/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/sqrt1-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:11:45,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:11:45,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:11:45,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:11:45,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:11:45,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:11:45,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:11:45,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:11:45,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:11:45,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:11:45,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:11:45,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:11:45,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:11:45,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:11:45,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:11:45,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:11:45,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:11:45,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:11:45,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:11:45,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:11:45,410 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 05:11:45,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:11:45,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:11:45,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:11:45,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:11:45,439 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:11:45,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:11:45,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:11:45,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:11:45,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:11:45,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:11:45,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:11:45,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:11:45,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:11:45,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:11:45,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:11:45,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:11:45,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:11:45,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:11:45,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:11:45,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:11:45,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:11:45,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:11:45,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:11:45,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:11:45,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:11:45,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:11:45,704 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:11:45,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2021-05-06 05:11:45,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d881c67d8/defc89757cf64ae5b2405daa7609403a/FLAG705c43fb7 [2021-05-06 05:11:46,125 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:11:46,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2021-05-06 05:11:46,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d881c67d8/defc89757cf64ae5b2405daa7609403a/FLAG705c43fb7 [2021-05-06 05:11:46,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d881c67d8/defc89757cf64ae5b2405daa7609403a [2021-05-06 05:11:46,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:11:46,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:11:46,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:11:46,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:11:46,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:11:46,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641fe10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46, skipping insertion in model container [2021-05-06 05:11:46,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:11:46,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:11:46,293 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/sqrt1-ll_valuebound2.c[520,533] [2021-05-06 05:11:46,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:11:46,313 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:11:46,330 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/sqrt1-ll_valuebound2.c[520,533] [2021-05-06 05:11:46,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:11:46,368 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:11:46,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46 WrapperNode [2021-05-06 05:11:46,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:11:46,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:11:46,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:11:46,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:11:46,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (1/1) ... [2021-05-06 05:11:46,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:11:46,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:11:46,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:11:46,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:11:46,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (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 05:11:46,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:11:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:11:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:11:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:11:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:11:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:11:46,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:11:46,459 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:11:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:11:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:11:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:11:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:11:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:11:46,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:11:46,641 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:11:46,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:46 BoogieIcfgContainer [2021-05-06 05:11:46,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:11:46,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:11:46,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:11:46,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:11:46,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:11:46" (1/3) ... [2021-05-06 05:11:46,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e841e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:46, skipping insertion in model container [2021-05-06 05:11:46,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:46" (2/3) ... [2021-05-06 05:11:46,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e841e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:46, skipping insertion in model container [2021-05-06 05:11:46,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:46" (3/3) ... [2021-05-06 05:11:46,657 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound2.c [2021-05-06 05:11:46,675 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:11:46,677 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:11:46,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:11:46,702 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:11:46,702 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:11:46,702 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:11:46,702 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:11:46,702 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:11:46,702 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:11:46,702 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:11:46,702 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:11:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:11:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:11:46,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:46,715 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 05:11:46,715 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-06 05:11:46,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:46,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286476173] [2021-05-06 05:11:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:46,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:46,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:11:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:46,956 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 05:11:46,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286476173] [2021-05-06 05:11:46,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286476173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:46,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:46,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:11:46,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561672458] [2021-05-06 05:11:46,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:11:46,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:46,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:11:46,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:46,971 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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 05:11:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:47,067 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-06 05:11:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:11:47,068 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 05:11:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:47,073 INFO L225 Difference]: With dead ends: 53 [2021-05-06 05:11:47,073 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 05:11:47,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 05:11:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 05:11:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:11:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 05:11:47,108 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 05:11:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:47,109 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 05:11:47,109 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 05:11:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 05:11:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:11:47,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:47,111 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 05:11:47,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:11:47,112 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-06 05:11:47,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:47,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784386005] [2021-05-06 05:11:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:47,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:47,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:11:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:47,258 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 05:11:47,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:47,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784386005] [2021-05-06 05:11:47,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784386005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:47,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:47,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:11:47,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333944146] [2021-05-06 05:11:47,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:47,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:47,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:47,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:47,261 