/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:25:28,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:25:28,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:25:28,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:25:28,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:25:28,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:25:28,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:25:28,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:25:28,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:25:28,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:25:28,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:25:28,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:25:28,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:25:28,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:25:28,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:25:28,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:25:28,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:25:28,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:25:28,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:25:28,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:25:28,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 17:25:28,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:25:28,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:25:28,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:25:28,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:25:28,224 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:25:28,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:25:28,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:25:28,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:25:28,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:25:28,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:25:28,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:25:28,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:25:28,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:25:28,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:25:28,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:25:28,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:25:28,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:25:28,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:25:28,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:25:28,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:25:28,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:25:28,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:25:28,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:25:28,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:25:28,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:25:28,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:25:28,605 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:25:28,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2021-05-02 17:25:28,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a36c4a37/583e2997e70d4ddb825ffe96751eb5ed/FLAGffd84c2c9 [2021-05-02 17:25:28,970 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:25:28,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2021-05-02 17:25:28,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a36c4a37/583e2997e70d4ddb825ffe96751eb5ed/FLAGffd84c2c9 [2021-05-02 17:25:28,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a36c4a37/583e2997e70d4ddb825ffe96751eb5ed [2021-05-02 17:25:28,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:25:28,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:25:29,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:25:29,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:25:29,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:25:29,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:25:28" (1/1) ... [2021-05-02 17:25:29,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a34764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29, skipping insertion in model container [2021-05-02 17:25:29,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:25:28" (1/1) ... [2021-05-02 17:25:29,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:25:29,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:25:29,139 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_valuebound20.c[520,533] [2021-05-02 17:25:29,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:25:29,179 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:25:29,206 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_valuebound20.c[520,533] [2021-05-02 17:25:29,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:25:29,237 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:25:29,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29 WrapperNode [2021-05-02 17:25:29,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:25:29,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:25:29,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:25:29,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:25:29,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... [2021-05-02 17:25:29,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... [2021-05-02 17:25:29,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... [2021-05-02 17:25:29,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... [2021-05-02 17:25:29,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... [2021-05-02 17:25:29,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... [2021-05-02 17:25:29,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... [2021-05-02 17:25:29,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:25:29,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:25:29,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:25:29,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:25:29,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:25:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:25:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:25:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:25:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:25:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:25:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:25:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:25:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:25:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:25:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:25:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:25:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:25:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:25:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:25:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:25:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:25:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:25:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:25:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:25:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:25:29,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:25:29,549 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:25:29,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:25:29 BoogieIcfgContainer [2021-05-02 17:25:29,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:25:29,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:25:29,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:25:29,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:25:29,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:25:28" (1/3) ... [2021-05-02 17:25:29,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f40f52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:25:29, skipping insertion in model container [2021-05-02 17:25:29,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:29" (2/3) ... [2021-05-02 17:25:29,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f40f52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:25:29, skipping insertion in model container [2021-05-02 17:25:29,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:25:29" (3/3) ... [2021-05-02 17:25:29,555 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound20.c [2021-05-02 17:25:29,576 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:25:29,578 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:25:29,590 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:25:29,621 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:25:29,622 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:25:29,622 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:25:29,622 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:25:29,622 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:25:29,622 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:25:29,622 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:25:29,622 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:25:29,641 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) [2021-05-02 17:25:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:25:29,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:29,645 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:29,646 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-02 17:25:29,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:29,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766259968] [2021-05-02 17:25:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:29,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:25:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:29,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:25:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:25:29,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:29,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766259968] [2021-05-02 17:25:29,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766259968] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:25:29,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:25:29,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:25:29,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594388824] [2021-05-02 17:25:29,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:25:29,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:25:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:25:29,922 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) [2021-05-02 17:25:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:30,055 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-02 17:25:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:25:30,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:25:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:30,063 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:25:30,063 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:25:30,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:25:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:25:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:25:30,126 