/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/fermat2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:43:27,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:43:27,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:43:27,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:43:27,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:43:27,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:43:27,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:43:27,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:43:27,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:43:27,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:43:27,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:43:27,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:43:27,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:43:27,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:43:27,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:43:27,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:43:27,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:43:27,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:43:27,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:43:27,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:43:27,509 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 13:43:27,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:43:27,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:43:27,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:43:27,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:43:27,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:43:27,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:43:27,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:43:27,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:43:27,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:43:27,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:43:27,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:43:27,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:43:27,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:43:27,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:43:27,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:43:27,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:43:27,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:43:27,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:43:27,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:43:27,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:43:27,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:43:27,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:43:27,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:43:27,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:43:27,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:43:27,794 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:43:27,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2-ll.c [2021-05-02 13:43:27,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b931854bf/c120252b8b104a1ab4d72056962f4ea4/FLAGf00f9abcb [2021-05-02 13:43:28,215 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:43:28,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2-ll.c [2021-05-02 13:43:28,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b931854bf/c120252b8b104a1ab4d72056962f4ea4/FLAGf00f9abcb [2021-05-02 13:43:28,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b931854bf/c120252b8b104a1ab4d72056962f4ea4 [2021-05-02 13:43:28,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:43:28,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:43:28,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:28,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:43:28,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:43:28,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312e20f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28, skipping insertion in model container [2021-05-02 13:43:28,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:43:28,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:43:28,375 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/fermat2-ll.c[524,537] [2021-05-02 13:43:28,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:28,390 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:43:28,410 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/fermat2-ll.c[524,537] [2021-05-02 13:43:28,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:28,438 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:43:28,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28 WrapperNode [2021-05-02 13:43:28,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:28,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:43:28,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:43:28,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:43:28,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (1/1) ... [2021-05-02 13:43:28,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:43:28,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:43:28,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:43:28,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:43:28,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (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 13:43:28,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:43:28,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:43:28,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:43:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:43:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:43:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:43:28,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:43:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:43:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:43:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:43:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:43:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:43:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:43:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:43:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:43:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:43:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:43:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:43:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:43:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:43:28,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:43:28,776 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:43:28,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:28 BoogieIcfgContainer [2021-05-02 13:43:28,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:43:28,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:43:28,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:43:28,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:43:28,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:43:28" (1/3) ... [2021-05-02 13:43:28,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e09901f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:28, skipping insertion in model container [2021-05-02 13:43:28,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:28" (2/3) ... [2021-05-02 13:43:28,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e09901f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:28, skipping insertion in model container [2021-05-02 13:43:28,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:28" (3/3) ... [2021-05-02 13:43:28,783 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll.c [2021-05-02 13:43:28,799 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:43:28,802 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:43:28,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:43:28,830 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:43:28,830 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:43:28,830 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:43:28,830 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:43:28,830 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:43:28,830 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:43:28,830 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:43:28,830 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:43:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:43:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:43:28,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:28,846 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:28,846 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash -786972844, now seen corresponding path program 1 times [2021-05-02 13:43:28,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:28,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27574844] [2021-05-02 13:43:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:28,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:28,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855595624] [2021-05-02 13:43:28,919 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 13:43:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 13:43:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:43:29,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:29,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27574844] [2021-05-02 13:43:29,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:29,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855595624] [2021-05-02 13:43:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855595624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:43:29,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:43:29,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 13:43:29,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149398092] [2021-05-02 13:43:29,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 13:43:29,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:29,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 13:43:29,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 13:43:29,136 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:29,149 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-02 13:43:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 13:43:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:43:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:29,154 INFO L225 Difference]: With dead ends: 51 [2021-05-02 13:43:29,155 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 13:43:29,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 13:43:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 13:43:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 