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 05:11:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:47,539 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 05:11:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:47,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 17 [2021-05-06 05:11:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:47,540 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:11:47,540 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 05:11:47,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 05:11:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-06 05:11:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:11:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 05:11:47,549 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-06 05:11:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:47,549 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 05:11:47,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 05:11:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 05:11:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:11:47,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:47,550 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] [2021-05-06 05:11:47,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:11:47,550 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2021-05-06 05:11:47,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:47,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176836644] [2021-05-06 05:11:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:47,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:47,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004887042] [2021-05-06 05:11:47,558 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 05:11:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:47,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:47,736 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 05:11:47,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:47,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176836644] [2021-05-06 05:11:47,736 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:47,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004887042] [2021-05-06 05:11:47,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004887042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:47,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:47,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136182077] [2021-05-06 05:11:47,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:47,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:47,740 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:47,778 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:11:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:11:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:47,780 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:11:47,780 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 05:11:47,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 05:11:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 05:11:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-05-06 05:11:47,787 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2021-05-06 05:11:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:47,787 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-05-06 05:11:47,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-05-06 05:11:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 05:11:47,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:47,788 INFO L523 BasicCegarLoop]: trace histogram [3, 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 05:11:48,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 05:11:48,011 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2021-05-06 05:11:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:48,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947248210] [2021-05-06 05:11:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:48,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:48,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743445299] [2021-05-06 05:11:48,021 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 05:11:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:48,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:11:48,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:48,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947248210] [2021-05-06 05:11:48,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:48,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743445299] [2021-05-06 05:11:48,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743445299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:48,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:48,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:48,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310198472] [2021-05-06 05:11:48,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:48,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:48,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:48,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:48,173 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:48,211 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-05-06 05:11:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 05:11:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:48,212 INFO L225 Difference]: With dead ends: 48 [2021-05-06 05:11:48,212 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 05:11:48,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 05:11:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 05:11:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:11:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-06 05:11:48,218 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2021-05-06 05:11:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:48,219 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-06 05:11:48,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-06 05:11:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 05:11:48,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:48,219 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 05:11:48,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:48,439 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2021-05-06 05:11:48,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:48,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587258660] [2021-05-06 05:11:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:48,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:48,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667235598] [2021-05-06 05:11:48,446 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 05:11:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:48,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:11:48,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:48,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:11:48,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587258660] [2021-05-06 05:11:48,590 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667235598] [2021-05-06 05:11:48,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667235598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:48,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:48,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007450394] [2021-05-06 05:11:48,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:48,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:48,591 INFO L87 Difference]: Start difference. First operand 43 states and 48 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 05:11:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:48,652 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-06 05:11:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:48,653 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 05:11:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:48,654 INFO L225 Difference]: With dead ends: 57 [2021-05-06 05:11:48,655 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 05:11:48,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 05:11:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 05:11:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 05:11:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 05:11:48,677 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2021-05-06 05:11:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:48,677 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 05:11:48,677 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 05:11:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 05:11:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 05:11:48,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:48,680 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:48,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:48,893 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:48,893 INFO L82 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2021-05-06 05:11:48,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:48,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82185681] [2021-05-06 05:11:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:48,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:48,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079508310] [2021-05-06 05:11:48,899 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 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 05:11:48,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:48,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:48,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:11:49,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:49,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82185681] [2021-05-06 05:11:49,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:49,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079508310] [2021-05-06 05:11:49,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079508310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:49,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:49,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:49,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274081675] [2021-05-06 05:11:49,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:49,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:49,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:49,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:49,044 INFO L87 Difference]: Start difference. First operand 53 states and 62 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:49,113 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-06 05:11:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:49,114 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-06 05:11:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:49,115 INFO L225 Difference]: With dead ends: 61 [2021-05-06 05:11:49,115 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 05:11:49,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 05:11:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 05:11:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:11:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-06 05:11:49,125 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 39 [2021-05-06 05:11:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:49,125 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-06 05:11:49,125 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-06 05:11:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 05:11:49,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:49,127 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:49,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:49,335 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2021-05-06 