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) [2021-05-02 17:25:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 17:25:30,129 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 17:25:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:30,129 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 17:25:30,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:25:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 17:25:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:25:30,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:30,132 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:30,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:25:30,133 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-02 17:25:30,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:30,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549858857] [2021-05-02 17:25:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:30,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:25:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:30,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:25:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:25:30,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:30,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549858857] [2021-05-02 17:25:30,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549858857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:25:30,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:25:30,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:25:30,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036040501] [2021-05-02 17:25:30,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:25:30,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:25:30,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:25:30,276 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) [2021-05-02 17:25:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:30,583 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 17:25:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:25:30,584 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 [2021-05-02 17:25:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:30,584 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:25:30,584 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:25:30,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:25:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 17:25:30,593 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) [2021-05-02 17:25:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 17:25:30,594 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 17:25:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:30,594 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 17:25:30,594 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) [2021-05-02 17:25:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 17:25:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:25:30,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:30,595 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] [2021-05-02 17:25:30,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:25:30,595 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:30,596 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2021-05-02 17:25:30,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:30,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041584322] [2021-05-02 17:25:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:30,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:30,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209138196] [2021-05-02 17:25:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:30,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:25:30,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:25:30,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041584322] [2021-05-02 17:25:30,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209138196] [2021-05-02 17:25:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209138196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:30,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:30,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:30,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500541751] [2021-05-02 17:25:30,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:30,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:30,820 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:25:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:30,969 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 17:25:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:25:30,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 17:25:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:30,971 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:25:30,971 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 17:25:30,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 17:25:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 17:25:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:25:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 17:25:30,978 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 17:25:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:30,978 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 17:25:30,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:25:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 17:25:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:25:30,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:30,979 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] [2021-05-02 17:25:31,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:25:31,196 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2021-05-02 17:25:31,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:31,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338176641] [2021-05-02 17:25:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:31,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:31,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69431673] [2021-05-02 17:25:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:25:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:25:31,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338176641] [2021-05-02 17:25:31,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69431673] [2021-05-02 17:25:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69431673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:31,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:31,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 17:25:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464735918] [2021-05-02 17:25:31,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:25:31,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:25:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:25:31,332 INFO L87 Difference]: Start difference. First operand 39 states and 45 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) [2021-05-02 17:25:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:31,381 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-05-02 17:25:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:25:31,382 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 [2021-05-02 17:25:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:31,383 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:25:31,383 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 17:25:31,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:25:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 17:25:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 17:25:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 17:25:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 17:25:31,390 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 17:25:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:31,391 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 17:25:31,391 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) [2021-05-02 17:25:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 17:25:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:25:31,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:31,392 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] [2021-05-02 17:25:31,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:31,608 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:31,608 INFO L82 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2021-05-02 17:25:31,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:31,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538769814] [2021-05-02 17:25:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:31,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:31,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414952070] [2021-05-02 17:25:31,616 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:31,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:25:31,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:31,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:25:31,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:25:31,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:31,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538769814] [2021-05-02 17:25:31,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:31,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414952070] [2021-05-02 17:25:31,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414952070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:31,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:31,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:31,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059809708] [2021-05-02 17:25:31,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:31,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:31,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:31,820 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:25:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:31,935 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 17:25:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:25:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 17:25:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:31,937 INFO L225 Difference]: With dead ends: 57 [2021-05-02 17:25:31,937 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 17:25:31,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 17:25:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 17:25:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 17:25:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 17:25:31,944 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 17:25:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:31,944 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 