19 21:44:34,755 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:44:34,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:44:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-19 21:44:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-19 21:44:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-19 21:44:34,766 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 50 [2020-07-19 21:44:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:34,767 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-19 21:44:34,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-19 21:44:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 21:44:34,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:34,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,972 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2020-07-19 21:44:34,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432883119] [2020-07-19 21:44:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 21:44:35,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432883119] [2020-07-19 21:44:35,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145014372] [2020-07-19 21:44:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:44:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-19 21:44:35,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:35,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 8 [2020-07-19 21:44:35,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315474002] [2020-07-19 21:44:35,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:44:35,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:44:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:35,234 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 8 states. [2020-07-19 21:44:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:35,495 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-19 21:44:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:44:35,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-19 21:44:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:35,497 INFO L225 Difference]: With dead ends: 76 [2020-07-19 21:44:35,497 INFO L226 Difference]: Without dead ends: 47 [2020-07-19 21:44:35,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:44:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-19 21:44:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-07-19 21:44:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:44:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-19 21:44:35,506 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 50 [2020-07-19 21:44:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:35,507 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-19 21:44:35,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:44:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-19 21:44:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 21:44:35,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:35,509 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:35,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:35,725 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1369912335, now seen corresponding path program 2 times [2020-07-19 21:44:35,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:35,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095551461] [2020-07-19 21:44:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-19 21:44:35,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095551461] [2020-07-19 21:44:35,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043090164] [2020-07-19 21:44:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:44:36,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-19 21:44:36,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:36,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2020-07-19 21:44:36,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494232740] [2020-07-19 21:44:36,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:44:36,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:44:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:36,087 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 7 states. [2020-07-19 21:44:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:36,335 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-07-19 21:44:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:44:36,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-07-19 21:44:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:36,336 INFO L225 Difference]: With dead ends: 80 [2020-07-19 21:44:36,337 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:44:36,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:44:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:44:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-19 21:44:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-19 21:44:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-19 21:44:36,345 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 61 [2020-07-19 21:44:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:36,345 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-19 21:44:36,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:44:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-19 21:44:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-19 21:44:36,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:36,347 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:36,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:36,562 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:36,563 INFO L82 PathProgramCache]: Analyzing trace with hash 190779759, now seen corresponding path program 3 times [2020-07-19 21:44:36,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:36,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734038137] [2020-07-19 21:44:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-19 21:44:36,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734038137] [2020-07-19 21:44:36,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663284402] [2020-07-19 21:44:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:44:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-19 21:44:36,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:36,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-07-19 21:44:36,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718931873] [2020-07-19 21:44:36,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:44:36,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:44:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:36,873 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2020-07-19 21:44:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:37,138 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-07-19 21:44:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:44:37,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-07-19 21:44:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:37,140 INFO L225 Difference]: With dead ends: 82 [2020-07-19 21:44:37,141 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:44:37,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:44:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:44:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-19 21:44:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 21:44:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-19 21:44:37,150 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 63 [2020-07-19 21:44:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:37,150 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-19 21:44:37,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:44:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-19 21:44:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-19 21:44:37,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:37,152 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:37,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-19 21:44:37,368 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1072295789, now seen corresponding path program 4 times [2020-07-19 21:44:37,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:37,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70459808] [2020-07-19 21:44:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-19 21:44:37,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70459808] [2020-07-19 21:44:37,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188582366] [2020-07-19 21:44:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:44:37,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-19 21:44:37,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:37,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 11 [2020-07-19 21:44:37,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47719894] [2020-07-19 21:44:37,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:44:37,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:44:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:44:37,581 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 11 states. [2020-07-19 21:44:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:38,004 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2020-07-19 21:44:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:44:38,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-07-19 21:44:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:38,006 INFO L225 Difference]: With dead ends: 86 [2020-07-19 21:44:38,006 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 21:44:38,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:44:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 