/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/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:25:14,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:25:14,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:25:14,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:25:14,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:25:14,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:25:14,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:25:14,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:25:14,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:25:14,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:25:14,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:25:14,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:25:14,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:25:14,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:25:14,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:25:14,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:25:14,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:25:14,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:25:14,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:25:14,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:25:14,320 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 [2021-05-02 16:25:14,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:25:14,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:25:14,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:25:14,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:25:14,370 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:25:14,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:25:14,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:25:14,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:25:14,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:25:14,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:25:14,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:25:14,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:25:14,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:25:14,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:25:14,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:25:14,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:25:14,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:25:14,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:25:14,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:25:14,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:25:14,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:25:14,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:25:14,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:25:14,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:25:14,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:25:14,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:25:14,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:25:14,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:25:14,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:25:14,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:25:14,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:25:14,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:25:14,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:25:14,703 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:25:14,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-02 16:25:14,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6350349fc/e17a0317472d4d9d87d54a80b78065c0/FLAGceedda0eb [2021-05-02 16:25:15,244 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:25:15,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-02 16:25:15,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6350349fc/e17a0317472d4d9d87d54a80b78065c0/FLAGceedda0eb [2021-05-02 16:25:15,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6350349fc/e17a0317472d4d9d87d54a80b78065c0 [2021-05-02 16:25:15,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:25:15,273 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:25:15,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:25:15,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:25:15,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:25:15,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558c7b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15, skipping insertion in model container [2021-05-02 16:25:15,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:25:15,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:25:15,441 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/prodbin-ll_unwindbound10.c[537,550] [2021-05-02 16:25:15,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:25:15,461 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:25:15,473 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/prodbin-ll_unwindbound10.c[537,550] [2021-05-02 16:25:15,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:25:15,499 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:25:15,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15 WrapperNode [2021-05-02 16:25:15,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:25:15,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:25:15,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:25:15,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:25:15,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (1/1) ... [2021-05-02 16:25:15,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:25:15,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:25:15,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:25:15,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:25:15,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (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 [2021-05-02 16:25:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:25:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:25:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:25:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:25:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:25:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:25:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:25:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:25:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:25:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:25:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:25:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:25:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:25:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:25:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:25:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:25:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:25:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:25:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:25:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:25:15,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:25:15,890 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:25:15,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:25:15 BoogieIcfgContainer [2021-05-02 16:25:15,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:25:15,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:25:15,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:25:15,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:25:15,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:25:15" (1/3) ... [2021-05-02 16:25:15,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4c28e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:25:15, skipping insertion in model container [2021-05-02 16:25:15,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:15" (2/3) ... [2021-05-02 16:25:15,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4c28e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:25:15, skipping insertion in model container [2021-05-02 16:25:15,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:25:15" (3/3) ... [2021-05-02 16:25:15,897 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.c [2021-05-02 16:25:15,902 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:25:15,904 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:25:15,918 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:25:15,935 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:25:15,936 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:25:15,936 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:25:15,936 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:25:15,936 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:25:15,936 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:25:15,936 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:25:15,936 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:25:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-05-02 16:25:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:25:15,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:15,953 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:15,953 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2021-05-02 16:25:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:15,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729304702] [2021-05-02 16:25:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:25:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:25:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:16,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:16,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729304702] [2021-05-02 16:25:16,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729304702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:25:16,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:25:16,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:25:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476177830] [2021-05-02 16:25:16,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:25:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:25:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:25:16,218 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-05-02 16:25:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:16,320 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 16:25:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:25:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2021-05-02 16:25:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:16,328 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:25:16,328 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:25:16,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:25:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:25:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 16:25:16,368 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) [2021-05-02 16:25:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 16:25:16,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 16:25:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:16,372 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 16:25:16,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-05-02 16:25:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 16:25:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:25:16,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:16,374 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:16,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:25:16,374 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2021-05-02 16:25:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:16,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933677469] [2021-05-02 16:25:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:16,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:16,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045325720] [2021-05-02 16:25:16,412 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 [2021-05-02 16:25:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:25:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:16,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:16,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:16,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:16,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:16,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:16,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:16,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933677469] [2021-05-02 16:25:16,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:16,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045325720] [2021-05-02 16:25:16,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045325720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:25:16,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:25:16,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:25:16,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956591254] [2021-05-02 16:25:16,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:25:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:16,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:25:16,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:25:16,665 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:25:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:16,684 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 16:25:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:25:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 16:25:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:16,687 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:25:16,687 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:25:16,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:25:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:25:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:25:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2021-05-02 16:25:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 16:25:16,705 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 16:25:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:16,706 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 16:25:16,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:25:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 16:25:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:25:16,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:16,711 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:16,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:25:16,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:16,938 INFO L82 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2021-05-02 16:25:16,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:16,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227384171] [2021-05-02 16:25:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:16,981 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:16,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947868149] [2021-05-02 16:25:16,981 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 [2021-05-02 16:25:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:25:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:17,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:17,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227384171] [2021-05-02 16:25:17,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:17,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947868149] [2021-05-02 16:25:17,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947868149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:25:17,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:25:17,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 16:25:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559705869] [2021-05-02 16:25:17,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:25:17,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:17,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:25:17,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:25:17,203 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-05-02 16:25:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:17,319 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 16:25:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:25:17,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 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 18 [2021-05-02 16:25:17,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:17,322 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:25:17,322 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:25:17,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:25:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:25:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 16:25:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-05-02 