17:25:31,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:25:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 17:25:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:25:31,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:31,945 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] [2021-05-02 17:25:32,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:32,159 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2021-05-02 17:25:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:32,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825161412] [2021-05-02 17:25:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:32,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:32,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898651381] [2021-05-02 17:25:32,171 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:32,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 17:25:32,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:25:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:32,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:25:32,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:32,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825161412] [2021-05-02 17:25:32,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:32,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898651381] [2021-05-02 17:25:32,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898651381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:32,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:32,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:32,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099026880] [2021-05-02 17:25:32,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:32,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:32,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:32,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:32,311 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:25:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:32,384 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-02 17:25:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:25:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 17:25:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:32,385 INFO L225 Difference]: With dead ends: 61 [2021-05-02 17:25:32,385 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:25:32,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:32,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:25:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 17:25:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 17:25:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 17:25:32,392 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 17:25:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:32,392 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 17:25:32,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:25:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 17:25:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:25:32,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:32,393 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] [2021-05-02 17:25:32,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:32,609 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash -463567166, now seen corresponding path program 4 times [2021-05-02 17:25:32,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:32,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499896799] [2021-05-02 17:25:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:32,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:32,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615771151] [2021-05-02 17:25:32,617 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:32,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:25:32,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:25:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 17:25:32,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:32,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499896799] [2021-05-02 17:25:32,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:32,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615771151] [2021-05-02 17:25:32,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615771151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:32,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:32,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:25:32,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995295769] [2021-05-02 17:25:32,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:25:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:25:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:25:32,740 INFO L87 Difference]: Start difference. First operand 56 states and 62 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), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:25:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:32,802 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-05-02 17:25:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:25:32,803 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), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 17:25:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:32,803 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:25:32,803 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 17:25:32,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 17:25:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 17:25:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 17:25:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 17:25:32,814 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2021-05-02 17:25:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:32,814 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 17:25:32,815 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), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:25:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 17:25:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 17:25:32,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:32,815 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:33,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:25:33,031 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:33,032 INFO L82 PathProgramCache]: Analyzing trace with hash 790038090, now seen corresponding path program 5 times [2021-05-02 17:25:33,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:33,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637148437] [2021-05-02 17:25:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:33,077 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:33,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619736089] [2021-05-02 17:25:33,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:33,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 17:25:33,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:33,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:25:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 17:25:33,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:33,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637148437] [2021-05-02 17:25:33,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:33,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619736089] [2021-05-02 17:25:33,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619736089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:33,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:33,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:25:33,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883517838] [2021-05-02 17:25:33,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:25:33,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:25:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:25:33,256 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 17:25:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:33,376 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-02 17:25:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:25:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 17:25:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:33,377 INFO L225 Difference]: With dead ends: 74 [2021-05-02 17:25:33,377 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:25:33,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:25:33,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:25:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 17:25:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:25:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 17:25:33,386 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2021-05-02 17:25:33,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:33,386 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 17:25:33,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 17:25:33,386 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 17:25:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:25:33,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:33,387 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:33,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:33,603 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1996886914, now seen corresponding path program 6 times [2021-05-02 17:25:33,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:33,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18385210] [2021-05-02 17:25:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:33,609 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:33,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379939427] [2021-05-02 17:25:33,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:33,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 17:25:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:33,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:25:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 17:25:33,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:33,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18385210] [2021-05-02 17:25:33,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:33,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379939427] [2021-05-02 17:25:33,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379939427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:33,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:33,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:25:33,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819311460] [2021-05-02 17:25:33,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:25:33,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:33,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:25:33,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:25:33,834 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:25:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:33,987 