/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/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:24:06,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:24:06,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:24:06,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:24:06,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:24:06,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:24:06,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:24:06,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:24:06,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:24:06,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:24:06,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:24:06,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:24:06,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:24:06,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:24:06,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:24:06,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:24:06,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:24:06,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:24:06,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:24:06,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:24:06,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:24:06,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:24:06,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:24:06,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:24:06,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:24:06,239 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:24:06,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:24:06,239 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:24:06,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:24:06,240 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:24:06,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:24:06,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:24:06,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:24:06,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:24:06,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:24:06,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:24:06,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:24:06,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:24:06,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:24:06,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:24:06,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:24:06,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:24:06,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:24:06,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:24:06,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:24:06,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:24:06,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:24:06,520 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:24:06,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-05-02 13:24:06,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7650f3aa4/09f002da1f254c22aa9fbb1ac812d11d/FLAG1f471ba84 [2021-05-02 13:24:06,860 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:24:06,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-05-02 13:24:06,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7650f3aa4/09f002da1f254c22aa9fbb1ac812d11d/FLAG1f471ba84 [2021-05-02 13:24:07,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7650f3aa4/09f002da1f254c22aa9fbb1ac812d11d [2021-05-02 13:24:07,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:24:07,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:24:07,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:24:07,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:24:07,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:24:07,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e2bfe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07, skipping insertion in model container [2021-05-02 13:24:07,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:24:07,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:24:07,439 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2021-05-02 13:24:07,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:24:07,456 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:24:07,464 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2021-05-02 13:24:07,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:24:07,487 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:24:07,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07 WrapperNode [2021-05-02 13:24:07,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:24:07,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:24:07,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:24:07,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:24:07,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... [2021-05-02 13:24:07,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:24:07,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:24:07,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:24:07,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:24:07,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:24:07,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:24:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:24:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:24:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:24:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:24:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:24:07,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:24:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:24:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:24:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:24:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:24:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:24:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:24:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:24:07,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:24:07,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:24:07,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:24:07,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:24:07,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:24:07,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:24:07,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:24:07,938 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:24:07,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:24:07 BoogieIcfgContainer [2021-05-02 13:24:07,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:24:07,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:24:07,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:24:07,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:24:07,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:24:07" (1/3) ... [2021-05-02 13:24:07,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b536b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:24:07, skipping insertion in model container [2021-05-02 13:24:07,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:24:07" (2/3) ... [2021-05-02 13:24:07,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b536b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:24:07, skipping insertion in model container [2021-05-02 13:24:07,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:24:07" (3/3) ... [2021-05-02 13:24:07,944 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2021-05-02 13:24:07,948 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:24:07,950 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:24:07,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:24:07,976 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:24:07,977 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:24:07,977 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:24:07,977 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:24:07,977 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:24:07,977 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:24:07,977 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:24:07,977 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:24:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:24:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:24:07,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:07,997 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:07,997 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1128394070, now seen corresponding path program 1 times [2021-05-02 13:24:08,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:08,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70771609] [2021-05-02 13:24:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:08,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:24:08,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:08,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70771609] [2021-05-02 13:24:08,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70771609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:24:08,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:24:08,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:24:08,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653087383] [2021-05-02 13:24:08,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:24:08,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:24:08,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:24:08,544 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-05-02 13:24:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:09,082 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2021-05-02 13:24:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:24:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2021-05-02 13:24:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:09,090 INFO L225 Difference]: With dead ends: 71 [2021-05-02 13:24:09,090 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:24:09,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:24:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:24:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-05-02 13:24:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:24:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-05-02 13:24:09,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 14 [2021-05-02 13:24:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:09,125 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-05-02 13:24:09,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-05-02 13:24:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-05-02 13:24:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:24:09,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:09,127 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:09,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:24:09,127 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1294727378, now seen corresponding path program 1 times [2021-05-02 13:24:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:09,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360972115] [2021-05-02 13:24:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:09,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:09,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:24:09,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:09,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360972115] [2021-05-02 13:24:09,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360972115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:09,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172923372] [2021-05-02 13:24:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:09,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:24:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:24:09,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172923372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:09,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:09,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11] total 14 [2021-05-02 13:24:09,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233702587] [2021-05-02 13:24:09,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:24:09,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:24:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:24:09,638 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:24:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:10,108 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-05-02 13:24:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:24:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 13:24:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:10,109 INFO L225 Difference]: With dead ends: 56 [2021-05-02 13:24:10,109 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 13:24:10,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:24:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 13:24:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 13:24:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:24:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 13:24:10,115 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2021-05-02 13:24:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:10,115 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 13:24:10,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:24:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 13:24:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:24:10,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:10,116 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:10,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:24:10,333 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash 165784897, now seen corresponding path program 1 times [2021-05-02 13:24:10,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:10,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995624968] [2021-05-02 13:24:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:10,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:10,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:24:10,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:10,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995624968] [2021-05-02 13:24:10,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995624968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:10,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720662166] [2021-05-02 13:24:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:10,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:24:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:10,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:10,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:10,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:24:10,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720662166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:10,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:10,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-02 13:24:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495604200] [2021-05-02 13:24:10,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:24:10,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:24:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:24:10,938 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:24:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:11,506 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2021-05-02 13:24:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:24:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 13:24:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:11,508 INFO L225 Difference]: With dead ends: 69 [2021-05-02 13:24:11,508 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 13:24:11,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:24:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 13:24:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 13:24:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:24:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-02 13:24:11,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 28 [2021-05-02 13:24:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:11,515 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-02 