/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.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:04:19,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:04:19,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:04:19,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:04:19,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:04:19,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:04:19,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:04:19,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:04:19,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:04:19,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:04:19,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:04:19,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:04:19,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:04:19,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:04:19,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:04:19,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:04:19,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:04:19,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:04:19,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:04:19,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:04:19,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:04:19,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:04:19,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:04:19,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:04:19,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 06:04:19,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 06:04:19,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 06:04:19,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 06:04:19,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 06:04:19,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 06:04:19,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 06:04:19,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 06:04:19,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 06:04:19,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 06:04:19,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 06:04:19,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 06:04:19,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 06:04:19,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 06:04:19,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:04:19,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:04:19,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:04:19,440 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 [2020-07-20 06:04:19,462 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:04:19,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:04:19,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:04:19,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:04:19,464 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:04:19,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:04:19,465 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:04:19,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:04:19,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:04:19,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:04:19,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:04:19,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:04:19,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:04:19,467 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:04:19,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:04:19,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:04:19,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:04:19,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:04:19,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:04:19,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:04:19,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:04:19,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:04:19,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:04:19,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:04:19,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:04:19,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:04:19,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:04:19,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:04:19,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:04:19,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:04:19,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:04:19,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:04:19,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:04:19,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:04:19,805 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:04:19,806 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 06:04:19,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3787aff9/9f161bba022048469f44b51a5e82bd64/FLAGd735ac82e [2020-07-20 06:04:20,396 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:04:20,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 06:04:20,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3787aff9/9f161bba022048469f44b51a5e82bd64/FLAGd735ac82e [2020-07-20 06:04:20,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3787aff9/9f161bba022048469f44b51a5e82bd64 [2020-07-20 06:04:20,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:04:20,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:04:20,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:04:20,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:04:20,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:04:20,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:04:20" (1/1) ... [2020-07-20 06:04:20,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ccc7e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:20, skipping insertion in model container [2020-07-20 06:04:20,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:04:20" (1/1) ... [2020-07-20 06:04:20,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:04:20,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:04:20,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:04:20,973 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:04:20,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:04:21,012 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:04:21,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21 WrapperNode [2020-07-20 06:04:21,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:04:21,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:04:21,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:04:21,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:04:21,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (1/1) ... [2020-07-20 06:04:21,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (1/1) ... [2020-07-20 06:04:21,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (1/1) ... [2020-07-20 06:04:21,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (1/1) ... [2020-07-20 06:04:21,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (1/1) ... [2020-07-20 06:04:21,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (1/1) ... [2020-07-20 06:04:21,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (1/1) ... [2020-07-20 06:04:21,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:04:21,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:04:21,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:04:21,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:04:21,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (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 [2020-07-20 06:04:21,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:04:21,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:04:21,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:04:21,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:04:21,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:04:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:04:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:04:21,238 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:04:21,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:04:21,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:04:21,239 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 06:04:21,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:04:21,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 06:04:21,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:04:21,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:04:21,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:04:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:04:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:04:21,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:04:21,609 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 06:04:21,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:04:21 BoogieIcfgContainer [2020-07-20 06:04:21,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:04:21,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:04:21,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:04:21,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:04:21,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:04:20" (1/3) ... [2020-07-20 06:04:21,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bad1272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:04:21, skipping insertion in model container [2020-07-20 06:04:21,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:21" (2/3) ... [2020-07-20 06:04:21,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bad1272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:04:21, skipping insertion in model container [2020-07-20 06:04:21,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:04:21" (3/3) ... [2020-07-20 06:04:21,623 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-20 06:04:21,632 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:04:21,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:04:21,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:04:21,676 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:04:21,677 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:04:21,677 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:04:21,677 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:04:21,677 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:04:21,677 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:04:21,677 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:04:21,677 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:04:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 06:04:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 06:04:21,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:21,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:21,702 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 06:04:21,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:21,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626306402] [2020-07-20 06:04:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:04:21,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626306402] [2020-07-20 06:04:21,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:04:21,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:04:21,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836392970] [2020-07-20 06:04:21,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:04:21,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:04:21,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:04:21,952 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-20 