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-02 17:25:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:25:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 17:25:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:33,988 INFO L225 Difference]: With dead ends: 78 [2021-05-02 17:25:33,988 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 17:25:33,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:25:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 17:25:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 17:25:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 17:25:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 17:25:33,995 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2021-05-02 17:25:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:33,996 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 17:25:33,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:25:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 17:25:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:25:33,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:33,997 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:34,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:34,221 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash -415362136, now seen corresponding path program 7 times [2021-05-02 17:25:34,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:34,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59049252] [2021-05-02 17:25:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:34,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:34,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853166365] [2021-05-02 17:25:34,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:25:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 17:25:34,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:34,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59049252] [2021-05-02 17:25:34,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:34,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853166365] [2021-05-02 17:25:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853166365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:34,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:34,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880307339] [2021-05-02 17:25:34,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:34,402 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 17:25:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:34,484 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-05-02 17:25:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:25:34,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-02 17:25:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:34,485 INFO L225 Difference]: With dead ends: 87 [2021-05-02 17:25:34,485 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 17:25:34,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:25:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 17:25:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 17:25:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0625) internal successors, (51), 50 states have internal predecessors, (51), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:25:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-02 17:25:34,493 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 68 [2021-05-02 17:25:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:34,493 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-02 17:25:34,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 17:25:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-02 17:25:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 17:25:34,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:34,494 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:34,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:25:34,710 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:34,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1903584988, now seen corresponding path program 8 times [2021-05-02 17:25:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:34,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922589074] [2021-05-02 17:25:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:34,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:34,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328063759] [2021-05-02 17:25:34,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:34,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:25:34,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:25:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 17:25:34,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:34,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922589074] [2021-05-02 17:25:34,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:34,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328063759] [2021-05-02 17:25:34,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328063759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:34,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:34,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:25:34,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618647931] [2021-05-02 17:25:34,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:25:34,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:34,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:25:34,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:34,973 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 17:25:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:35,151 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-05-02 17:25:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:25:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2021-05-02 17:25:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:35,153 INFO L225 Difference]: With dead ends: 91 [2021-05-02 17:25:35,153 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 17:25:35,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:25:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 17:25:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-02 17:25:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:25:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-05-02 17:25:35,161 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 73 [2021-05-02 17:25:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:35,162 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-05-02 17:25:35,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 17:25:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-05-02 17:25:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 17:25:35,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:35,163 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:35,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:35,379 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2040579864, now seen corresponding path program 9 times [2021-05-02 17:25:35,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:35,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975597234] [2021-05-02 17:25:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:35,402 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:35,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772970431] [2021-05-02 17:25:35,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:35,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 17:25:35,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:35,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:25:35,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:35,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:50,676 WARN L205 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 17:25:50,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:50,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-02 17:25:50,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:50,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975597234] [2021-05-02 17:25:50,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:50,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772970431] [2021-05-02 17:25:50,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772970431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:50,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:50,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:25:50,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962843413] [2021-05-02 17:25:50,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:25:50,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:50,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:25:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2021-05-02 17:25:50,704 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:26:00,951 WARN L205 SmtUtils]: Spent 10.24 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 17:26:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:26:24,732 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-05-02 17:26:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:26:24,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-02 17:26:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:26:24,733 INFO L225 Difference]: With dead ends: 102 [2021-05-02 17:26:24,733 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 17:26:24,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 25217.3ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 17:26:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 17:26:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 17:26:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:26:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-05-02 17:26:24,741 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 78 [2021-05-02 17:26:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:26:24,741 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-05-02 17:26:24,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:26:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-05-02 17:26:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 17:26:24,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:26:24,743 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:26:24,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:26:24,944 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:26:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:26:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2131153022, now seen corresponding path program 10 times [2021-05-02 17:26:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:26:24,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559195458] [2021-05-02 17:26:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:26:24,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:26:24,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457032325] [2021-05-02 