13:43:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:43:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 13:43:29,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 13:43:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:29,180 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 13:43:29,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 13:43:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:43:29,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:29,181 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:29,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 13:43:29,393 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1131020600, now seen corresponding path program 1 times [2021-05-02 13:43:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:29,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94504101] [2021-05-02 13:43:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:29,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:29,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450181924] [2021-05-02 13:43:29,405 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 13:43:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:29,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:43:29,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:29,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:29,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:29,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:43:29,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:29,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94504101] [2021-05-02 13:43:29,793 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:29,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450181924] [2021-05-02 13:43:29,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450181924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:43:29,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:43:29,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:43:29,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417177806] [2021-05-02 13:43:29,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:43:29,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:43:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:43:29,798 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:48,512 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 13:43:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:43:48,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:43:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:48,514 INFO L225 Difference]: With dead ends: 35 [2021-05-02 13:43:48,514 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 13:43:48,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:43:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 13:43:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-05-02 13:43:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:43:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 13:43:48,524 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2021-05-02 13:43:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:48,525 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 13:43:48,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 13:43:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:43:48,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:48,531 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 13:43:48,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:48,750 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1991967029, now seen corresponding path program 1 times [2021-05-02 13:43:48,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:48,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756870821] [2021-05-02 13:43:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:48,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:48,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304694483] [2021-05-02 13:43:48,765 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 13:43:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:48,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:43:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:43:49,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:49,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756870821] [2021-05-02 13:43:49,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:49,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304694483] [2021-05-02 13:43:49,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304694483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:43:49,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:43:49,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:43:49,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218882635] [2021-05-02 13:43:49,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:43:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:43:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:43:49,184 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:44:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:13,441 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-05-02 13:44:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:44:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 13:44:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:13,444 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:44:13,444 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 13:44:13,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:44:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 13:44:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 13:44:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:44:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 13:44:13,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 28 [2021-05-02 13:44:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:13,449 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 13:44:13,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:44:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 13:44:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 13:44:13,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:13,453 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:13,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:13,653 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash -380776562, now seen corresponding path program 1 times [2021-05-02 13:44:13,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:13,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959304984] [2021-05-02 13:44:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:13,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:13,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942821389] [2021-05-02 13:44:13,663 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 13:44:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:44:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:13,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:13,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:13,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:13,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:30,211 WARN L205 SmtUtils]: Spent 14.32 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 13:45:18,269 WARN L205 SmtUtils]: Spent 39.52 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 13:45:18,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:18,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:45:18,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:18,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959304984] [2021-05-02 13:45:18,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:45:18,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942821389] [2021-05-02 13:45:18,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942821389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:45:18,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:45:18,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:45:18,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89321045] [2021-05-02 13:45:18,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:45:18,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:45:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 13:45:18,327 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:46:11,462 WARN L205 SmtUtils]: Spent 28.37 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 13:46:45,047 WARN L205 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:47:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:47:05,304 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-02 13:47:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:47:05,305 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 13:47:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:47:05,306 INFO L225 Difference]: With dead ends: 41 [2021-05-02 13:47:05,306 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:47:05,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 122232.7ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 13:47:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:47:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-05-02 13:47:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:47:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-05-02 13:47:05,312 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2021-05-02 13:47:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:47:05,312 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-05-02 13:47:05,312 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:47:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-05-02 13:47:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 13:47:05,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:47:05,313 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:47:05,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:47:05,514 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:47:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:47:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -438034864, now seen corresponding path program 1 times [2021-05-02 13:47:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:47:05,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484265682] [2021-05-02 13:47:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:47:05,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:47:05,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241037711] [2021-05-02 13:47:05,523 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 