/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:17:17,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:17:17,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:17:17,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:17:17,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:17:17,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:17:17,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:17:17,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:17:17,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:17:17,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:17:17,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:17:17,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:17:17,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:17:17,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:17:17,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:17:17,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:17:17,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:17:17,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:17:17,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:17:17,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:17:17,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:17:17,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:17:17,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:17:17,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:17:17,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:17:17,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:17:17,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:17:17,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:17:17,303 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 [2020-07-17 12:17:17,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:17:17,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:17:17,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:17:17,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:17:17,318 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:17:17,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:17:17,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:17:17,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:17:17,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:17:17,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:17:17,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:17:17,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:17:17,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:17:17,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:17:17,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:17:17,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:17:17,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:17:17,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:17:17,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:17:17,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:17:17,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:17:17,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:17:17,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:17:17,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:17:17,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:17:17,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:17:17,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:17:17,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:17:17,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:17:17,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:17:17,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:17:17,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:17:17,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:17:17,618 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:17:17,619 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:17:17,620 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-17 12:17:17,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/638183db8/535daa6b7f8b44c9aee252211314f398/FLAGd58a98062 [2020-07-17 12:17:18,090 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:17:18,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-17 12:17:18,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/638183db8/535daa6b7f8b44c9aee252211314f398/FLAGd58a98062 [2020-07-17 12:17:18,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/638183db8/535daa6b7f8b44c9aee252211314f398 [2020-07-17 12:17:18,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:17:18,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:17:18,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:17:18,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:17:18,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:17:18,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37af86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18, skipping insertion in model container [2020-07-17 12:17:18,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:17:18,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:17:18,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:17:18,745 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:17:18,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:17:18,774 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:17:18,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18 WrapperNode [2020-07-17 12:17:18,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:17:18,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:17:18,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:17:18,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:17:18,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:17:18,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:17:18,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:17:18,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:17:18,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (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 [2020-07-17 12:17:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:17:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:17:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:17:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:17:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:17:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:17:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:17:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:17:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:17:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:17:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:17:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:17:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:17:19,137 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:17:19,137 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:17:19,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:17:19 BoogieIcfgContainer [2020-07-17 12:17:19,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:17:19,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:17:19,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:17:19,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:17:19,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:17:18" (1/3) ... [2020-07-17 12:17:19,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef84c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:17:19, skipping insertion in model container [2020-07-17 12:17:19,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (2/3) ... [2020-07-17 12:17:19,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef84c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:17:19, skipping insertion in model container [2020-07-17 12:17:19,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:17:19" (3/3) ... [2020-07-17 12:17:19,148 INFO L109 eAbstractionObserver]: Analyzing ICFG geo1.c [2020-07-17 12:17:19,158 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:17:19,165 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:17:19,179 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:17:19,202 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:17:19,202 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:17:19,202 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:17:19,202 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:17:19,202 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:17:19,202 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:17:19,203 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:17:19,203 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:17:19,220 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-17 12:17:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:17:19,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:19,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:19,227 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:19,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1923958992, now seen corresponding path program 1 times [2020-07-17 12:17:19,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:19,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261750399] [2020-07-17 12:17:19,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:19,321 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:17:19,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172278807] [2020-07-17 12:17:19,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 12:17:19,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:17:19,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261750399] [2020-07-17 12:17:19,488 