/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/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:34:31,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:34:31,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:34:31,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:34:31,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:34:31,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:34:31,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:34:31,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:34:31,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:34:31,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:34:31,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:34:31,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:34:31,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:34:31,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:34:31,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:34:31,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:34:31,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:34:31,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:34:31,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:34:31,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:34:31,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:34:31,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:34:31,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:34:31,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:34:31,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:34:31,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:34:31,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:34:31,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:34:31,165 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 [2020-07-07 11:34:31,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:34:31,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:34:31,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:34:31,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:34:31,209 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:34:31,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:34:31,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:34:31,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:34:31,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:34:31,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:34:31,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:34:31,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:34:31,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:34:31,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:34:31,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:34:31,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:34:31,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:34:31,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:34:31,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:34:31,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:34:31,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:34:31,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:34:31,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:34:31,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:34:31,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:34:31,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:34:31,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:34:31,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:34:31,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:34:31,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:34:31,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:34:31,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:34:31,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:34:31,501 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:34:31,502 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:34:31,503 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-07 11:34:31,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70f994ca/2fa333e780564f7a9bcd117f41041db8/FLAG712ba506a [2020-07-07 11:34:32,040 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:34:32,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-07 11:34:32,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70f994ca/2fa333e780564f7a9bcd117f41041db8/FLAG712ba506a [2020-07-07 11:34:32,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70f994ca/2fa333e780564f7a9bcd117f41041db8 [2020-07-07 11:34:32,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:34:32,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:34:32,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:32,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:34:32,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:34:32,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f00a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32, skipping insertion in model container [2020-07-07 11:34:32,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:34:32,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:34:32,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:32,621 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:34:32,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:32,656 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:34:32,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32 WrapperNode [2020-07-07 11:34:32,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:32,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:34:32,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:34:32,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:34:32,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (1/1) ... [2020-07-07 11:34:32,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:34:32,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:34:32,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:34:32,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:34:32,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (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 [2020-07-07 11:34:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:34:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:34:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:34:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:34:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:34:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:34:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-07 11:34:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:34:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:34:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:34:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:34:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:34:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:34:33,054 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:34:33,054 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:34:33,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:33 BoogieIcfgContainer [2020-07-07 11:34:33,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:34:33,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:34:33,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:34:33,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:34:33,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:34:32" (1/3) ... [2020-07-07 11:34:33,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4836ae95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:33, skipping insertion in model container [2020-07-07 11:34:33,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:32" (2/3) ... [2020-07-07 11:34:33,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4836ae95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:33, skipping insertion in model container [2020-07-07 11:34:33,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:33" (3/3) ... [2020-07-07 11:34:33,069 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-07-07 11:34:33,079 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:34:33,088 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:34:33,107 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:34:33,143 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:34:33,143 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:34:33,143 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:34:33,144 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:34:33,144 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:34:33,144 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:34:33,144 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:34:33,144 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:34:33,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-07 11:34:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:34:33,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:33,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:33,173 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:33,180 