/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:10:12,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:10:12,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:10:12,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:10:12,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:10:12,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:10:12,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:10:12,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:10:12,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:10:12,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:10:12,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:10:12,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:10:12,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:10:12,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:10:12,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:10:12,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:10:12,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:10:12,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:10:12,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:10:12,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:10:12,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 05:10:12,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:10:12,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:10:12,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:10:12,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:10:12,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:10:12,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:10:12,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:10:12,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:10:12,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:10:12,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:10:12,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:10:12,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:10:12,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:10:12,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:10:12,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:10:12,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:10:12,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:10:12,593 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:10:12,594 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:10:12,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-05-06 05:10:12,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151764e60/e77279cb9057467c9bd6f134fd8aca40/FLAG65b617cca [2021-05-06 05:10:12,975 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:10:12,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-05-06 05:10:12,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151764e60/e77279cb9057467c9bd6f134fd8aca40/FLAG65b617cca [2021-05-06 05:10:13,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151764e60/e77279cb9057467c9bd6f134fd8aca40 [2021-05-06 05:10:13,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:10:13,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:10:13,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:10:13,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:10:13,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:10:13,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b47f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13, skipping insertion in model container [2021-05-06 05:10:13,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:10:13,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:10:13,581 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_unwindbound10.c[520,533] [2021-05-06 05:10:13,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:10:13,602 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:10:13,615 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_unwindbound10.c[520,533] [2021-05-06 05:10:13,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:10:13,655 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:10:13,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13 WrapperNode [2021-05-06 05:10:13,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:10:13,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:10:13,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:10:13,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:10:13,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... [2021-05-06 05:10:13,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:10:13,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:10:13,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:10:13,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:10:13,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:10:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:10:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:10:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:10:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:10:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:10:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:10:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:10:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:10:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:10:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:10:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:10:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:10:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:10:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:10:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:10:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:10:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:10:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:10:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:10:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:10:13,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:10:13,970 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:10:13,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:10:13 BoogieIcfgContainer [2021-05-06 05:10:13,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:10:13,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:10:13,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:10:13,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:10:13,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:10:13" (1/3) ... [2021-05-06 05:10:13,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df84e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:10:13, skipping insertion in model container [2021-05-06 05:10:13,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:13" (2/3) ... [2021-05-06 05:10:13,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df84e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:10:13, skipping insertion in model container [2021-05-06 05:10:13,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:10:13" (3/3) ... [2021-05-06 05:10:13,975 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2021-05-06 05:10:13,989 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:10:13,992 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:10:14,011 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:10:14,034 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:10:14,034 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:10:14,035 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:10:14,035 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:10:14,035 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:10:14,035 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:10:14,035 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:10:14,035 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:10:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:10:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 05:10:14,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:14,056 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:14,056 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:14,060 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-06 05:10:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:14,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19114870] [2021-05-06 05:10:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:14,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:10:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:14,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:14,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19114870] [2021-05-06 05:10:14,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19114870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:14,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:14,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:10:14,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218492079] [2021-05-06 05:10:14,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:10:14,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:10:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:10:14,294 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:14,387 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-06 05:10:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:10:14,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 05:10:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:14,395 INFO L225 Difference]: With dead ends: 47 [2021-05-06 05:10:14,396 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 05:10:14,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:10:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 05:10:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 05:10:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:10:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 05:10:14,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 05:10:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:14,429 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 05:10:14,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 05:10:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:10:14,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:14,431 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:14,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:10:14,431 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-06 05:10:14,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:14,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139718764] [2021-05-06 05:10:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:14,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:10:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:14,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:14,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139718764] [2021-05-06 05:10:14,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139718764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:14,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:14,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:10:14,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778779910] [2021-05-06 05:10:14,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:14,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:14,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:14,539 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:14,618 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-06 05:10:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 05:10:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:14,619 INFO L225 Difference]: With dead ends: 32 [2021-05-06 05:10:14,619 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 05:10:14,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 05:10:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 05:10:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:10:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 05:10:14,625 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 05:10:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:14,625 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 05:10:14,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 05:10:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:10:14,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:14,625 