/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:22:15,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:22:15,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:22:15,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:22:15,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:22:15,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:22:15,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:22:15,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:22:15,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:22:15,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:22:15,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:22:15,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:22:15,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:22:15,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:22:15,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:22:15,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:22:15,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:22:15,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:22:15,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:22:15,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:22:15,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:22:15,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:22:15,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:22:15,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:22:15,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:22:15,548 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:22:15,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:22:15,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:22:15,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:22:15,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:22:15,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:22:15,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:22:15,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:22:15,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:22:15,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:22:15,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:22:15,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:22:15,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:22:15,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:22:15,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:22:15,857 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:22:15,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-05-06 04:22:15,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5850c44/eb7e75049e764d4e8cda7cf31da7c4d0/FLAG754a20e03 [2021-05-06 04:22:16,264 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:22:16,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-05-06 04:22:16,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5850c44/eb7e75049e764d4e8cda7cf31da7c4d0/FLAG754a20e03 [2021-05-06 04:22:16,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5850c44/eb7e75049e764d4e8cda7cf31da7c4d0 [2021-05-06 04:22:16,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:22:16,705 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:22:16,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:22:16,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:22:16,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:22:16,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:16,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f66fccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16, skipping insertion in model container [2021-05-06 04:22:16,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:16,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:22:16,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:22:16,875 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c[537,550] [2021-05-06 04:22:16,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:22:16,892 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:22:16,944 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c[537,550] [2021-05-06 04:22:16,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:22:16,974 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:22:16,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16 WrapperNode [2021-05-06 04:22:16,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:22:16,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:22:16,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:22:16,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:22:16,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:16,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:16,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:16,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:16,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:17,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:17,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... [2021-05-06 04:22:17,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:22:17,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:22:17,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:22:17,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:22:17,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:22:17,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:22:17,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:22:17,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:22:17,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:22:17,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:22:17,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:22:17,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:22:17,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:22:17,250 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:22:17,250 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:22:17,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:22:17 BoogieIcfgContainer [2021-05-06 04:22:17,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:22:17,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:22:17,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:22:17,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:22:17,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:22:16" (1/3) ... [2021-05-06 04:22:17,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c93ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:22:17, skipping insertion in model container [2021-05-06 04:22:17,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:16" (2/3) ... [2021-05-06 04:22:17,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c93ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:22:17, skipping insertion in model container [2021-05-06 04:22:17,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:22:17" (3/3) ... [2021-05-06 04:22:17,256 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2021-05-06 04:22:17,259 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:22:17,261 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:22:17,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:22:17,283 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:22:17,283 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:22:17,283 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:22:17,283 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:22:17,283 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:22:17,283 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:22:17,283 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:22:17,284 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:22:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:22:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:22:17,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:17,310 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:17,311 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2021-05-06 04:22:17,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:17,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035641650] [2021-05-06 04:22:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:17,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:22:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:22:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:17,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:17,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035641650] [2021-05-06 04:22:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035641650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:17,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:17,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:22:17,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333783534] [2021-05-06 04:22:17,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:22:17,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:17,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:22:17,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:22:17,606 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:17,693 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 04:22:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:22:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:22:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:17,704 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:22:17,704 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:22:17,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:22:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:22:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 04:22:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 04:22:17,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 04:22:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:17,748 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 04:22:17,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 04:22:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 04:22:17,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:17,751 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:17,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:22:17,751 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:17,752 INFO L82 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2021-05-06 04:22:17,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:17,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961411546] [2021-05-06 04:22:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:17,787 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:17,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379356926] [2021-05-06 04:22:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:22:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:17,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:17,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:17,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961411546] [2021-05-06 04:22:17,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379356926] [2021-05-06 04:22:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379356926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:17,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:17,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:22:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952630181] [2021-05-06 04:22:17,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:22:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:22:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:22:17,951 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:22:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:17,959 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 04:22:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:22:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 04:22:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:17,960 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:22:17,960 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:22:17,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:22:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:22:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:22:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 04:22:17,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-06 04:22:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:17,965 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 04:22:17,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:22:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 04:22:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 04:22:17,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:17,966 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:18,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:22:18,183 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:18,184 INFO L82 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2021-05-06 04:22:18,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:18,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674111851] [2021-05-06 04:22:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:18,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:18,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623990561] [2021-05-06 04:22:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:22:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:18,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:18,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:18,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674111851] [2021-05-06 04:22:18,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:18,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623990561] [2021-05-06 04:22:18,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623990561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:18,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:18,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:22:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960628995] [2021-05-06 