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-07 11:34:33,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:33,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624366670] [2020-07-07 11:34:33,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:33,258 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:33,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180315256] [2020-07-07 11:34:33,259 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 [2020-07-07 11:34:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:33,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-07 11:34:33,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:34:33,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624366670] [2020-07-07 11:34:33,347 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:33,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180315256] [2020-07-07 11:34:33,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:33,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 11:34:33,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914417371] [2020-07-07 11:34:33,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:34:33,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:34:33,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:34:33,367 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-07 11:34:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:33,387 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-07 11:34:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:34:33,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-07 11:34:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:33,397 INFO L225 Difference]: With dead ends: 50 [2020-07-07 11:34:33,398 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:34:33,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:34:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:34:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:34:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:34:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-07 11:34:33,436 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-07 11:34:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:33,437 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-07 11:34:33,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:34:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-07 11:34:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:34:33,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:33,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:33,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-07 11:34:33,641 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-07 11:34:33,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:33,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505039761] [2020-07-07 11:34:33,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:33,648 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:33,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978627523] [2020-07-07 11:34:33,649 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 [2020-07-07 11:34:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:33,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 11:34:33,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:33,770 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:34:46,415 WARN L193 SmtUtils]: Spent 8.26 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-07 11:34:46,420 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:35:05,887 WARN L193 SmtUtils]: Spent 12.38 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-07 11:35:07,933 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:35:16,136 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))) is different from false [2020-07-07 11:35:18,153 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))) is different from true [2020-07-07 11:35:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:35:18,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505039761] [2020-07-07 11:35:18,159 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:35:18,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978627523] [2020-07-07 11:35:18,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:35:18,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:35:18,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241047644] [2020-07-07 11:35:18,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:35:18,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:35:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:35:18,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=13, Unknown=2, NotChecked=6, Total=30 [2020-07-07 11:35:18,164 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-07-07 11:35:52,189 WARN L193 SmtUtils]: Spent 32.36 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-07 11:36:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:36:02,629 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-07 11:36:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:36:02,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-07 11:36:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:36:02,635 INFO L225 Difference]: With dead ends: 32 [2020-07-07 11:36:02,636 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:36:02,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.9s TimeCoverageRelationStatistics Valid=13, Invalid=19, Unknown=2, NotChecked=8, Total=42 [2020-07-07 11:36:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:36:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-07 11:36:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:36:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-07 11:36:02,646 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-07-07 11:36:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:36:02,648 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-07 11:36:02,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:36:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-07 11:36:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:36:02,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:36:02,650 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] [2020-07-07 11:36:02,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:36:02,864 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:36:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:36:02,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-07 11:36:02,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:36:02,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448220929] [2020-07-07 11:36:02,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:36:02,871 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:36:02,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194255377] [2020-07-07 11:36:02,872 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 [2020-07-07 11:36:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:36:02,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:36:02,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:36:03,073 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:36:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:36:03,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448220929] [2020-07-07 11:36:03,451 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:36:03,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194255377] [2020-07-07 11:36:03,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:36:03,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-07 11:36:03,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570055898] [2020-07-07 11:36:03,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:36:03,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:36:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:36:03,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:36:03,457 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-07-07 11:36:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:36:10,383 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-07 11:36:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:36:10,384 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-07 11:36:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:36:10,387 INFO L225 Difference]: With dead ends: 33 [2020-07-07 11:36:10,387 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 11:36:10,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:36:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 11:36:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-07 11:36:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-07 11:36:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-07 11:36:10,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 27 [2020-07-07 11:36:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:36:10,396 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-07 11:36:10,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:36:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-07 