/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:02:07,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:02:07,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:02:07,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:02:07,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:02:07,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:02:07,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:02:07,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:02:07,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:02:07,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:02:07,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:02:07,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:02:07,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:02:07,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:02:07,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:02:07,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:02:07,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:02:07,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:02:07,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:02:07,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:02:07,310 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 [2021-05-06 02:02:07,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:02:07,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:02:07,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:02:07,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:02:07,347 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:02:07,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:02:07,348 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:02:07,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:02:07,365 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:02:07,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:02:07,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:02:07,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:02:07,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:02:07,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:02:07,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:02:07,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:02:07,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:02:07,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:02:07,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:02:07,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:02:07,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:02:07,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:02:07,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:02:07,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:02:07,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:02:07,890 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:02:07,894 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:02:07,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i [2021-05-06 02:02:07,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a24764bf8/bc29fdd8364a4b3798e5307fd05708c7/FLAGe03fab041 [2021-05-06 02:02:08,580 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:02:08,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i [2021-05-06 02:02:08,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a24764bf8/bc29fdd8364a4b3798e5307fd05708c7/FLAGe03fab041 [2021-05-06 02:02:08,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a24764bf8/bc29fdd8364a4b3798e5307fd05708c7 [2021-05-06 02:02:08,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:02:08,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:02:08,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:02:08,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:02:08,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:02:08,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:02:08" (1/1) ... [2021-05-06 02:02:08,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e8b74b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:08, skipping insertion in model container [2021-05-06 02:02:08,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:02:08" (1/1) ... [2021-05-06 02:02:08,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:02:08,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:02:09,085 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i[959,972] [2021-05-06 02:02:09,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:02:09,104 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:02:09,171 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i[959,972] [2021-05-06 02:02:09,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:02:09,205 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:02:09,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09 WrapperNode [2021-05-06 02:02:09,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:02:09,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:02:09,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:02:09,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:02:09,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (1/1) ... [2021-05-06 02:02:09,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (1/1) ... [2021-05-06 02:02:09,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (1/1) ... [2021-05-06 02:02:09,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (1/1) ... [2021-05-06 02:02:09,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (1/1) ... [2021-05-06 02:02:09,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (1/1) ... [2021-05-06 02:02:09,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (1/1) ... [2021-05-06 02:02:09,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:02:09,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:02:09,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:02:09,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:02:09,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (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 [2021-05-06 02:02:09,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:02:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:02:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:02:09,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:02:09,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:02:09,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:02:09,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:02:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:02:09,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:02:09,777 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:02:09,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:02:09 BoogieIcfgContainer [2021-05-06 02:02:09,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:02:09,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:02:09,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:02:09,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:02:09,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:02:08" (1/3) ... [2021-05-06 02:02:09,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1419d195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:02:09, skipping insertion in model container [2021-05-06 02:02:09,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:02:09" (2/3) ... [2021-05-06 02:02:09,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1419d195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:02:09, skipping insertion in model container [2021-05-06 02:02:09,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:02:09" (3/3) ... [2021-05-06 02:02:09,784 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.i [2021-05-06 02:02:09,808 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:02:09,811 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:02:09,835 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:02:09,851 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:02:09,852 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:02:09,852 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:02:09,852 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:02:09,852 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:02:09,852 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:02:09,852 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:02:09,852 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:02:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:02:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 02:02:09,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:02:09,872 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:02:09,872 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:02:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:02:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2021-05-06 02:02:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:02:09,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271414740] [2021-05-06 02:02:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:02:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:02:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:02:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:02:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:02:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:02:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:02:10,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:02:10,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271414740] [2021-05-06 02:02:10,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271414740] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:02:10,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:02:10,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:02:10,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932196907] [2021-05-06 02:02:10,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:02:10,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:02:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:02:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:02:10,325 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:02:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:02:10,454 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-05-06 02:02:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:02:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 02:02:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:02:10,487 INFO L225 Difference]: With dead ends: 51 [2021-05-06 02:02:10,487 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:02:10,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:02:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:02:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:02:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:02:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 02:02:10,570 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-06 02:02:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:02:10,570 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 02:02:10,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:02:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 02:02:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 02:02:10,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:02:10,572 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:02:10,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:02:10,572 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:02:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:02:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2021-05-06 02:02:10,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:02:10,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329056155] [2021-05-06 02:02:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:02:10,603 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:02:10,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034070944] [2021-05-06 02:02:10,604 INFO L95 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 [2021-05-06 02:02:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:02:10,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:02:10,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:02:10,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:02:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:02:10,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:02:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:02:11,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:02:11,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329056155] [2021-05-06 02:02:11,005 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:02:11,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034070944] [2021-05-06 02:02:11,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034070944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:02:11,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:02:11,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:02:11,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436268536] [2021-05-06 02:02:11,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:02:11,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:02:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:02:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:02:11,013 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:02:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:02:13,250 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 02:02:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:02:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-06 02:02:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:02:13,252 INFO L225 Difference]: With dead ends: 37 [2021-05-06 02:02:13,252 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 02:02:13,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:02:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 02:02:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 02:02:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:02:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-06 02:02:13,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-06 02:02:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:02:13,258 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-06 02:02:13,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:02:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-06 02:02:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 02:02:13,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:02:13,259 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:02:13,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:02:13,477 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:02:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:02:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2021-05-06 02:02:13,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:02:13,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816188321] [2021-05-06 02:02:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:02:13,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:02:13,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210578391] [2021-05-06 02:02:13,502 INFO L95 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 [2021-05-06 02:02:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:02:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:02:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:02:13,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:02:13,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:02:13,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:02:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:02:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:02:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816188321] [2021-05-06 02:02:13,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:02:13,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210578391] [2021-05-06 02:02:13,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210578391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:02:13,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:02:13,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:02:13,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435898838] [2021-05-06 02:02:13,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:02:13,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:02:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:02:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:02:13,854 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:02:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:02:14,109 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-06 02:02:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:02:14,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-06 02:02:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:02:14,110 INFO L225 Difference]: With dead ends: 45 [2021-05-06 02:02:14,111 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 02:02:14,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:02:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 02:02:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 02:02:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:02:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-06 02:02:14,116 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-06 02:02:14,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:02:14,117 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-06 02:02:14,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:02:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-06 02:02:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 02:02:14,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:02:14,118 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:02:14,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:02:14,341 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:02:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:02:14,342 INFO L82 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2021-05-06 02:02:14,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:02:14,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730114654] [2021-05-06 02:02:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:02:14,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:02:14,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445453020] [2021-05-06 02:02:14,366 INFO L95 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 [2021-05-06 02:02:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:02:14,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:02:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:02:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:02:14,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:02:14,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730114654] [2021-05-06 02:02:14,571 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:02:14,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445453020] [2021-05-06 02:02:14,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445453020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:02:14,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:02:14,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:02:14,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96490005] [2021-05-06 02:02:14,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:02:14,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:02:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:02:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:02:14,575 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:02:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:02:14,600 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-06 02:02:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:02:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-06 02:02:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:02:14,602 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:02:14,602 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:02:14,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:02:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:02:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:02:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:02:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 02:02:14,633 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-06 02:02:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:02:14,634 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 02:02:14,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:02:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 02:02:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:02:14,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:02:14,636 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:02:14,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:02:14,850 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:02:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:02:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2021-05-06 02:02:14,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:02:14,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273950713] [2021-05-06 02:02:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:02:14,860 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:02:14,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863381820] [2021-05-06 02:02:14,861 INFO L95 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