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:14,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:10:14,626 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-06 05:10:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:14,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206024543] [2021-05-06 05:10:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:14,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:10:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:14,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:14,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206024543] [2021-05-06 05:10:14,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206024543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:14,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:14,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:10:14,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852290773] [2021-05-06 05:10:14,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:14,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:14,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:14,724 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:14,938 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 05:10:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 05:10:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:14,939 INFO L225 Difference]: With dead ends: 36 [2021-05-06 05:10:14,939 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:10:14,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:10:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:10:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 05:10:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:10:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 05:10:14,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 05:10:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:14,967 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 05:10:14,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 05:10:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:10:14,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:14,968 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:14,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:10:14,968 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2021-05-06 05:10:14,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:14,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550992044] [2021-05-06 05:10:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:14,976 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:14,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861208953] [2021-05-06 05:10:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:10:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:15,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:15,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:15,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550992044] [2021-05-06 05:10:15,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:15,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861208953] [2021-05-06 05:10:15,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861208953] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:15,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:15,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:10:15,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958500565] [2021-05-06 05:10:15,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:15,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:15,132 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:10:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:15,186 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 05:10:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:10:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 05:10:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:15,187 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:10:15,187 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 05:10:15,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 05:10:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 05:10:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:10:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 05:10:15,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2021-05-06 05:10:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:15,193 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 05:10:15,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:10:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 05:10:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:10:15,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:15,194 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:15,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:15,409 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2021-05-06 05:10:15,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:15,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302734105] [2021-05-06 05:10:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:15,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:15,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675882157] [2021-05-06 05:10:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:10:15,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:15,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:10:15,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:15,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302734105] [2021-05-06 05:10:15,526 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:15,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675882157] [2021-05-06 05:10:15,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675882157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:15,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:15,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:10:15,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616166357] [2021-05-06 05:10:15,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:15,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:15,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:15,527 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:10:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:15,573 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:10:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:10:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:10:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:15,577 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:10:15,577 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 05:10:15,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 05:10:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 05:10:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:10:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-06 05:10:15,589 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-06 05:10:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:15,589 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-06 05:10:15,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:10:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-06 05:10:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:10:15,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:15,591 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:15,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:15,814 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:15,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2021-05-06 05:10:15,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:15,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172065756] [2021-05-06 05:10:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:15,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:15,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272336354] [2021-05-06 05:10:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:10:15,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:15,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:10:15,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:15,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172065756] [2021-05-06 05:10:15,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:15,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272336354] [2021-05-06 05:10:15,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272336354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:15,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:15,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 05:10:15,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644737180] [2021-05-06 05:10:15,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:15,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:15,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:15,981 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:16,024 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-05-06 05:10:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 05:10:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:16,025 INFO L225 Difference]: With dead ends: 50 [2021-05-06 05:10:16,025 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 05:10:16,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 05:10:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 05:10:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:10:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 05:10:16,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2021-05-06 05:10:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:16,038 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 05:10:16,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 05:10:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:10:16,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:16,039 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:16,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:16,253 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2021-05-06 05:10:16,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:16,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544238823] [2021-05-06 05:10:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:16,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:16,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471556094] [2021-05-06 05:10:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:10:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:16,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:10:16,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544238823] [2021-05-06 05:10:16,401 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471556094] [2021-05-06 05:10:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471556094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:16,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:16,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928954770] [2021-05-06 05:10:16,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:16,403 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:16,465 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-06 05:10:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 05:10:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:16,470 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:10:16,470 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 05:10:16,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 05:10:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 05:10:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:10:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-06 05:10:16,483 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2021-05-06 05:10:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:16,484 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-06 05:10:16,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-06 05:10:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 05:10:16,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:16,486 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:16,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:16,694 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2021-05-06 