11:36:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 11:36:10,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:36:10,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:36:10,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:36:10,601 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:36:10,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:36:10,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-07 11:36:10,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:36:10,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072280225] [2020-07-07 11:36:10,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:36:10,607 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:36:10,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468331245] [2020-07-07 11:36:10,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:36:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:36:10,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:36:10,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:36:11,147 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-07 11:36:11,168 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:36:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:36:13,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072280225] [2020-07-07 11:36:13,626 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:36:13,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468331245] [2020-07-07 11:36:13,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:36:13,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:36:13,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658154172] [2020-07-07 11:36:13,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:36:13,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:36:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:36:13,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2020-07-07 11:36:13,633 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 9 states. [2020-07-07 11:36:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:36:22,488 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-07 11:36:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:36:22,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-07 11:36:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:36:22,497 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:36:22,497 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 11:36:22,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2020-07-07 11:36:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 11:36:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-07 11:36:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:36:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-07 11:36:22,514 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-07-07 11:36:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:36:22,514 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-07 11:36:22,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:36:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-07 11:36:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 11:36:22,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:36:22,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:36:22,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:36:22,720 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:36:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:36:22,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-07 11:36:22,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:36:22,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105819994] [2020-07-07 11:36:22,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:36:22,725 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:36:22,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652645678] [2020-07-07 11:36:22,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-07 11:36:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:36:22,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:36:22,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:36:33,543 WARN L193 SmtUtils]: Spent 8.43 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-07 11:36:50,210 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-07 11:36:50,219 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:36:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:36:50,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105819994] [2020-07-07 11:36:50,436 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:36:50,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652645678] [2020-07-07 11:36:50,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:36:50,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:36:50,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960008219] [2020-07-07 11:36:50,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:36:50,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:36:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:36:50,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=50, Unknown=5, NotChecked=0, Total=72 [2020-07-07 11:36:50,438 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-07-07 11:37:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:37:17,934 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-07-07 11:37:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:37:17,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-07 11:37:17,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:37:17,937 INFO L225 Difference]: With dead ends: 48 [2020-07-07 11:37:17,937 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 11:37:17,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=28, Invalid=77, Unknown=5, NotChecked=0, Total=110 [2020-07-07 11:37:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 11:37:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-07 11:37:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-07 11:37:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-07 11:37:17,948 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 29 [2020-07-07 11:37:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:37:17,948 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-07 11:37:17,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:37:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-07 11:37:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:37:17,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:37:17,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:37:18,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:37:18,153 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:37:18,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:37:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1286102758, now seen corresponding path program 2 times [2020-07-07 11:37:18,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:37:18,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827068408] [2020-07-07 11:37:18,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:37:18,160 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:37:18,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210713233] [2020-07-07 11:37:18,161 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:37:18,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:37:18,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:37:18,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-07 11:37:18,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:37:22,639 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-07 11:37:23,054 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-07 11:37:25,996 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:37:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-07 11:37:26,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827068408] [2020-07-07 11:37:26,454 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:37:26,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210713233] [2020-07-07 11:37:26,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:37:26,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-07 11:37:26,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608493833] [2020-07-07 11:37:26,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:37:26,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:37:26,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:37:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2020-07-07 11:37:26,456 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-07-07 11:37:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:37:36,227 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-07-07 11:37:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:37:36,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-07 11:37:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:37:36,234 INFO L225 Difference]: With dead ends: 56 [2020-07-07 11:37:36,234 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:37:36,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-07 