17:26:24,949 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:26:25,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:26:25,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:26:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:26:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:26:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 17:26:25,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:26:25,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559195458] [2021-05-02 17:26:25,174 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:26:25,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457032325] [2021-05-02 17:26:25,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457032325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:26:25,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:26:25,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:26:25,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754594128] [2021-05-02 17:26:25,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:26:25,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:26:25,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:26:25,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:26:25,176 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 17:26:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:26:25,284 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-05-02 17:26:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:26:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 17:26:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:26:25,285 INFO L225 Difference]: With dead ends: 110 [2021-05-02 17:26:25,285 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 17:26:25,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:26:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 17:26:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 17:26:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 67 states have internal predecessors, (68), 24 states have call successors, (24), 18 states have call predecessors, (24), 17 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 17:26:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-05-02 17:26:25,293 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 85 [2021-05-02 17:26:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:26:25,293 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-05-02 17:26:25,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 17:26:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-05-02 17:26:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 17:26:25,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:26:25,294 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:26:25,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 17:26:25,510 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:26:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:26:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1485297034, now seen corresponding path program 11 times [2021-05-02 17:26:25,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:26:25,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749643810] [2021-05-02 17:26:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:26:25,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:26:25,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285120498] [2021-05-02 17:26:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:26:25,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 17:26:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:26:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 17:26:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:26:25,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 99 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 17:26:25,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:26:25,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749643810] [2021-05-02 17:26:25,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:26:25,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285120498] [2021-05-02 17:26:25,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285120498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:26:25,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:26:25,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 17:26:25,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270781864] [2021-05-02 17:26:25,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:26:25,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:26:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:26:25,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:26:25,819 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 17:26:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:26:26,061 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2021-05-02 17:26:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:26:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 90 [2021-05-02 17:26:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:26:26,062 INFO L225 Difference]: With dead ends: 118 [2021-05-02 17:26:26,062 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 17:26:26,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:26:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 17:26:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 17:26:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 23 states have call successors, (23), 19 states have call predecessors, (23), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:26:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-05-02 17:26:26,074 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 90 [2021-05-02 17:26:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:26:26,074 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-05-02 17:26:26,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 17:26:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-05-02 17:26:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 17:26:26,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:26:26,075 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:26:26,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:26:26,291 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:26:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:26:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash -72219928, now seen corresponding path program 12 times [2021-05-02 17:26:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:26:26,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694848658] [2021-05-02 17:26:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:26:26,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:26:26,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822736439] [2021-05-02 17:26:26,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:26:26,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:26:26,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:26:26,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:26:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:26:26,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 85 proven. 68 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-05-02 17:26:26,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:26:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694848658] [2021-05-02 17:26:26,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:26:26,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822736439] [2021-05-02 17:26:26,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822736439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:26:26,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:26:26,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:26:26,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900130048] [2021-05-02 17:26:26,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:26:26,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:26:26,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:26:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:26:26,514 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 17:26:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:26:26,599 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2021-05-02 17:26:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:26:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 102 [2021-05-02 17:26:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:26:26,601 INFO L225 Difference]: With dead ends: 120 [2021-05-02 17:26:26,601 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 17:26:26,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:26:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 17:26:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-02 17:26:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 23 states have call successors, (23), 21 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:26:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-05-02 17:26:26,607 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 102 [2021-05-02 17:26:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:26:26,608 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-05-02 17:26:26,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 17:26:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-05-02 17:26:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 17:26:26,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:26:26,609 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:26:26,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 17:26:26,827 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:26:26,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:26:26,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1922485788, now seen corresponding path program 13 times [2021-05-02 17:26:26,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:26:26,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659804264] [2021-05-02 17:26:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:26:26,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:26:26,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372641943] [2021-05-02 17:26:26,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:26:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:26:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 17:26:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:26:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:26:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 135 proven. 