06:04:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:22,088 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 06:04:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:04:22,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 06:04:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:22,100 INFO L225 Difference]: With dead ends: 62 [2020-07-20 06:04:22,101 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 06:04:22,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:04:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 06:04:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 06:04:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 06:04:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 06:04:22,150 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 06:04:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:22,151 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 06:04:22,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:04:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 06:04:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 06:04:22,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:22,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:22,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:04:22,153 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-20 06:04:22,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:22,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835123000] [2020-07-20 06:04:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:22,180 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:22,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965105745] [2020-07-20 06:04:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c663d2f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:22,301 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c663d2f issued 2 check-sat command(s) [2020-07-20 06:04:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:04:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:04:22,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835123000] [2020-07-20 06:04:22,355 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:04:22,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965105745] [2020-07-20 06:04:22,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:04:22,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:04:22,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825144217] [2020-07-20 06:04:22,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:04:22,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:22,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:04:22,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:04:22,359 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-20 06:04:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:22,446 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 06:04:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:04:22,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 06:04:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:22,450 INFO L225 Difference]: With dead ends: 56 [2020-07-20 06:04:22,451 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 06:04:22,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:04:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 06:04:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 06:04:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 06:04:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 06:04:22,466 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 06:04:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:22,466 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 06:04:22,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:04:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 06:04:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 06:04:22,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:22,468 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 06:04:22,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:04:22,683 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:22,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 06:04:22,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:22,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196428651] [2020-07-20 06:04:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:22,718 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:22,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810646270] [2020-07-20 06:04:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6be6061c 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 [2020-07-20 06:04:22,787 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6be6061c issued 4 check-sat command(s) [2020-07-20 06:04:22,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 06:04:22,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:22,857 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 06:04:22,858 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 06:04:22,869 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 06:04:22,870 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:04:22,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 06:04:22,950 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 06:04:22,951 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 06:04:22,952 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 06:04:22,970 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 06:04:22,971 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:04:22,971 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 06:04:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:04:23,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196428651] [2020-07-20 06:04:23,033 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:04:23,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810646270] [2020-07-20 06:04:23,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:04:23,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 06:04:23,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310889668] [2020-07-20 06:04:23,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:04:23,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:23,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:04:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:04:23,039 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-07-20 06:04:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:23,391 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-07-20 06:04:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:04:23,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 06:04:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:23,396 INFO L225 Difference]: With dead ends: 87 [2020-07-20 06:04:23,396 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 06:04:23,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-07-20 06:04:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 06:04:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2020-07-20 06:04:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 06:04:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-07-20 06:04:23,411 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 28 [2020-07-20 06:04:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:23,412 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-07-20 06:04:23,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:04:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-07-20 06:04:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 06:04:23,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:23,413 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 06:04:23,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:23,629 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-20 06:04:23,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:23,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492360123] [2020-07-20 06:04:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 06:04:23,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492360123] [2020-07-20 06:04:23,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:04:23,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:04:23,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867039329] [2020-07-20 06:04:23,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:04:23,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:04:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:04:23,734 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2020-07-20 06:04:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:23,834 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-07-20 06:04:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:04:23,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-20 06:04:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:23,839 INFO L225 Difference]: With dead ends: 92 [2020-07-20 06:04:23,839 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 06:04:23,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:04:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 06:04:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-20 06:04:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 06:04:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-07-20 06:04:23,851 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-07-20 06:04:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:23,852 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-07-20 06:04:23,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:04:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-07-20 06:04:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 06:04:23,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:23,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:23,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 06:04:23,855 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1029440732, now seen corresponding path program 1 times [2020-07-20 06:04:23,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:23,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76270073] [2020-07-20 06:04:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:23,883 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:23,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094943109] [2020-07-20 06:04:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c0d2fef 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 [2020-07-20 06:04:23,949 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c0d2fef issued 4 check-sat command(s) [2020-07-20 06:04:23,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:04:23,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:04:24,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76270073] [2020-07-20 06:04:24,004 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:04:24,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094943109] [2020-07-20 06:04:24,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:04:24,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 06:04:24,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874804934] [2020-07-20 06:04:24,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:04:24,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:04:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:04:24,007 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2020-07-20 06:04:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:24,209 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-07-20 