11:37:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:37:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-07 11:37:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 11:37:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-07 11:37:36,246 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 37 [2020-07-07 11:37:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:37:36,246 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-07 11:37:36,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:37:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-07 11:37:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:37:36,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:37:36,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:37:36,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:37:36,463 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:37:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:37:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1343361060, now seen corresponding path program 1 times [2020-07-07 11:37:36,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:37:36,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403989116] [2020-07-07 11:37:36,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:37:36,468 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:37:36,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073242443] [2020-07-07 11:37:36,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:37:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:37:36,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:37:36,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:37:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-07 11:37:36,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403989116] [2020-07-07 11:37:36,537 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:37:36,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073242443] [2020-07-07 11:37:36,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:37:36,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-07 11:37:36,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391947506] [2020-07-07 11:37:36,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:37:36,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:37:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:37:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:37:36,539 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 5 states. [2020-07-07 11:37:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:37:36,609 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-07 11:37:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:37:36,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-07 11:37:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:37:36,615 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:37:36,615 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 11:37:36,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:37:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 11:37:36,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-07 11:37:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 11:37:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-07-07 11:37:36,625 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2020-07-07 11:37:36,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:37:36,626 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-07-07 11:37:36,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:37:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-07-07 11:37:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:37:36,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:37:36,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:37:36,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:37:36,832 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:37:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:37:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash 332243810, now seen corresponding path program 2 times [2020-07-07 11:37:36,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:37:36,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615157497] [2020-07-07 11:37:36,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:37:36,838 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:37:36,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607606841] [2020-07-07 11:37:36,838 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:37:36,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:37:36,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:37:36,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-07 11:37:36,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:37:47,768 WARN L193 SmtUtils]: Spent 8.59 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-07 11:38:02,726 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-07 11:38:30,603 WARN L193 SmtUtils]: Spent 6.47 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-07 11:38:30,609 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:38:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 2 refuted. 8 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-07 11:38:32,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615157497] [2020-07-07 11:38:32,382 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:38:32,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607606841] [2020-07-07 11:38:32,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:38:32,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-07 11:38:32,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328253584] [2020-07-07 11:38:32,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:38:32,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:38:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:38:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=60, Unknown=11, NotChecked=0, Total=90 [2020-07-07 11:38:32,385 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 10 states. [2020-07-07 11:39:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:37,624 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-07 11:39:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:39:37,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-07 11:39:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:37,641 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:39:37,641 INFO L226 Difference]: Without dead ends: 62 [2020-07-07 11:39:37,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=30, Invalid=91, Unknown=11, NotChecked=0, Total=132 [2020-07-07 11:39:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-07 11:39:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-07 11:39:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:39:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-07-07 11:39:37,654 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 37 [2020-07-07 11:39:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:37,655 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-07-07 11:39:37,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:39:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-07-07 11:39:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-07 11:39:37,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:37,657 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:37,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-07 11:39:37,858 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 584019147, now seen corresponding path program 3 times [2020-07-07 11:39:37,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:37,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986537187] [2020-07-07 11:39:37,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:37,864 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:39:37,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913030253] [2020-07-07 11:39:37,864 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:39:37,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 11:39:37,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:39:37,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:39:37,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:39:40,822 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-07 11:39:40,988 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:39:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 11:39:43,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986537187] [2020-07-07 11:39:43,538 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:39:43,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913030253] [2020-07-07 11:39:43,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:39:43,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-07 11:39:43,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878794472] [2020-07-07 11:39:43,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:39:43,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:39:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=39, Unknown=2, NotChecked=0, Total=56 [2020-07-07 