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:17:19,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172278807] [2020-07-17 12:17:19,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:17:19,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:17:19,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120621298] [2020-07-17 12:17:19,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:17:19,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:19,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:17:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:17:19,513 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-17 12:17:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:19,614 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-07-17 12:17:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:17:19,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-17 12:17:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:19,624 INFO L225 Difference]: With dead ends: 45 [2020-07-17 12:17:19,625 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 12:17:19,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:17:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 12:17:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-17 12:17:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-17 12:17:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-17 12:17:19,667 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-17 12:17:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:19,667 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-17 12:17:19,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:17:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-17 12:17:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 12:17:19,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:19,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:19,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-17 12:17:19,882 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1187633082, now seen corresponding path program 1 times [2020-07-17 12:17:19,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:19,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832860874] [2020-07-17 12:17:19,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:19,893 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:17:19,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15880107] [2020-07-17 12:17:19,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 12:17:19,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:20,101 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:17:20,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832860874] [2020-07-17 12:17:20,185 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:17:20,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15880107] [2020-07-17 12:17:20,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:17:20,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 12:17:20,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894594289] [2020-07-17 12:17:20,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:17:20,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:17:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:17:20,190 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-17 12:17:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:22,519 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-07-17 12:17:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:17:22,520 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-17 12:17:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:22,522 INFO L225 Difference]: With dead ends: 28 [2020-07-17 12:17:22,523 INFO L226 Difference]: Without dead ends: 20 [2020-07-17 12:17:22,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:17:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-17 12:17:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-17 12:17:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-17 12:17:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-17 12:17:22,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-07-17 12:17:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:22,531 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-17 12:17:22,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:17:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-17 12:17:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 12:17:22,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:22,532 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:22,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:22,738 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1235596592, now seen corresponding path program 1 times [2020-07-17 12:17:22,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:22,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875533814] [2020-07-17 12:17:22,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:22,746 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:17:22,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160619084] [2020-07-17 12:17:22,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-17 12:17:22,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:17:22,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875533814] [2020-07-17 12:17:22,856 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:17:22,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160619084] [2020-07-17 12:17:22,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:17:22,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 12:17:22,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983022526] [2020-07-17 12:17:22,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:17:22,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:22,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:17:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:17:22,862 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-07-17 12:17:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:22,947 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-17 12:17:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:17:22,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-17 12:17:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:22,950 INFO L225 Difference]: With dead ends: 30 [2020-07-17 12:17:22,950 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 12:17:22,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:17:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 12:17:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-17 12:17:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 12:17:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-17 12:17:22,964 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-17 12:17:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:22,964 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-17 12:17:22,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:17:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-17 12:17:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:17:22,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:22,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:23,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:23,181 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash -677841104, now seen corresponding path program 2 times [2020-07-17 12:17:23,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:23,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294678281] [2020-07-17 12:17:23,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:23,190 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:17:23,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294554616] [2020-07-17 12:17:23,190 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:17:23,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:17:23,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:23,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 12:17:23,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:23,392 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:17:25,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294678281] [2020-07-17 12:17:25,481 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:17:25,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294554616] [2020-07-17 12:17:25,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:17:25,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 12:17:25,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803516059] [2020-07-17 12:17:25,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:17:25,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:25,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:17:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:17:25,484 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2020-07-17 12:17:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:28,535 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-17 12:17:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:17:28,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-17 12:17:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:28,538 INFO L225 Difference]: With dead ends: 37 [2020-07-17 12:17:28,538 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 12:17:28,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:17:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 12:17:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-17 12:17:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-17 12:17:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-17 12:17:28,547 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-17 