05:10:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:16,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587647237] [2021-05-06 05:10:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:16,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:16,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208335093] [2021-05-06 05:10:16,701 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:16,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:16,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:10:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:16,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:10:16,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:16,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587647237] [2021-05-06 05:10:16,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:16,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208335093] [2021-05-06 05:10:16,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208335093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:16,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:16,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:16,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701989648] [2021-05-06 05:10:16,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:16,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:16,821 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:10:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:16,922 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-05-06 05:10:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-06 05:10:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:16,923 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:10:16,923 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 05:10:16,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 05:10:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 05:10:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 05:10:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-06 05:10:16,928 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 35 [2021-05-06 05:10:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:16,928 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-06 05:10:16,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:10:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-06 05:10:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:10:16,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:16,929 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:17,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:17,130 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1183106562, now seen corresponding path program 3 times [2021-05-06 05:10:17,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:17,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132781274] [2021-05-06 05:10:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:17,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:17,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031304874] [2021-05-06 05:10:17,147 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:17,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:10:17,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:17,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:10:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:17,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:10:17,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:17,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132781274] [2021-05-06 05:10:17,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:17,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031304874] [2021-05-06 05:10:17,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031304874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:17,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:17,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:17,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653733305] [2021-05-06 05:10:17,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:17,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:17,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:17,296 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:10:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:17,359 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-06 05:10:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 05:10:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:17,360 INFO L225 Difference]: With dead ends: 62 [2021-05-06 05:10:17,360 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 05:10:17,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 05:10:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 05:10:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:10:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-05-06 05:10:17,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 40 [2021-05-06 05:10:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:17,367 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-05-06 05:10:17,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:10:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-05-06 05:10:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:10:17,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:17,368 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:17,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:17,585 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1332643880, now seen corresponding path program 2 times [2021-05-06 05:10:17,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:17,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909886307] [2021-05-06 05:10:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:17,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:17,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725830055] [2021-05-06 05:10:17,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:17,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:17,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 05:10:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:17,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:10:17,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:17,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909886307] [2021-05-06 05:10:17,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:17,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725830055] [2021-05-06 05:10:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725830055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:17,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:17,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29381672] [2021-05-06 05:10:17,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:17,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:17,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:17,768 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:10:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:17,814 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-05-06 05:10:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:17,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-06 05:10:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:17,815 INFO L225 Difference]: With dead ends: 68 [2021-05-06 05:10:17,815 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 05:10:17,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 05:10:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 05:10:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:10:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-05-06 05:10:17,820 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 48 [2021-05-06 05:10:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:17,820 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-05-06 05:10:17,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:10:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-05-06 05:10:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:10:17,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:17,821 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:18,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:10:18,025 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1330975584, now seen corresponding path program 4 times [2021-05-06 05:10:18,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:18,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432348350] [2021-05-06 05:10:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:18,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:18,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167904533] [2021-05-06 05:10:18,039 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 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 [2021-05-06 05:10:18,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:10:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:10:18,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:18,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 05:10:18,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:18,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432348350] [2021-05-06 05:10:18,194 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:18,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167904533] [2021-05-06 05:10:18,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167904533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:18,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:18,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:10:18,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896160855] [2021-05-06 05:10:18,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:10:18,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:10:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:18,195 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:10:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:18,265 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-05-06 05:10:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:10:18,266 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-05-06 05:10:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:18,266 INFO L225 Difference]: With dead ends: 65 [2021-05-06 05:10:18,267 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 05:10:18,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:10:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 05:10:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 05:10:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:10:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-05-06 05:10:18,272 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2021-05-06 05:10:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:18,272 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-05-06 05:10:18,272 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:10:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-05-06 05:10:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 05:10:18,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:18,273 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:18,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 05:10:18,481 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash 107606955, now seen corresponding path program 5 times [2021-05-06 05:10:18,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:18,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321120327] [2021-05-06 05:10:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:18,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:18,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658605813] [2021-05-06 05:10:18,486 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 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 [2021-05-06 05:10:18,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 05:10:18,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 05:10:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:18,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:10:18,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:18,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321120327] [2021-05-06 