11:39:43,540 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-07-07 11:39:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:48,344 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-07-07 11:39:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:39:48,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-07-07 11:39:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:48,347 INFO L225 Difference]: With dead ends: 68 [2020-07-07 11:39:48,347 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:39:48,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2020-07-07 11:39:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:39:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-07 11:39:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:39:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-07-07 11:39:48,359 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 45 [2020-07-07 11:39:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:48,359 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-07-07 11:39:48,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:39:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-07-07 11:39:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-07 11:39:48,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:48,361 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:48,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:39:48,566 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 641277449, now seen corresponding path program 2 times [2020-07-07 11:39:48,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:48,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122301291] [2020-07-07 11:39:48,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:48,571 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:39:48,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479368736] [2020-07-07 11:39:48,572 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:39:48,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:39:48,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:39:48,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-07 11:39:48,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:39:48,783 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-07 11:39:59,539 WARN L193 SmtUtils]: Spent 8.50 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-07 11:40:06,383 WARN L193 SmtUtils]: Spent 6.51 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-07 11:40:16,642 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-07 11:40:30,927 WARN L193 SmtUtils]: Spent 8.58 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-07 11:40:49,524 WARN L193 SmtUtils]: Spent 7.26 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-07 11:40:49,535 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:40:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 21 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-07 11:40:50,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122301291] [2020-07-07 11:40:50,836 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:40:50,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479368736] [2020-07-07 11:40:50,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:40:50,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-07 11:40:50,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707806431] [2020-07-07 11:40:50,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:40:50,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:40:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=95, Unknown=10, NotChecked=0, Total=132 [2020-07-07 11:40:50,838 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 12 states. [2020-07-07 11:41:33,301 WARN L193 SmtUtils]: Spent 13.39 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-07 11:42:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:15,827 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-07-07 11:42:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:42:15,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-07-07 11:42:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:15,848 INFO L225 Difference]: With dead ends: 87 [2020-07-07 11:42:15,848 INFO L226 Difference]: Without dead ends: 85 [2020-07-07 11:42:15,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=43, Invalid=155, Unknown=12, NotChecked=0, Total=210 [2020-07-07 11:42:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-07 11:42:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-07-07 11:42:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-07 11:42:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-07-07 11:42:15,865 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 45 [2020-07-07 11:42:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:15,869 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-07-07 11:42:15,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:42:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-07-07 11:42:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-07 11:42:15,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:15,870 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:42:16,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:42:16,085 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash -150985083, now seen corresponding path program 3 times [2020-07-07 11:42:16,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:16,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469692773] [2020-07-07 11:42:16,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:16,091 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:42:16,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343109992] [2020-07-07 11:42:16,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:42:16,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 11:42:16,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:42:16,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:42:16,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:42:18,520 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-07 11:42:18,744 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:42:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 11:42:19,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469692773] [2020-07-07 11:42:19,112 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:42:19,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343109992] [2020-07-07 11:42:19,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:42:19,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-07 11:42:19,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681538822] [2020-07-07 11:42:19,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:42:19,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:42:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2020-07-07 11:42:19,117 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 8 states. [2020-07-07 11:42:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:21,480 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-07-07 11:42:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:42:21,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-07-07 11:42:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:21,483 INFO L225 Difference]: With dead ends: 90 [2020-07-07 11:42:21,483 INFO L226 Difference]: Without dead ends: 88 [2020-07-07 11:42:21,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2020-07-07 11:42:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-07 11:42:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-07-07 11:42:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-07 11:42:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-07-07 11:42:21,513 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 45 [2020-07-07 11:42:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:21,513 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-07-07 11:42:21,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:42:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-07-07 11:42:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-07 11:42:21,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:21,515 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:42:21,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-07 11:42:21,716 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1007285716, now seen corresponding path program 3 times [2020-07-07 11:42:21,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:21,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041444090] [2020-07-07 11:42:21,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:21,721 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:42:21,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783280101] [2020-07-07 11:42:21,722 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:42:21,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 11:42:21,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:42:21,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:42:21,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:42:21,919 