05:11:49,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:49,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843221615] [2021-05-06 05:11:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:49,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:49,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320043935] [2021-05-06 05:11:49,342 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 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 05:11:49,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:11:49,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:49,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:49,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:11:49,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843221615] [2021-05-06 05:11:49,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320043935] [2021-05-06 05:11:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320043935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:49,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:49,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:49,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21504448] [2021-05-06 05:11:49,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:49,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:49,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:49,472 INFO L87 Difference]: Start difference. First operand 58 states and 67 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:49,526 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-05-06 05:11:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:49,526 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 05:11:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:49,527 INFO L225 Difference]: With dead ends: 65 [2021-05-06 05:11:49,527 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 05:11:49,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 05:11:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 05:11:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:11:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 05:11:49,534 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2021-05-06 05:11:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:49,534 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 05:11:49,534 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 05:11:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 05:11:49,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:49,535 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:49,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:11:49,749 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash -463567166, now seen corresponding path program 4 times [2021-05-06 05:11:49,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:49,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993645716] [2021-05-06 05:11:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:49,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:49,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911897226] [2021-05-06 05:11:49,755 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 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 05:11:49,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:11:49,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 05:11:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:49,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 05:11:49,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:49,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993645716] [2021-05-06 05:11:49,981 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:49,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911897226] [2021-05-06 05:11:49,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911897226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:49,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:49,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:49,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572883847] [2021-05-06 05:11:49,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:49,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:49,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:49,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:49,982 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:11:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:50,033 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-05-06 05:11:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-06 05:11:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:50,034 INFO L225 Difference]: With dead ends: 60 [2021-05-06 05:11:50,034 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:11:50,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:11:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:11:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:11:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:11:50,035 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-05-06 05:11:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:50,035 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:11:50,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:11:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:11:50,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:11:50,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:50,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:11:50,790 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-06 05:11:50,790 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-06 05:11:50,790 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-06 05:11:50,790 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:50,790 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 05:11:50,790 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:50,790 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:50,790 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 05:11:50,790 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:11:50,790 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:50,790 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-06 05:11:50,791 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-06 05:11:50,791 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:50,791 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:50,791 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:11:50,791 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 2))) (or (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~a~0 1) (= main_~s~0 4)))) [2021-05-06 05:11:50,791 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 2))) (or (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~a~0 1) (= main_~s~0 4)))) [2021-05-06 05:11:50,791 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2021-05-06 05:11:50,791 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-06 05:11:50,791 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2021-05-06 05:11:50,791 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4))) [2021-05-06 05:11:50,792 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 2))) (or (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~a~0 1) (= main_~s~0 4)))) [2021-05-06 05:11:50,792 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2021-05-06 05:11:50,792 INFO L194 CegarLoopUtils]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 2))) (or (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~a~0 1) (= main_~s~0 4)))) [2021-05-06 05:11:50,792 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4))) [2021-05-06 05:11:50,792 INFO L201 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-05-06 05:11:50,792 INFO L198 CegarLoopUtils]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-05-06 05:11:50,792 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-06 05:11:50,792 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-06 05:11:50,792 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-06 05:11:50,792 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-06 05:11:50,792 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:50,793 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:50,793 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-06 05:11:50,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:11:50 BoogieIcfgContainer [2021-05-06 05:11:50,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:11:50,802 INFO L168 Benchmark]: Toolchain (without parser) took 4647.86 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 170.3 MB in the beginning and 187.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 129.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:50,802 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 207.6 MB. Free memory is still 187.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:11:50,803 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.53 ms. Allocated memory is still 207.6 MB. Free memory was 170.1 MB in the beginning and 189.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:50,803 INFO L168 Benchmark]: Boogie Preprocessor took 39.47 ms. Allocated memory is still 207.6 MB. Free memory was 189.0 MB in the beginning and 187.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:50,803 INFO L168 Benchmark]: RCFGBuilder took 232.36 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 173.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:50,803 INFO L168 Benchmark]: TraceAbstraction took 4158.70 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 172.9 MB in the beginning and 187.5 MB in the end (delta: -14.6 MB). Peak memory consumption was 131.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:50,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 207.6 MB. Free memory is still 187.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 211.53 ms. Allocated memory is still 207.6 MB. Free memory was 170.1 MB in the beginning and 189.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.47 ms. Allocated memory is still 207.6 MB. Free memory was 189.0 MB in the beginning and 187.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 232.36 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 173.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4158.70 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 172.9 MB in the beginning and 187.5 MB in the end (delta: -14.6 MB). Peak memory consumption was 131.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3549.0ms, OverallIterations: 8, TraceHistogramMax: 7, EmptinessCheckTime: 12.8ms, AutomataDifference: 720.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 540.1ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 249 SDtfs, 74 SDslu, 619 SDs, 0 SdLazy, 328 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 327.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 311.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=7, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 81.2ms AutomataMinimizationTime, 8 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 37 PreInvPairs, 51 NumberOfFragments, 260 HoareAnnotationTreeSize, 37 FomulaSimplifications, 845 FormulaSimplificationTreeSizeReduction, 97.7ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 813 FormulaSimplificationTreeSizeReductionInter, 434.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 52.7ms SsaConstructionTime, 158.0ms SatisfiabilityAnalysisTime, 904.9ms InterpolantComputationTime, 251 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 243 ConstructedInterpolants, 0 QuantifiedInterpolants, 696 SizeOfPredicates, 10 NumberOfNonLiveVariables, 781 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 186/200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((0 <= n && n <= 2) && a == 0) && a * 2 + 1 == t) && s == 1) || ((((0 <= n && s == t + 1) && n <= 2) && a == 1) && s == 4) RESULT: Ultimate proved your program to be correct! Received shutdown request...