06:04:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:04:24,211 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 06:04:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:24,214 INFO L225 Difference]: With dead ends: 109 [2020-07-20 06:04:24,214 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 06:04:24,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:04:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 06:04:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-07-20 06:04:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 06:04:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-07-20 06:04:24,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 31 [2020-07-20 06:04:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:24,244 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-07-20 06:04:24,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:04:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-07-20 06:04:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 06:04:24,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:24,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:24,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:24,465 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:24,466 INFO L82 PathProgramCache]: Analyzing trace with hash -792264295, now seen corresponding path program 1 times [2020-07-20 06:04:24,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:24,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355921579] [2020-07-20 06:04:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:24,500 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:24,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220522810] [2020-07-20 06:04:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3eed4345 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:24,601 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3eed4345 issued 4 check-sat command(s) [2020-07-20 06:04:24,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:24,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 06:04:24,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:24,641 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 06:04:24,641 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 06:04:24,650 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 06:04:24,650 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:04:24,650 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 06:04:24,797 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-07-20 06:04:24,798 INFO L350 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2020-07-20 06:04:24,799 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 140 [2020-07-20 06:04:24,802 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 06:04:24,852 INFO L624 ElimStorePlain]: treesize reduction 106, result has 36.5 percent of original size [2020-07-20 06:04:24,855 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:04:24,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:7 [2020-07-20 06:04:24,878 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 06:04:24,879 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 06:04:24,880 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 06:04:24,889 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-20 06:04:24,889 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:04:24,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-20 06:04:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 06:04:24,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355921579] [2020-07-20 06:04:24,918 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:04:24,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220522810] [2020-07-20 06:04:24,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:04:24,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 06:04:24,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173142725] [2020-07-20 06:04:24,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:04:24,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:04:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:04:24,920 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 9 states. [2020-07-20 06:04:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:25,048 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-07-20 06:04:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:04:25,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-07-20 06:04:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:25,051 INFO L225 Difference]: With dead ends: 63 [2020-07-20 06:04:25,051 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 06:04:25,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:04:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 06:04:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2020-07-20 06:04:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 06:04:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-07-20 06:04:25,067 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 34 [2020-07-20 06:04:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:25,067 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-07-20 06:04:25,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:04:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-07-20 06:04:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 06:04:25,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:25,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:25,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:25,280 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:25,281 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-20 06:04:25,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:25,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982584114] [2020-07-20 06:04:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:25,298 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:25,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348835979] [2020-07-20 06:04:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6bdd8e10 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 [2020-07-20 06:04:26,253 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6bdd8e10 issued 4 check-sat command(s) [2020-07-20 06:04:26,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:04:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 06:04:26,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982584114] [2020-07-20 06:04:26,321 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:04:26,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348835979] [2020-07-20 06:04:26,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:04:26,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 06:04:26,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065489286] [2020-07-20 06:04:26,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:04:26,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:26,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:04:26,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:04:26,323 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 7 states. [2020-07-20 06:04:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:26,471 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-07-20 06:04:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:04:26,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-20 06:04:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:26,473 INFO L225 Difference]: With dead ends: 90 [2020-07-20 06:04:26,473 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 06:04:26,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:04:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 06:04:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-20 06:04:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 06:04:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-20 06:04:26,490 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2020-07-20 06:04:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:26,491 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-20 06:04:26,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:04:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-20 06:04:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 06:04:26,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:26,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:26,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 06:04:26,712 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-20 06:04:26,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:26,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197937980] [2020-07-20 06:04:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c449f9b [2020-07-20 06:04:26,732 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:26,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583624053] [2020-07-20 06:04:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e56f6f4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:26,804 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e56f6f4 issued 4 check-sat command(s) [2020-07-20 06:04:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 06:04:26,805 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:04:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:04:26,825 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:04:26,853 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 06:04:26,854 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 06:04:27,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:27,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:04:27 BoogieIcfgContainer [2020-07-20 06:04:27,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:04:27,124 INFO L168 Benchmark]: Toolchain (without parser) took 6376.24 ms. Allocated memory was 144.2 MB in the beginning and 249.6 MB in the end (delta: 105.4 MB). Free memory was 102.4 MB in the beginning and 104.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 102.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:27,125 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 06:04:27,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.00 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:27,127 INFO L168 Benchmark]: Boogie Preprocessor took 161.22 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 179.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:27,127 INFO L168 Benchmark]: RCFGBuilder took 439.81 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 161.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:27,128 INFO L168 Benchmark]: TraceAbstraction took 5505.57 ms. Allocated memory was 201.3 MB in the beginning and 249.6 MB in the end (delta: 48.2 MB). Free memory was 160.6 MB in the beginning and 104.9 MB in the end (delta: 55.7 MB). Peak memory consumption was 104.0 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:27,132 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.00 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 161.22 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 179.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 439.81 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 161.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5505.57 ms. Allocated memory was 201.3 MB in the beginning and 249.6 MB in the end (delta: 48.2 MB). Free memory was 160.6 MB in the beginning and 104.9 MB in the end (delta: 55.7 MB). Peak memory consumption was 104.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={1:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={1:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L29] COND TRUE i