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:42:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-07 11:42:22,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041444090] [2020-07-07 11:42:22,089 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:42:22,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783280101] [2020-07-07 11:42:22,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:42:22,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-07 11:42:22,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899302474] [2020-07-07 11:42:22,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:42:22,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:42:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:42:22,091 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 7 states. [2020-07-07 11:42:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:26,526 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-07-07 11:42:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:42:26,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-07-07 11:42:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:26,532 INFO L225 Difference]: With dead ends: 76 [2020-07-07 11:42:26,532 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:42:26,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:42:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:42:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:42:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:42:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:42:26,535 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2020-07-07 11:42:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:26,536 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:42:26,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:42:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:42:26,536 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:42:26,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:42:26,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:42:58,309 WARN L193 SmtUtils]: Spent 31.42 s on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-07-07 11:42:58,589 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-07 11:43:00,691 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 35 DAG size of output: 1 [2020-07-07 11:43:31,323 WARN L193 SmtUtils]: Spent 30.63 s on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-07-07 11:43:31,327 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:43:31,327 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:43:31,327 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:43:31,327 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:43:31,327 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:43:31,327 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:43:31,327 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2020-07-07 11:43:31,327 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-07 11:43:31,327 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-07 11:43:31,327 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-07 11:43:31,328 INFO L264 CegarLoopResult]: At program point L35-2(lines 31 42) the Hoare annotation is: (let ((.cse0 (= 0 (mod (+ main_~u~0 1) (- 2))))) (or (and (= (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2)) (+ (* main_~v~0 2) (* main_~u~0 main_~u~0))) .cse0) (and (= 1 main_~v~0) (= (let ((.cse1 (div (+ (* main_~u~0 (- 1)) 1) (- 2)))) (* .cse1 .cse1)) (+ main_~A~0 main_~r~0)) .cse0))) [2020-07-07 11:43:31,328 INFO L264 CegarLoopResult]: At program point L31-2(lines 31 42) the Hoare annotation is: (let ((.cse0 (+ (* main_~u~0 main_~u~0) (* 2 main_~v~0))) (.cse1 (* main_~v~0 main_~v~0)) (.cse2 (* 2 main_~u~0)) (.cse3 (* 4 main_~A~0))) (and (= .cse0 (+ .cse1 .cse2 .cse3)) (= .cse0 (+ .cse1 .cse2 (* 4 main_~r~0) .cse3)))) [2020-07-07 11:43:31,328 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-07 11:43:31,328 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 47) no Hoare annotation was computed. [2020-07-07 11:43:31,328 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-07 11:43:31,328 INFO L271 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: true [2020-07-07 11:43:31,328 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 47) no Hoare annotation was computed. [2020-07-07 11:43:31,328 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (= 0 (mod (+ main_~u~0 1) (- 2))))) (or (and (= (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2)) (+ (* main_~v~0 2) (* main_~u~0 main_~u~0))) .cse0) (and (= 1 main_~v~0) (= (let ((.cse1 (div (+ (* main_~u~0 (- 1)) 1) (- 2)))) (* .cse1 .cse1)) (+ main_~A~0 main_~r~0)) .cse0))) [2020-07-07 11:43:31,328 INFO L268 CegarLoopResult]: For program point L32-1(lines 31 42) no Hoare annotation was computed. [2020-07-07 11:43:31,329 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 47) the Hoare annotation is: true [2020-07-07 11:43:31,329 INFO L268 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-07-07 11:43:31,329 INFO L268 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-07-07 11:43:31,329 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-07 11:43:31,330 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-07 11:43:31,330 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-07 11:43:31,330 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:43:31,330 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:43:31,330 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-07 11:43:31,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:43:31 BoogieIcfgContainer [2020-07-07 11:43:31,352 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:43:31,357 INFO L168 Benchmark]: Toolchain (without parser) took 538950.10 ms. Allocated memory was 139.5 MB in the beginning and 227.0 MB in the end (delta: 87.6 MB). Free memory was 104.7 MB in the beginning and 161.9 MB in the end (delta: -57.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:43:31,361 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:43:31,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.04 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 94.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:43:31,363 INFO L168 Benchmark]: Boogie Preprocessor took 116.83 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.0 MB in the beginning and 182.8 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:43:31,363 INFO L168 Benchmark]: RCFGBuilder took 284.10 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 169.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:43:31,367 INFO L168 Benchmark]: TraceAbstraction took 538292.59 ms. Allocated memory was 203.9 MB in the beginning and 227.0 MB in the end (delta: 23.1 MB). Free memory was 169.7 MB in the beginning and 161.9 MB in the end (delta: 7.8 MB). Peak memory consumption was 30.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:43:31,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.04 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 94.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.83 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.0 MB in the beginning and 182.8 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 284.10 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 169.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 538292.59 ms. Allocated memory was 203.9 MB in the beginning and 227.0 MB in the end (delta: 23.1 MB). Free memory was 169.7 MB in the beginning and 161.9 MB in the end (delta: 7.8 MB). Peak memory consumption was 30.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 31]: Loop Invariant Derived loop invariant: (v * v + A * 4 + r * 4 + u * 2 == v * 2 + u * u && 0 == (u + 1) % -2) || ((1 == v && (u * -1 + 1) / -2 * ((u * -1 + 1) / -2) == A + r) && 0 == (u + 1) % -2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 473.6s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 259.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 64.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 271 SDtfs, 104 SDslu, 1027 SDs, 0 SdLazy, 713 SolverSat, 23 SolverUnsat, 93 SolverUnknown, 0 SolverNotchecked, 197.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 435 GetRequests, 339 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 244.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 32 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 25 PreInvPairs, 45 NumberOfFragments, 168 HoareAnnotationTreeSize, 25 FomulaSimplifications, 1736 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 97 FormulaSimplificationTreeSizeReductionInter, 64.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 210.6s InterpolantComputationTime, 426 NumberOfCodeBlocks, 370 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 414 ConstructedInterpolants, 3 QuantifiedInterpolants, 105746 SizeOfPredicates, 39 NumberOfNonLiveVariables, 775 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 221/278 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...