20 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2021-05-02 17:26:27,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:26:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659804264] [2021-05-02 17:26:27,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:26:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372641943] [2021-05-02 17:26:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372641943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:26:27,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:26:27,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:26:27,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269868381] [2021-05-02 17:26:27,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:26:27,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:26:27,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:26:27,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:26:27,199 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 17:26:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:26:27,286 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-02 17:26:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:26:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 17:26:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:26:27,287 INFO L225 Difference]: With dead ends: 122 [2021-05-02 17:26:27,287 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:26:27,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:26:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:26:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:26:27,288 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) [2021-05-02 17:26:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:26:27,288 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2021-05-02 17:26:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:26:27,288 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:26:27,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 17:26:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:26:27,288 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:26:27,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:26:27,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:26:27,736 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-05-02 17:26:39,889 WARN L205 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-05-02 17:26:40,031 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-05-02 17:26:40,257 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2021-05-02 17:26:40,482 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 38 [2021-05-02 17:26:49,196 WARN L205 SmtUtils]: Spent 8.71 s on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2021-05-02 17:26:51,410 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 97 DAG size of output: 43 [2021-05-02 17:26:51,413 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 17:26:51,413 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 17:26:51,413 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 17:26:51,413 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:26:51,414 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|)) [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 17:26:51,414 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse2 (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1))) (.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 20)) (.cse3 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and .cse0 (= main_~t~0 9) .cse1 (= main_~a~0 4) .cse2) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~s~0 4) .cse3) (and .cse0 .cse1 (= 7 main_~t~0) .cse2 .cse3) (and .cse0 .cse1 (= main_~a~0 0) .cse3 (= main_~s~0 1)))) [2021-05-02 17:26:51,414 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 20)) (.cse2 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and .cse0 (= main_~t~0 9) (= main_~s~0 25) .cse1 (= main_~a~0 4)) (and .cse0 .cse1 (= 7 main_~t~0) (= main_~s~0 (+ main_~t~0 9)) .cse2) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~s~0 4) .cse2) (and .cse0 .cse1 (= main_~a~0 0) .cse2 (= main_~s~0 1)))) [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:26:51,414 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 17:26:51,415 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:26:51,415 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~a~0 2) 1) main_~t~0)) (.cse1 (= main_~s~0 (let ((.cse2 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse2 2) (* .cse2 .cse2) 1))))) (or (and (= main_~a~0 3) .cse0 .cse1) (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~a~0 4) .cse0 .cse1) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4)))) [2021-05-02 17:26:51,415 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 20)) (.cse2 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and .cse0 .cse1 (= 7 main_~t~0) (= main_~s~0 (+ main_~t~0 9)) .cse2) (and .cse0 (= main_~t~0 9) .cse1 (= main_~a~0 4) (= main_~s~0 (let ((.cse3 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse3 2) (* .cse3 .cse3) 1)))) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~s~0 4) .cse2) (and .cse0 .cse1 (= main_~a~0 0) .cse2 (= main_~s~0 1)))) [2021-05-02 17:26:51,415 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2021-05-02 17:26:51,415 INFO L194 CegarLoopUtils]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse2 (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1))) (.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 20)) (.cse3 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and .cse0 (= main_~t~0 9) .cse1 (= main_~a~0 4) .cse2) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~s~0 4) .cse3) (and .cse0 .cse1 (= 7 main_~t~0) .cse2 .cse3) (and .cse0 .cse1 (= main_~a~0 0) .cse3 (= main_~s~0 1)))) [2021-05-02 17:26:51,415 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse1 (= main_~s~0 (let ((.cse2 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse2 2) (* .cse2 .cse2) 1)))) (.cse0 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and (= 7 main_~t~0) .cse0 .cse1) (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~t~0 9) (= main_~a~0 4) .cse1) (and (= main_~a~0 0) .cse0 (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4)))) [2021-05-02 17:26:51,415 INFO L201 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-05-02 17:26:51,415 INFO L198 CegarLoopUtils]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-05-02 17:26:51,415 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= main_~s~0 (let ((.cse0 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse0 2) (* .cse0 .cse0) 1))) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-02 17:26:51,415 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 17:26:51,415 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 17:26:51,415 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 17:26:51,415 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:26:51,415 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:26:51,415 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 17:26:51,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:26:51 BoogieIcfgContainer [2021-05-02 17:26:51,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:26:51,427 INFO L168 Benchmark]: Toolchain (without parser) took 82440.31 ms. Allocated memory was 180.4 MB in the beginning and 316.7 MB in the end (delta: 136.3 MB). Free memory was 144.2 MB in the beginning and 144.2 MB in the end (delta: -11.3 kB). Peak memory consumption was 168.2 MB. Max. memory is 8.0 GB. [2021-05-02 17:26:51,427 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 180.4 MB. Free memory is still 160.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:26:51,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.37 ms. Allocated memory is still 180.4 MB. Free memory was 144.0 MB in the beginning and 163.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2021-05-02 17:26:51,427 INFO L168 Benchmark]: Boogie Preprocessor took 20.51 ms. Allocated memory is still 180.4 MB. Free memory was 163.3 MB in the beginning and 162.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:26:51,427 INFO L168 Benchmark]: RCFGBuilder took 291.38 ms. Allocated memory is still 180.4 MB. Free memory was 161.6 MB in the beginning and 147.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:26:51,427 INFO L168 Benchmark]: TraceAbstraction took 81875.53 ms. Allocated memory was 180.4 MB in the beginning and 316.7 MB in the end (delta: 136.3 MB). Free memory was 146.9 MB in the beginning and 144.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 170.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:26:51,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 180.4 MB. Free memory is still 160.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.37 ms. Allocated memory is still 180.4 MB. Free memory was 144.0 MB in the beginning and 163.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.51 ms. Allocated memory is still 180.4 MB. Free memory was 163.3 MB in the beginning and 162.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.38 ms. Allocated memory is still 180.4 MB. Free memory was 161.6 MB in the beginning and 147.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 81875.53 ms. Allocated memory was 180.4 MB in the beginning and 316.7 MB in the end (delta: 136.3 MB). Free memory was 146.9 MB in the beginning and 144.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 170.4 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: 57885.5ms, OverallIterations: 16, TraceHistogramMax: 17, EmptinessCheckTime: 19.2ms, AutomataDifference: 36029.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 23907.6ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 530 SDtfs, 183 SDslu, 2376 SDs, 0 SdLazy, 1981 SolverSat, 181 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 24818.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 942 GetRequests, 805 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 26231.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=15, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 160.8ms AutomataMinimizationTime, 16 MinimizatonAttempts, 12 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 53 PreInvPairs, 87 NumberOfFragments, 734 HoareAnnotationTreeSize, 53 FomulaSimplifications, 9150 FormulaSimplificationTreeSizeReduction, 110.1ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 2241 FormulaSimplificationTreeSizeReductionInter, 23787.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 111.4ms SsaConstructionTime, 502.0ms SatisfiabilityAnalysisTime, 17403.3ms InterpolantComputationTime, 944 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 928 ConstructedInterpolants, 0 QuantifiedInterpolants, 3016 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2554 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 2517/2911 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 && t == 9) && n <= 20) && a == 4) && s * 4 == t * t + t * 2 + 1) || ((((0 <= n && n <= 20) && s == t + 4) && a == 2) && s == 9)) || ((((0 <= n && s == t + 1) && n <= 20) && s == 4) && a * 2 + 1 == t)) || ((((0 <= n && n <= 20) && 7 == t) && s * 4 == t * t + t * 2 + 1) && a * 2 + 1 == t)) || ((((0 <= n && n <= 20) && a == 0) && a * 2 + 1 == t) && s == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...