13:47:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:47:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:47:05,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:47:05,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:47:05,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:47:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484265682] [2021-05-02 13:47:05,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:47:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241037711] [2021-05-02 13:47:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241037711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:47:05,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:47:05,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:47:05,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516982495] [2021-05-02 13:47:05,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:47:05,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:47:05,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:47:05,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:47:05,851 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:47:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:47:19,465 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-05-02 13:47:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:47:19,466 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 13:47:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:47:19,466 INFO L225 Difference]: With dead ends: 45 [2021-05-02 13:47:19,466 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 13:47:19,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:47:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 13:47:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-05-02 13:47:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:47:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-05-02 13:47:19,472 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2021-05-02 13:47:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:47:19,472 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-05-02 13:47:19,473 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:47:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-05-02 13:47:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:47:19,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:47:19,473 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:47:19,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:47:19,677 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:47:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:47:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1239188908, now seen corresponding path program 2 times [2021-05-02 13:47:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:47:19,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462210794] [2021-05-02 13:47:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:47:19,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:47:19,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675138219] [2021-05-02 13:47:19,686 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 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 13:47:19,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:47:19,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:47:19,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:47:19,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:47:19,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:19,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:20,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:20,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:20,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:20,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:20,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:26,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:47:29,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:47:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462210794] [2021-05-02 13:47:29,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:47:29,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675138219] [2021-05-02 13:47:29,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675138219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:47:29,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:47:29,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:47:29,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569885891] [2021-05-02 13:47:29,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:47:29,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:47:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:47:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=127, Unknown=4, NotChecked=0, Total=156 [2021-05-02 13:47:29,562 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:47:58,772 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 13:48:03,150 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 13:48:32,145 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:48:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:40,723 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-05-02 13:48:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:48:40,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-05-02 13:48:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:40,725 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:48:40,725 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 13:48:40,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 27039.5ms TimeCoverageRelationStatistics Valid=58, Invalid=312, Unknown=10, NotChecked=0, Total=380 [2021-05-02 13:48:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 13:48:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 13:48:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:48:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-05-02 13:48:40,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 38 [2021-05-02 13:48:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:40,732 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-05-02 13:48:40,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:48:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-05-02 13:48:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:48:40,733 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:40,733 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:40,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:40,946 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1296447210, now seen corresponding path program 1 times [2021-05-02 13:48:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:40,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403693964] [2021-05-02 13:48:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:40,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188052608] [2021-05-02 13:48:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:41,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:48:41,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:41,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:41,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:02,895 WARN L205 SmtUtils]: Spent 21.69 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 13:49:02,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:02,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:02,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:02,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:02,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:13,033 WARN L205 SmtUtils]: Spent 10.10 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 13:49:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:13,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:13,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,803 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 13:49:28,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:28,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,264 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:49:31,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 1 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:49:35,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:49:35,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403693964] [2021-05-02 13:49:35,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:49:35,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188052608] [2021-05-02 13:49:35,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188052608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:49:35,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:49:35,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 13:49:35,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259994416] [2021-05-02 13:49:35,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:49:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:49:35,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:49:35,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=171, Unknown=7, NotChecked=0, Total=210 [2021-05-02 13:49:35,674 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:50:03,060 WARN L205 SmtUtils]: Spent 4.62 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 13:50:09,944 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 13:50:34,812 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 13:50:56,051 WARN L205 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 13:51:06,518 WARN L205 SmtUtils]: Spent 3.93 s on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:51:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:08,753 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-05-02 13:51:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:51:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-05-02 13:51:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:08,755 INFO L225 Difference]: With dead ends: 57 [2021-05-02 13:51:08,755 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 13:51:08,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 100907.5ms TimeCoverageRelationStatistics Valid=79, Invalid=451, Unknown=22, NotChecked=0, Total=552 [2021-05-02 13:51:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 13:51:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2021-05-02 13:51:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:51:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-05-02 13:51:08,762 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 38 [2021-05-02 13:51:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:08,762 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-05-02 13:51:08,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:51:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-05-02 