16:25:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 16:25:17,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 16:25:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:17,338 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 16:25:17,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-05-02 16:25:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 16:25:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:25:17,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:17,340 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:17,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:17,561 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:17,562 INFO L82 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2021-05-02 16:25:17,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:17,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918770809] [2021-05-02 16:25:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:17,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:17,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516509680] [2021-05-02 16:25:17,573 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 [2021-05-02 16:25:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:17,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:25:17,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:17,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:17,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:17,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918770809] [2021-05-02 16:25:17,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:17,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516509680] [2021-05-02 16:25:17,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516509680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:25:17,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:25:17,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:25:17,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240905227] [2021-05-02 16:25:17,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:25:17,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:17,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:25:17,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:25:17,743 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:25:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:17,783 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 16:25:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:25:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:25:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:17,785 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:25:17,786 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 16:25:17,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:25:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 16:25:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 16:25:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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) [2021-05-02 16:25:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 16:25:17,798 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 16:25:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:17,799 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 16:25:17,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:25:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 16:25:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:25:17,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:17,800 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] [2021-05-02 16:25:18,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:18,017 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2021-05-02 16:25:18,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:18,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016120026] [2021-05-02 16:25:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:18,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:18,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580178650] [2021-05-02 16:25:18,037 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 [2021-05-02 16:25:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 16:25:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:18,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:18,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016120026] [2021-05-02 16:25:18,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580178650] [2021-05-02 16:25:18,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580178650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:25:18,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:25:18,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:25:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391025019] [2021-05-02 16:25:18,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:25:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:25:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:25:18,507 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:25:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:18,637 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-02 16:25:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:25:18,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:25:18,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:18,639 INFO L225 Difference]: With dead ends: 55 [2021-05-02 16:25:18,640 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 16:25:18,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:25:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 16:25:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 16:25:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 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) [2021-05-02 16:25:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 16:25:18,646 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2021-05-02 16:25:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:18,647 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 16:25:18,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:25:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 16:25:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:25:18,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:18,648 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] [2021-05-02 16:25:18,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:18,853 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 1 times [2021-05-02 16:25:18,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:18,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015370672] [2021-05-02 16:25:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:18,868 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:18,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170249877] [2021-05-02 16:25:18,868 INFO L95 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 [2021-05-02 16:25:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:18,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 16:25:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:19,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:19,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:19,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015370672] [2021-05-02 16:25:19,306 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:19,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170249877] [2021-05-02 16:25:19,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170249877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:25:19,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:25:19,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:25:19,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556664417] [2021-05-02 16:25:19,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:25:19,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:25:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:25:19,311 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:25:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:22,545 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-05-02 16:25:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:25:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:25:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:22,546 INFO L225 Difference]: With dead ends: 57 [2021-05-02 16:25:22,546 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 16:25:22,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:25:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 16:25:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-05-02 16:25:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:25:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 16:25:22,552 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 16:25:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:22,553 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 16:25:22,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:25:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 16:25:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 16:25:22,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:22,554 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:22,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:22,769 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2021-05-02 16:25:22,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:22,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981745588] [2021-05-02 16:25:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:22,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:22,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504479932] [2021-05-02 16:25:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 16:25:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:25:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:22,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:22,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:22,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:22,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:22,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:22,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:22,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:23,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:23,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:25:23,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:23,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981745588] [2021-05-02 16:25:23,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:23,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504479932] [2021-05-02 16:25:23,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504479932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:25:23,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:25:23,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:25:23,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086442950] [2021-05-02 16:25:23,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:25:23,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:23,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:25:23,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:25:23,094 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:25:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:25,302 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-05-02 16:25:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:25:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 16:25:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:25,305 INFO L225 Difference]: With dead ends: 59 [2021-05-02 16:25:25,305 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 16:25:25,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:25:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 16:25:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 16:25:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:25:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 16:25:25,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 16:25:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:25,311 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 16:25:25,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:25:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 16:25:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 16:25:25,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:25,312 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:25,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:25,536 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 2 times [2021-05-02 16:25:25,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:25,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576766414] [2021-05-02 16:25:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:25,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:25,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507379889] [2021-05-02 16:25:25,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-02 16:25:25,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:25:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:25:25,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:25:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:25,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:25,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:25,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576766414] [2021-05-02 16:25:25,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:25,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507379889] [2021-05-02 16:25:25,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507379889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:25:25,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:25:25,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:25:25,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076430582] [2021-05-02 16:25:25,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:25:25,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:25,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:25:25,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:25:25,698 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:25:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:25,744 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-05-02 16:25:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:25:25,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-05-02 16:25:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:25,746 INFO L225 Difference]: With dead ends: 54 [2021-05-02 16:25:25,746 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:25:25,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:25:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:25:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:25:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-05-02 16:25:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 16:25:25,752 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-05-02 16:25:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:25,752 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 16:25:25,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:25:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 16:25:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 16:25:25,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:25,753 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:25,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:25,973 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 2 times [2021-05-02 16:25:25,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:25,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729531792] [2021-05-02 16:25:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:25,981 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:25,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178702986] [2021-05-02 16:25:25,982 INFO L93 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 [2021-05-02 16:25:26,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:25:26,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:25:26,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 16:25:26,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:26,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:26,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:26,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:26,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:34,284 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 16:25:50,272 WARN L205 SmtUtils]: Spent 14.69 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 16:25:58,572 WARN L205 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-02 16:25:58,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:58,823 WARN L159 QuantifierPusher]: Ignoring assumption.