21:44:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-07-19 21:44:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 21:44:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-07-19 21:44:38,014 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2020-07-19 21:44:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:38,015 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-07-19 21:44:38,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:44:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-07-19 21:44:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-19 21:44:38,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:38,016 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:38,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:38,226 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash -293562262, now seen corresponding path program 1 times [2020-07-19 21:44:38,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:38,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774394556] [2020-07-19 21:44:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:38,243 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:38,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521178837] [2020-07-19 21:44:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 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 [2020-07-19 21:44:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:44:38,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-19 21:44:38,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774394556] [2020-07-19 21:44:38,352 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:38,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521178837] [2020-07-19 21:44:38,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:38,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-19 21:44:38,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577338491] [2020-07-19 21:44:38,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:44:38,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:44:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:38,354 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 5 states. [2020-07-19 21:44:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:38,381 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-07-19 21:44:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:44:38,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-07-19 21:44:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:38,383 INFO L225 Difference]: With dead ends: 78 [2020-07-19 21:44:38,384 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 21:44:38,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 21:44:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-19 21:44:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-19 21:44:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-07-19 21:44:38,393 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 76 [2020-07-19 21:44:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:38,393 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-07-19 21:44:38,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:44:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-07-19 21:44:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 21:44:38,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:38,395 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:38,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:38,601 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash -855759126, now seen corresponding path program 2 times [2020-07-19 21:44:38,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:38,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344806733] [2020-07-19 21:44:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:38,620 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:38,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624218628] [2020-07-19 21:44:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 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 [2020-07-19 21:44:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:44:38,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-19 21:44:38,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344806733] [2020-07-19 21:44:38,735 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:38,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624218628] [2020-07-19 21:44:38,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:38,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 21:44:38,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345775901] [2020-07-19 21:44:38,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:44:38,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:44:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:38,737 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2020-07-19 21:44:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:38,780 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-07-19 21:44:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:44:38,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-07-19 21:44:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:38,782 INFO L225 Difference]: With dead ends: 84 [2020-07-19 21:44:38,782 INFO L226 Difference]: Without dead ends: 55 [2020-07-19 21:44:38,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-19 21:44:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-19 21:44:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-19 21:44:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-19 21:44:38,789 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 85 [2020-07-19 21:44:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:38,789 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-19 21:44:38,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:44:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-19 21:44:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-19 21:44:38,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:38,791 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:39,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-19 21:44:39,006 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:39,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 3 times [2020-07-19 21:44:39,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:39,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210377154] [2020-07-19 21:44:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:39,021 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:39,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785350832] [2020-07-19 21:44:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:44:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 21:44:39,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210377154] [2020-07-19 21:44:39,114 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:39,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785350832] [2020-07-19 21:44:39,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:39,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-07-19 21:44:39,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624496622] [2020-07-19 21:44:39,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:44:39,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:39,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:44:39,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:44:39,116 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 4 states. [2020-07-19 21:44:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:39,132 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-07-19 21:44:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:44:39,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-07-19 21:44:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:39,134 INFO L225 Difference]: With dead ends: 84 [2020-07-19 21:44:39,134 INFO L226 Difference]: Without dead ends: 58 [2020-07-19 21:44:39,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:44:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-19 21:44:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-19 21:44:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:44:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-07-19 21:44:39,141 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 94 [2020-07-19 21:44:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:39,142 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-07-19 21:44:39,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:44:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-07-19 21:44:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-19 21:44:39,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:39,143 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:39,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:39,359 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1679580114, now seen corresponding path program 4 times [2020-07-19 21:44:39,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:39,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513011023] [2020-07-19 21:44:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:39,387 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:39,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439806530] [2020-07-19 21:44:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:44:39,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 21:44:39,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513011023] [2020-07-19 21:44:39,498 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:39,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439806530] [2020-07-19 