13:51:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:51:08,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:08,763 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:08,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:08,979 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:08,979 INFO L82 PathProgramCache]: Analyzing trace with hash -228071658, now seen corresponding path program 2 times [2021-05-02 13:51:08,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:08,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537684575] [2021-05-02 13:51:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:08,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:08,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021255100] [2021-05-02 13:51:08,985 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 13:51:09,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:51:09,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:51:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:09,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 13:51:09,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:09,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537684575] [2021-05-02 13:51:09,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:09,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021255100] [2021-05-02 13:51:09,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021255100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:09,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:09,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 13:51:09,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20035905] [2021-05-02 13:51:09,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:51:09,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:51:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:51:09,149 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:51:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:09,181 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2021-05-02 13:51:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:51:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 13:51:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:09,184 INFO L225 Difference]: With dead ends: 67 [2021-05-02 13:51:09,184 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 13:51:09,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:51:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 13:51:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-02 13:51:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.131578947368421) internal successors, (43), 41 states have internal predecessors, (43), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:51:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-05-02 13:51:09,210 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 38 [2021-05-02 13:51:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:09,210 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-05-02 13:51:09,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:51:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-05-02 13:51:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:51:09,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:09,211 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:09,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 13:51:09,412 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:09,412 INFO L82 PathProgramCache]: Analyzing trace with hash -285329960, now seen corresponding path program 2 times [2021-05-02 13:51:09,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:09,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769154770] [2021-05-02 13:51:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:09,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:09,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200703027] [2021-05-02 13:51:09,419 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:09,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:51:09,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:09,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:51:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:09,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,691 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 13:51:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,137 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 13:51:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:51:12,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:12,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769154770] [2021-05-02 13:51:12,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:12,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200703027] [2021-05-02 13:51:12,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200703027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:12,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:12,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:51:12,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145449800] [2021-05-02 13:51:12,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:51:12,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:51:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:51:12,331 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:51:20,832 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 13:51:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:29,328 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-05-02 13:51:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:51:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-05-02 13:51:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:29,330 INFO L225 Difference]: With dead ends: 73 [2021-05-02 13:51:29,330 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 13:51:29,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3688.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:51:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 13:51:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-05-02 13:51:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 50 states have internal predecessors, (52), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:51:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-05-02 13:51:29,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 38 [2021-05-02 13:51:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:29,337 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-05-02 13:51:29,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:51:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-05-02 13:51:29,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 13:51:29,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:29,338 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:29,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:29,539 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash -56819942, now seen corresponding path program 3 times [2021-05-02 13:51:29,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:29,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340770322] [2021-05-02 13:51:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:29,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:29,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464978170] [2021-05-02 13:51:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:29,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:51:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:51:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:29,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:51:30,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:30,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340770322] [2021-05-02 13:51:30,018 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:30,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464978170] [2021-05-02 13:51:30,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464978170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:30,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:30,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:51:30,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818743294] [2021-05-02 13:51:30,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:51:30,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:30,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:51:30,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:51:30,019 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:51:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:44,115 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-05-02 13:51:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:51:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-02 13:51:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:44,117 INFO L225 Difference]: With dead ends: 79 [2021-05-02 13:51:44,117 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 13:51:44,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:51:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 13:51:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-05-02 13:51:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:51:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-05-02 13:51:44,125 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 46 [2021-05-02 13:51:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:44,126 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-05-02 13:51:44,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:51:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-05-02 13:51:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 13:51:44,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:44,127 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:44,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:44,333 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -114078244, now seen corresponding path program 3 times [2021-05-02 13:51:44,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:44,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825217279] [2021-05-02 13:51:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:44,339 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:44,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747477910] [2021-05-02 13:51:44,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:44,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:51:44,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:51:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:44,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 13:51:44,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:44,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825217279] [2021-05-02 