05:10:18,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:18,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658605813] [2021-05-06 05:10:18,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658605813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:18,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:18,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:10:18,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425479071] [2021-05-06 05:10:18,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:10:18,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:10:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:18,691 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:10:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:18,773 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-06 05:10:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:10:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 05:10:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:18,774 INFO L225 Difference]: With dead ends: 76 [2021-05-06 05:10:18,774 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 05:10:18,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 05:10:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 05:10:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 05:10:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-06 05:10:18,785 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 53 [2021-05-06 05:10:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:18,785 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-06 05:10:18,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:10:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-06 05:10:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 05:10:18,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:18,786 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:18,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:18,994 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1960424256, now seen corresponding path program 6 times [2021-05-06 05:10:18,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:18,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696935504] [2021-05-06 05:10:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:18,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:19,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290100206] [2021-05-06 05:10:19,000 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 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 [2021-05-06 05:10:19,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 05:10:19,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 05:10:19,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:19,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 05:10:19,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696935504] [2021-05-06 05:10:19,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290100206] [2021-05-06 05:10:19,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290100206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:19,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:19,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:10:19,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375212142] [2021-05-06 05:10:19,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:10:19,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:10:19,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:10:19,278 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:10:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:19,407 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-05-06 05:10:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:10:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-06 05:10:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:19,410 INFO L225 Difference]: With dead ends: 80 [2021-05-06 05:10:19,410 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 05:10:19,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:10:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 05:10:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 05:10:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:10:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-05-06 05:10:19,421 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2021-05-06 05:10:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:19,422 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-05-06 05:10:19,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:10:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-05-06 05:10:19,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:10:19,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:19,422 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:19,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:19,631 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1498675765, now seen corresponding path program 1 times [2021-05-06 05:10:19,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:19,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527655296] [2021-05-06 05:10:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:19,637 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:19,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041348968] [2021-05-06 05:10:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 05:10:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:19,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:10:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:19,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 05:10:19,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527655296] [2021-05-06 05:10:19,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041348968] [2021-05-06 05:10:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041348968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:19,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:19,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:10:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521929488] [2021-05-06 05:10:19,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:10:19,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:10:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:19,846 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:19,900 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-05-06 05:10:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:10:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:10:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:19,901 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:10:19,901 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 05:10:19,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:10:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 05:10:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 05:10:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:10:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-05-06 05:10:19,906 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2021-05-06 05:10:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:19,906 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-05-06 05:10:19,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-05-06 05:10:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:10:19,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:19,907 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:20,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 05:10:20,125 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash -940246227, now seen corresponding path program 7 times [2021-05-06 05:10:20,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:20,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439604732] [2021-05-06 05:10:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:20,130 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:20,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635501741] [2021-05-06 05:10:20,130 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 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 [2021-05-06 05:10:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:20,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 05:10:20,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:20,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 05:10:20,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:20,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439604732] [2021-05-06 05:10:20,306 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:20,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635501741] [2021-05-06 05:10:20,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635501741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:20,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:20,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:20,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891264890] [2021-05-06 05:10:20,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:20,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:20,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:20,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:20,308 INFO L87 Difference]: Start difference. First operand 81 states and 86 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), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:20,394 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-05-06 05:10:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:20,394 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), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:10:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:20,395 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:10:20,395 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 05:10:20,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:10:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 05:10:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 05:10:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:10:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-05-06 05:10:20,400 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 71 [2021-05-06 05:10:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:20,400 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-05-06 05:10:20,400 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), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-05-06 05:10:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 05:10:20,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:20,401 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:20,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 05:10:20,617 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1041167106, now seen corresponding path program 8 times [2021-05-06 05:10:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:20,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809468269] [2021-05-06 05:10:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:20,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:20,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274960956] [2021-05-06 05:10:20,622 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 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 [2021-05-06 05:10:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 05:10:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:20,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 05:10:20,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809468269] [2021-05-06 05:10:20,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274960956] [2021-05-06 05:10:20,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274960956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:20,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:20,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:20,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277885079] [2021-05-06 05:10:20,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:20,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:20,957 INFO L87 Difference]: Start difference. First operand 91 states and 101 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:10:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:21,050 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-05-06 