04:22:18,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:22:18,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:22:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:22:18,312 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:18,347 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 04:22:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:22:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 04:22:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:18,348 INFO L225 Difference]: With dead ends: 38 [2021-05-06 04:22:18,348 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:22:18,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:22:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:22:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-06 04:22:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:22:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 04:22:18,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 04:22:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:18,355 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 04:22:18,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 04:22:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:22:18,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:18,356 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:18,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:18,574 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2021-05-06 04:22:18,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:18,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600873575] [2021-05-06 04:22:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:18,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:18,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197235490] [2021-05-06 04:22:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:22:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:18,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:18,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:18,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600873575] [2021-05-06 04:22:18,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:18,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197235490] [2021-05-06 04:22:18,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197235490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:18,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:18,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 04:22:18,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929502822] [2021-05-06 04:22:18,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:22:18,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:18,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:22:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:22:18,751 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:18,782 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 04:22:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:22:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 04:22:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:18,783 INFO L225 Difference]: With dead ends: 42 [2021-05-06 04:22:18,783 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:22:18,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:22:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:22:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-06 04:22:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:22:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 04:22:18,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2021-05-06 04:22:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:18,802 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 04:22:18,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 04:22:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:22:18,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:18,802 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:19,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:19,019 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2021-05-06 04:22:19,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:19,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051096807] [2021-05-06 04:22:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:19,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:19,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705464369] [2021-05-06 04:22:19,027 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 [2021-05-06 04:22:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:22:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:19,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:19,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:19,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051096807] [2021-05-06 04:22:19,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:19,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705464369] [2021-05-06 04:22:19,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705464369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:19,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:19,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:22:19,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172737577] [2021-05-06 04:22:19,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:22:19,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:22:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:22:19,123 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:19,146 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-06 04:22:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:22:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:22:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:19,147 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:22:19,148 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 04:22:19,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:22:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 04:22:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 04:22:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:22:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-06 04:22:19,152 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-06 04:22:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:19,152 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-06 04:22:19,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-06 04:22:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:22:19,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:19,153 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] [2021-05-06 04:22:19,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:19,371 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:19,371 INFO L82 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2021-05-06 04:22:19,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:19,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068048112] [2021-05-06 04:22:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:19,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:19,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676746421] [2021-05-06 04:22:19,380 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 [2021-05-06 04:22:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:22:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:19,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:19,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:19,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068048112] [2021-05-06 04:22:19,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:19,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676746421] [2021-05-06 04:22:19,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676746421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:19,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:19,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:22:19,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102454165] [2021-05-06 04:22:19,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:22:19,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:22:19,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:22:19,793 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:19,895 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-06 04:22:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:22:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 04:22:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:19,897 INFO L225 Difference]: With dead ends: 55 [2021-05-06 04:22:19,897 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 04:22:19,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:22:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 04:22:19,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-06 04:22:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:22:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 04:22:19,904 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2021-05-06 04:22:19,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:19,905 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 04:22:19,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 04:22:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:22:19,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:19,905 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] [2021-05-06 04:22:20,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:22:20,123 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 1 times [2021-05-06 04:22:20,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:20,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111318530] [2021-05-06 04:22:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:20,131 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:20,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618127251] [2021-05-06 04:22:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:22:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:20,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:20,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:20,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111318530] [2021-05-06 04:22:20,484 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:20,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618127251] [2021-05-06 04:22:20,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618127251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:20,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:20,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:22:20,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188761575] [2021-05-06 04:22:20,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:22:20,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:22:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:22:20,485 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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) [2021-05-06 04:22:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:20,722 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-05-06 04:22:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:22:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 28 [2021-05-06 04:22:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:20,723 INFO L225 Difference]: With dead ends: 57 [2021-05-06 04:22:20,723 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 04:22:20,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:22:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 04:22:20,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-05-06 04:22:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:22:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-06 04:22:20,728 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-06 04:22:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:20,728 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-06 04:22:20,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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) [2021-05-06 04:22:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-06 04:22:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 04:22:20,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:20,729 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:20,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:20,930 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2021-05-06 04:22:20,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:20,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030463017] [2021-05-06 04:22:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:20,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:20,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624926422] [2021-05-06 04:22:20,937 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 [2021-05-06 04:22:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:20,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:22:20,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:21,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:21,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:22:21,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:21,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030463017] [2021-05-06 04:22:21,095 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:21,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624926422] [2021-05-06 04:22:21,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624926422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:21,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:21,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:22:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404092851] [2021-05-06 04:22:21,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:22:21,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:22:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:22:21,097 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)