13:51:44,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:44,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747477910] [2021-05-02 13:51:44,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747477910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:44,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:44,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:51:44,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644834743] [2021-05-02 13:51:44,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:51:44,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:44,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:51:44,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:51:44,556 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:51:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:57,020 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-05-02 13:51:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:51:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-05-02 13:51:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:57,022 INFO L225 Difference]: With dead ends: 77 [2021-05-02 13:51:57,022 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 13:51:57,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:51:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 13:51:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2021-05-02 13:51:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:51:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-05-02 13:51:57,027 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 46 [2021-05-02 13:51:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:57,028 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-05-02 13:51:57,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:51:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-05-02 13:51:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 13:51:57,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:57,028 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:57,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 13:51:57,238 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash 897039006, now seen corresponding path program 4 times [2021-05-02 13:51:57,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:57,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31181599] [2021-05-02 13:51:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:57,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:57,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514444119] [2021-05-02 13:51:57,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:57,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:51:57,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:57,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:51:57,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:57,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:57,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 24 refuted. 1 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:52:01,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:01,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31181599] [2021-05-02 13:52:01,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:01,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514444119] [2021-05-02 13:52:01,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514444119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:01,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:01,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 13:52:01,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110667768] [2021-05-02 13:52:01,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:52:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:01,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:52:01,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=178, Unknown=2, NotChecked=0, Total=210 [2021-05-02 13:52:01,901 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 13:53:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:11,279 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-05-02 13:53:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:53:11,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2021-05-02 13:53:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:11,280 INFO L225 Difference]: With dead ends: 83 [2021-05-02 13:53:11,280 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 13:53:11,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4784.5ms TimeCoverageRelationStatistics Valid=49, Invalid=291, Unknown=2, NotChecked=0, Total=342 [2021-05-02 13:53:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 13:53:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-05-02 13:53:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:53:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-02 13:53:11,288 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 46 [2021-05-02 13:53:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:11,288 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-02 13:53:11,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 13:53:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-02 13:53:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 13:53:11,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:11,289 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:11,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:11,504 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:11,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:11,504 INFO L82 PathProgramCache]: Analyzing trace with hash 735442590, now seen corresponding path program 5 times [2021-05-02 13:53:11,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:11,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305004551] [2021-05-02 13:53:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:11,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:11,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733721030] [2021-05-02 13:53:11,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:11,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-02 13:53:11,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:53:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:53:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:11,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,680 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 13:53:13,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:13,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 15 refuted. 4 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:53:21,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305004551] [2021-05-02 13:53:21,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733721030] [2021-05-02 13:53:21,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733721030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:21,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:21,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:53:21,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568567357] [2021-05-02 13:53:21,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:53:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:53:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=82, Unknown=4, NotChecked=0, Total=110 [2021-05-02 13:53:21,966 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:55:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:55:25,520 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-05-02 13:55:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:55:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2021-05-02 13:55:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:55:25,522 INFO L225 Difference]: With dead ends: 93 [2021-05-02 13:55:25,522 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 13:55:25,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 10254.6ms TimeCoverageRelationStatistics Valid=35, Invalid=117, Unknown=4, NotChecked=0, Total=156 [2021-05-02 13:55:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 13:55:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-05-02 13:55:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.096774193548387) internal successors, (68), 65 states have internal predecessors, (68), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 13:55:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-05-02 13:55:25,531 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 46 [2021-05-02 13:55:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:55:25,531 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-05-02 13:55:25,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:55:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-05-02 13:55:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 13:55:25,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:55:25,532 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:55:25,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 13:55:25,737 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:55:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:55:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 678184288, now seen corresponding path program 3 times [2021-05-02 13:55:25,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:55:25,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673358358] [2021-05-02 13:55:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:55:25,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:55:25,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505894922] [2021-05-02 13:55:25,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:55:25,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:55:25,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:55:25,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:55:25,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:55:25,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:25,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 13:55:25,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:55:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673358358] [2021-05-02 13:55:25,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:55:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505894922] [2021-05-02 13:55:25,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505894922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:55:25,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:55:25,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:55:25,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623057177] [2021-05-02 