12:17:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:28,547 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-17 12:17:28,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:17:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-17 12:17:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:17:28,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:28,549 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:28,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:28,752 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1339520304, now seen corresponding path program 3 times [2020-07-17 12:17:28,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:28,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472988375] [2020-07-17 12:17:28,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:28,761 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:17:28,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315580353] [2020-07-17 12:17:28,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:28,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-17 12:17:28,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:28,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-17 12:17:28,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:30,909 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-17 12:17:33,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472988375] [2020-07-17 12:17:33,007 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:17:33,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315580353] [2020-07-17 12:17:33,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:17:33,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 12:17:33,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349497839] [2020-07-17 12:17:33,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:17:33,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:33,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:17:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2020-07-17 12:17:33,011 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 8 states. [2020-07-17 12:17:37,188 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-17 12:17:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:43,390 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-17 12:17:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:17:43,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-07-17 12:17:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:43,391 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:17:43,392 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:17:43,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2020-07-17 12:17:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:17:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:17:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:17:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:17:43,393 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-17 12:17:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:43,394 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:17:43,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:17:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:17:43,395 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:17:43,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:43,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:17:43,650 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:17:43,651 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:17:43,651 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:17:43,651 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:17:43,651 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:17:43,651 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:17:43,651 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 10 12) no Hoare annotation was computed. [2020-07-17 12:17:43,651 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-07-17 12:17:43,652 INFO L268 CegarLoopResult]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2020-07-17 12:17:43,652 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2020-07-17 12:17:43,652 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (exists ((v_main_~x~0_15 Int)) (let ((.cse0 (* main_~z~0 v_main_~x~0_15))) (and (= main_~x~0 (+ .cse0 1)) (= (+ main_~z~0 (* main_~z~0 main_~z~0 v_main_~x~0_15)) (+ main_~y~0 .cse0))))) [2020-07-17 12:17:43,652 INFO L268 CegarLoopResult]: For program point L31-1(lines 30 40) no Hoare annotation was computed. [2020-07-17 12:17:43,652 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 46) the Hoare annotation is: true [2020-07-17 12:17:43,652 INFO L264 CegarLoopResult]: At program point L30-2(lines 30 40) the Hoare annotation is: (exists ((v_main_~x~0_15 Int)) (let ((.cse0 (* main_~z~0 v_main_~x~0_15))) (and (= main_~x~0 (+ .cse0 1)) (= (+ main_~z~0 (* main_~z~0 main_~z~0 v_main_~x~0_15)) (+ main_~y~0 .cse0))))) [2020-07-17 12:17:43,653 INFO L268 CegarLoopResult]: For program point L30-3(lines 30 40) no Hoare annotation was computed. [2020-07-17 12:17:43,653 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 46) no Hoare annotation was computed. [2020-07-17 12:17:43,653 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 46) no Hoare annotation was computed. [2020-07-17 12:17:43,653 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (exists ((v_main_~x~0_12 Int) (main_~z~0 Int)) (let ((.cse0 (* v_main_~x~0_12 main_~z~0))) (and (= .cse0 (+ main_~x~0 v_main_~x~0_12)) (= (+ main_~y~0 v_main_~x~0_12) (+ .cse0 1))))) [2020-07-17 12:17:43,653 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-07-17 12:17:43,653 INFO L268 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-07-17 12:17:43,654 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2020-07-17 12:17:43,654 INFO L268 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-07-17 12:17:43,654 INFO L268 CegarLoopResult]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2020-07-17 12:17:43,654 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2020-07-17 12:17:43,654 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-17 12:17:43,663 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,664 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,665 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,676 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,677 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,677 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:17:43 BoogieIcfgContainer [2020-07-17 12:17:43,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:17:43,682 INFO L168 Benchmark]: Toolchain (without parser) took 25158.81 ms. Allocated memory was 145.2 MB in the beginning and 235.4 MB in the end (delta: 90.2 MB). Free memory was 102.1 MB in the beginning and 136.5 MB in the end (delta: -34.4 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:43,683 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.2 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. [2020-07-17 12:17:43,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.73 ms. Allocated memory is still 145.2 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:43,684 INFO L168 Benchmark]: Boogie Preprocessor took 115.73 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.2 MB in the beginning and 182.3 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:43,685 INFO L168 Benchmark]: RCFGBuilder took 249.50 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 168.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:43,686 INFO L168 Benchmark]: TraceAbstraction took 24537.84 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.9 MB in the beginning and 136.5 MB in the end (delta: 31.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:43,690 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.2 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 249.73 ms. Allocated memory is still 145.2 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.73 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.2 MB in the beginning and 182.3 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.50 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 168.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24537.84 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.9 MB in the beginning and 136.5 MB in the end (delta: 31.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant [2020-07-17 12:17:43,699 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,699 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,700 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,700 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,700 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] [2020-07-17 12:17:43,700 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_15,QUANTIFIED] Derived loop invariant: (\exists v_main_~x~0_15 : int :: x == z * v_main_~x~0_15 + 1 && z + z * z * v_main_~x~0_15 == y + z * v_main_~x~0_15) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 43 SDslu, 258 SDs, 0 SdLazy, 192 SolverSat, 9 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 11.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 23 NumberOfFragments, 65 HoareAnnotationTreeSize, 14 FomulaSimplifications, 248 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 99 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 94 ConstructedInterpolants, 5 QuantifiedInterpolants, 7704 SizeOfPredicates, 16 NumberOfNonLiveVariables, 250 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 42/54 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 correct! Received shutdown request...