21:44:39,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:39,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-19 21:44:39,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142332066] [2020-07-19 21:44:39,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:44:39,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:44:39,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:39,500 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 5 states. [2020-07-19 21:44:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:39,528 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-07-19 21:44:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:44:39,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-07-19 21:44:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:39,531 INFO L225 Difference]: With dead ends: 86 [2020-07-19 21:44:39,531 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 21:44:39,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 21:44:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-07-19 21:44:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 21:44:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-07-19 21:44:39,539 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 96 [2020-07-19 21:44:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:39,540 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-07-19 21:44:39,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:44:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-07-19 21:44:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-19 21:44:39,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:39,541 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:39,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:44:39,750 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2078244212, now seen corresponding path program 5 times [2020-07-19 21:44:39,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:39,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983375201] [2020-07-19 21:44:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:39,774 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:39,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267028888] [2020-07-19 21:44:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:44:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 21:44:39,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983375201] [2020-07-19 21:44:39,869 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:39,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267028888] [2020-07-19 21:44:39,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:39,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-19 21:44:39,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087913077] [2020-07-19 21:44:39,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:44:39,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:44:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:44:39,871 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 6 states. [2020-07-19 21:44:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:39,896 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-07-19 21:44:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:44:39,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-07-19 21:44:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:39,901 INFO L225 Difference]: With dead ends: 87 [2020-07-19 21:44:39,901 INFO L226 Difference]: Without dead ends: 61 [2020-07-19 21:44:39,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:44:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-19 21:44:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-19 21:44:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 21:44:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-19 21:44:39,912 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 98 [2020-07-19 21:44:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:39,912 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-19 21:44:39,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:44:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-19 21:44:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-19 21:44:39,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:39,915 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:40,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:40,132 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 6 times [2020-07-19 21:44:40,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:40,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139210748] [2020-07-19 21:44:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 [2020-07-19 21:44:40,148 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:40,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407186921] [2020-07-19 21:44:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b330530 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:44:40,325 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:44:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:44:40,402 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:44:40,456 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:44:40,456 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:44:40,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:44:40,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:44:40 BoogieIcfgContainer [2020-07-19 21:44:40,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:44:40,751 INFO L168 Benchmark]: Toolchain (without parser) took 9308.71 ms. Allocated memory was 138.4 MB in the beginning and 278.4 MB in the end (delta: 140.0 MB). Free memory was 101.3 MB in the beginning and 239.1 MB in the end (delta: -137.8 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:40,751 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-19 21:44:40,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.71 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 90.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:40,752 INFO L168 Benchmark]: Boogie Preprocessor took 146.19 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 90.1 MB in the beginning and 181.5 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:40,753 INFO L168 Benchmark]: RCFGBuilder took 512.36 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 163.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:40,754 INFO L168 Benchmark]: TraceAbstraction took 8321.39 ms. Allocated memory was 203.9 MB in the beginning and 278.4 MB in the end (delta: 74.4 MB). Free memory was 163.1 MB in the beginning and 239.1 MB in the end (delta: -76.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-19 21:44:40,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.71 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 90.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.19 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 90.1 MB in the beginning and 181.5 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 512.36 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 163.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8321.39 ms. Allocated memory was 203.9 MB in the beginning and 278.4 MB in the end (delta: 74.4 MB). Free memory was 163.1 MB in the beginning and 239.1 MB in the end (delta: -76.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; VAL [x={2:0}] [L32] CALL init_nondet(x) VAL [x={2:0}] [L5] int i; [L6] i = 0 VAL [i=0, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=1, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=2, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=3, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=4, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=5, x={2:0}, x={2:0}] [L6] COND FALSE !(i < 5) VAL [i=5, x={2:0}, x={2:0}] [L32] RET init_nondet(x) VAL [x={2:0}] [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; VAL [x={2:0}] [L38] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L38] RET, EXPR rangesum(x) VAL [rangesum(x)=0, x={2:0}] [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp VAL [ret=0, temp=-2, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=0, ret=0, temp=-2, x={2:0}] [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=1, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=2, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=3, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=4, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=0, ret2=0, temp=3, x={2:0}] [L46] x[5 -1] = temp VAL [i=4, ret=0, ret2=0, temp=3, x={2:0}] [L47] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=5, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=2, cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=2, ret=0, ret2=0, temp=3, x={2:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=0, ret2=0, ret5=2, temp=3, x={2:0}] [L50] __VERIFIER_error() VAL [i=4, ret=0, ret2=0, ret5=2, temp=3, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.1s, OverallIterations: 15, TraceHistogramMax: 15, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 489 SDtfs, 177 SDslu, 883 SDs, 0 SdLazy, 504 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 983 GetRequests, 910 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 16 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 1275 NumberOfCodeBlocks, 1275 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1120 ConstructedInterpolants, 0 QuantifiedInterpolants, 92335 SizeOfPredicates, 12 NumberOfNonLiveVariables, 2776 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 2253/2382 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...