13:55:25,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:55:25,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:55:25,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:55:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:55:25,937 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 13:55:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:55:30,052 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-05-02 13:55:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:55:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2021-05-02 13:55:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:55:30,053 INFO L225 Difference]: With dead ends: 97 [2021-05-02 13:55:30,053 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 13:55:30,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:55:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 13:55:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2021-05-02 13:55:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:55:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-05-02 13:55:30,061 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 46 [2021-05-02 13:55:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:55:30,061 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-05-02 13:55:30,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 13:55:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-05-02 13:55:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 13:55:30,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:55:30,062 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:55:30,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:55:30,269 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:55:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:55:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -545696412, now seen corresponding path program 6 times [2021-05-02 13:55:30,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:55:30,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705032056] [2021-05-02 13:55:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:55:30,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:55:30,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057935967] [2021-05-02 13:55:30,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:55:30,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-02 13:55:30,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:55:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:55:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:55:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:30,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:35,258 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 13:55:45,543 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 13:55:45,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:45,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:55:45,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:55:45,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705032056] [2021-05-02 13:55:45,871 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:55:45,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057935967] [2021-05-02 13:55:45,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057935967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:55:45,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:55:45,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:55:45,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462701937] [2021-05-02 13:55:45,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:55:45,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:55:45,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:55:45,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=128, Unknown=3, NotChecked=0, Total=156 [2021-05-02 13:55:45,872 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 13:56:27,700 WARN L205 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 13:56:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:56:55,865 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2021-05-02 13:56:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:56:55,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2021-05-02 13:56:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:56:55,867 INFO L225 Difference]: With dead ends: 101 [2021-05-02 13:56:55,867 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 13:56:55,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 21557.3ms TimeCoverageRelationStatistics Valid=58, Invalid=318, Unknown=4, NotChecked=0, Total=380 [2021-05-02 13:56:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 13:56:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-05-02 13:56:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.105263157894737) internal successors, (63), 61 states have internal predecessors, (63), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 13:56:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-05-02 13:56:55,878 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 54 [2021-05-02 13:56:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:56:55,878 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-05-02 13:56:55,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 13:56:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-05-02 13:56:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 13:56:55,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:56:55,879 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:56:56,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:56:56,084 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:56:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:56:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1579445916, now seen corresponding path program 7 times [2021-05-02 13:56:56,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:56:56,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127418315] [2021-05-02 13:56:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:56:56,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:56:56,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150471058] [2021-05-02 13:56:56,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:56:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:56:56,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:56:56,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:56:56,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 13:56:56,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:56:56,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127418315] [2021-05-02 13:56:56,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:56:56,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150471058] [2021-05-02 13:56:56,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150471058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:56:56,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:56:56,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:56:56,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812473458] [2021-05-02 13:56:56,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:56:56,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:56:56,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:56:56,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:56:56,435 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 13:56:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:56:56,705 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2021-05-02 13:56:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:56:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2021-05-02 13:56:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:56:56,707 INFO L225 Difference]: With dead ends: 109 [2021-05-02 13:56:56,707 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 13:56:56,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:56:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 13:56:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-05-02 13:56:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 67 states have internal predecessors, (70), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 13:56:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2021-05-02 13:56:56,718 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 54 [2021-05-02 13:56:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:56:56,718 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2021-05-02 13:56:56,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 13:56:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2021-05-02 13:56:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 13:56:56,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:56:56,719 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:56:56,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:56:56,933 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:56:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:56:56,933 INFO L82 PathProgramCache]: Analyzing trace with hash 231509546, now seen corresponding path program 8 times [2021-05-02 13:56:56,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:56:56,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736139585] [2021-05-02 13:56:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:56:56,941 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:56:56,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567435248] [2021-05-02 13:56:56,941 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:56:57,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:56:57,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:56:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 13:56:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:56:57,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:57,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:57,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:56:57,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:07,247 WARN L205 SmtUtils]: Spent 8.07 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 13:57:25,511 WARN L205 SmtUtils]: Spent 9.60 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 13:57:25,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:25,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:48,201 WARN L205 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 13:57:48,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:48,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:48,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:14,545 WARN L205 SmtUtils]: Spent 4.86 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 13:58:14,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:14,563 WARN L159 QuantifierPusher]: Ignoring assumption.