05:10:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:21,050 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-06 05:10:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:21,052 INFO L225 Difference]: With dead ends: 98 [2021-05-06 05:10:21,053 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 05:10:21,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:10:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 05:10:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 05:10:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:10:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-05-06 05:10:21,059 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 76 [2021-05-06 05:10:21,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:21,059 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-05-06 05:10:21,059 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:10:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-05-06 05:10:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:10:21,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:21,060 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:21,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 05:10:21,279 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash 122742071, now seen corresponding path program 2 times [2021-05-06 05:10:21,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:21,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160089012] [2021-05-06 05:10:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:21,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:21,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216614336] [2021-05-06 05:10:21,284 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 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 [2021-05-06 05:10:21,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:21,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 05:10:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:21,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 05:10:21,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:21,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160089012] [2021-05-06 05:10:21,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:21,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216614336] [2021-05-06 05:10:21,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216614336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:21,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:21,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083697797] [2021-05-06 05:10:21,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:21,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:21,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:21,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:21,504 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:10:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:21,600 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-05-06 05:10:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 05:10:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 89 [2021-05-06 05:10:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:21,601 INFO L225 Difference]: With dead ends: 112 [2021-05-06 05:10:21,601 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 05:10:21,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:10:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 05:10:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 05:10:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 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) [2021-05-06 05:10:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-05-06 05:10:21,608 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2021-05-06 05:10:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:21,609 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-05-06 05:10:21,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:10:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-05-06 05:10:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:10:21,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:21,610 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:21,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:21,825 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:21,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1978787375, now seen corresponding path program 9 times [2021-05-06 05:10:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:21,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425090006] [2021-05-06 05:10:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:21,830 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:21,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955608571] [2021-05-06 05:10:21,831 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:21,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 05:10:21,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:10:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:22,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:22,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:22,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:22,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:22,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-06 05:10:22,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:22,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425090006] [2021-05-06 05:10:22,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:22,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955608571] [2021-05-06 05:10:22,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955608571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:22,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:22,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:22,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431142804] [2021-05-06 05:10:22,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:22,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:22,106 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:10:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:22,269 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-05-06 05:10:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:22,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-05-06 05:10:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:22,270 INFO L225 Difference]: With dead ends: 100 [2021-05-06 05:10:22,270 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:10:22,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:10:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:10:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:10:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:10:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:10:22,271 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-05-06 05:10:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:22,271 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:10:22,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:10:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:10:22,271 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:10:22,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 05:10:22,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:10:22,850 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)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:10:22,850 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2021-05-06 05:10:22,850 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:10:22,850 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:22,851 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:22,851 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:22,851 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:22,851 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:22,851 INFO L198 CegarLoopUtils]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:10:22,851 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:22,851 INFO L194 CegarLoopUtils]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:22,852 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_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-06 05:10:22,852 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-06 05:10:22,852 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-06 05:10:22,852 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-06 05:10:22,852 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:10:22,852 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:10:22,852 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-06 05:10:22,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:10:22 BoogieIcfgContainer [2021-05-06 05:10:22,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:10:22,862 INFO L168 Benchmark]: Toolchain (without parser) took 9485.58 ms. Allocated memory was 188.7 MB in the beginning and 278.9 MB in the end (delta: 90.2 MB). Free memory was 152.2 MB in the beginning and 111.8 MB in the end (delta: 40.4 MB). Peak memory consumption was 131.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:22,862 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 188.7 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:10:22,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.72 ms. Allocated memory is still 188.7 MB. Free memory was 152.0 MB in the beginning and 171.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:22,862 INFO L168 Benchmark]: Boogie Preprocessor took 31.53 ms. Allocated memory is still 188.7 MB. Free memory was 171.6 MB in the beginning and 169.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:22,862 INFO L168 Benchmark]: RCFGBuilder took 282.11 ms. Allocated memory is still 188.7 MB. Free memory was 169.5 MB in the beginning and 154.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:22,862 INFO L168 Benchmark]: TraceAbstraction took 8889.51 ms. Allocated memory was 188.7 MB in the beginning and 278.9 MB in the end (delta: 90.2 MB). Free memory was 153.8 MB in the beginning and 111.8 MB in the end (delta: 42.0 MB). Peak memory consumption was 133.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:22,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 188.7 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.72 ms. Allocated memory is still 188.7 MB. Free memory was 152.0 MB in the beginning and 171.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.53 ms. Allocated memory is still 188.7 MB. Free memory was 171.6 MB in the beginning and 169.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.11 ms. Allocated memory is still 188.7 MB. Free memory was 169.5 MB in the beginning and 154.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8889.51 ms. Allocated memory was 188.7 MB in the beginning and 278.9 MB in the end (delta: 90.2 MB). Free memory was 153.8 MB in the beginning and 111.8 MB in the end (delta: 42.0 MB). Peak memory consumption was 133.7 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8455.9ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 16.4ms, AutomataDifference: 1643.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 361.0ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 128 SDslu, 1703 SDs, 0 SdLazy, 1083 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 781.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 811.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=17, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 153.2ms AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 63 PreInvPairs, 100 NumberOfFragments, 240 HoareAnnotationTreeSize, 63 FomulaSimplifications, 970 FormulaSimplificationTreeSizeReduction, 54.9ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 645 FormulaSimplificationTreeSizeReductionInter, 296.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 127.9ms SsaConstructionTime, 508.9ms SatisfiabilityAnalysisTime, 2076.3ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 794 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2668 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1501/2065 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: (s * 4 == t * t + t * 2 + 1 && a * 2 + 1 == t) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...