13:24:11,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:24:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-02 13:24:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:24:11,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:11,516 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:11,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:11,729 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2072511662, now seen corresponding path program 1 times [2021-05-02 13:24:11,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:11,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962172221] [2021-05-02 13:24:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:11,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:11,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:11,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:24:11,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962172221] [2021-05-02 13:24:11,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962172221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454306815] [2021-05-02 13:24:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:12,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:24:12,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:12,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:12,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:12,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:12,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:12,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:12,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:12,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:24:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454306815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:12,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:12,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-02 13:24:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237425328] [2021-05-02 13:24:12,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:24:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:24:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:24:12,322 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:24:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:13,057 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2021-05-02 13:24:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:24:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 13:24:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:13,058 INFO L225 Difference]: With dead ends: 82 [2021-05-02 13:24:13,059 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 13:24:13,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 722.8ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:24:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 13:24:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-02 13:24:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:24:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-05-02 13:24:13,065 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 42 [2021-05-02 13:24:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:13,065 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-05-02 13:24:13,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:24:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-05-02 13:24:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 13:24:13,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:13,067 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:13,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:13,281 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:13,282 INFO L82 PathProgramCache]: Analyzing trace with hash 487343509, now seen corresponding path program 1 times [2021-05-02 13:24:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:13,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117207396] [2021-05-02 13:24:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:13,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:13,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:13,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:13,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 13:24:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:24:13,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:13,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117207396] [2021-05-02 13:24:13,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117207396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:13,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500743280] [2021-05-02 13:24:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:24:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:13,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:24:13,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500743280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:13,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:13,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-02 13:24:13,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403387986] [2021-05-02 13:24:13,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 13:24:13,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 13:24:13,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:24:13,994 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:24:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:14,753 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2021-05-02 13:24:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:24:14,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2021-05-02 13:24:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:14,759 INFO L225 Difference]: With dead ends: 94 [2021-05-02 13:24:14,759 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 13:24:14,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 833.1ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:24:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 13:24:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 13:24:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:24:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-05-02 13:24:14,779 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 55 [2021-05-02 13:24:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:14,780 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-05-02 13:24:14,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:24:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-05-02 13:24:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 13:24:14,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:14,783 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:14,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:14,999 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2075164167, now seen corresponding path program 1 times [2021-05-02 13:24:15,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:15,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075152287] [2021-05-02 13:24:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:15,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:15,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:15,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:15,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 13:24:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:15,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 13:24:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:24:15,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:15,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075152287] [2021-05-02 13:24:15,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075152287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:15,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008524967] [2021-05-02 13:24:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:15,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 13:24:15,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:15,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:24:15,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008524967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:15,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:15,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-02 13:24:15,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380081493] [2021-05-02 13:24:15,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:24:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:24:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:24:15,900 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:24:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:17,042 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2021-05-02 13:24:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:24:17,043 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 67 [2021-05-02 13:24:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:17,043 INFO L225 Difference]: With dead ends: 105 [2021-05-02 13:24:17,043 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 13:24:17,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1104.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:24:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 13:24:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 13:24:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:24:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-05-02 13:24:17,058 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 67 [2021-05-02 13:24:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:17,059 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-05-02 13:24:17,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:24:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-05-02 13:24:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 13:24:17,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:17,063 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:17,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:17,273 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1465266881, now seen corresponding path program 1 times [2021-05-02 13:24:17,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:17,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638546490] [2021-05-02 13:24:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 13:24:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 13:24:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 13:24:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 13:24:17,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638546490] [2021-05-02 13:24:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638546490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949434299] [2021-05-02 13:24:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 13:24:17,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:17,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:17,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:17,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:17,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 13:24:18,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949434299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:18,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:18,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-02 13:24:18,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350872905] [2021-05-02 13:24:18,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:24:18,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:24:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:24:18,349 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:24:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:19,824 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2021-05-02 13:24:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:24:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2021-05-02 13:24:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:19,826 INFO L225 Difference]: With dead ends: 115 [2021-05-02 13:24:19,826 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 13:24:19,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1355.5ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:24:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 13:24:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 13:24:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:24:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-05-02 13:24:19,832 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 78 [2021-05-02 13:24:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:19,832 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-05-02 13:24:19,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:24:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-05-02 13:24:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 13:24:19,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:19,833 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:20,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:20,044 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2020959176, now seen corresponding path program 1 times [2021-05-02 13:24:20,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:20,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550923575] [2021-05-02 13:24:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 13:24:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 13:24:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 13:24:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 13:24:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 13:24:20,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:20,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550923575] [2021-05-02 13:24:20,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550923575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:20,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020286776] [2021-05-02 13:24:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:20,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 13:24:20,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:20,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:20,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:21,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:21,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:21,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:21,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:21,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 11 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 13:24:21,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020286776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:21,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:21,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-02 13:24:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764910951] [2021-05-02 13:24:21,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 13:24:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 13:24:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:24:21,218 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 36 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:24:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:22,522 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2021-05-02 13:24:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:24:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 88 [2021-05-02 13:24:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:22,523 INFO L225 Difference]: With dead ends: 124 [2021-05-02 13:24:22,523 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 13:24:22,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1537.8ms TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:24:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 13:24:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-02 13:24:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:24:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2021-05-02 13:24:22,535 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 88 [2021-05-02 13:24:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:22,536 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2021-05-02 13:24:22,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:24:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2021-05-02 13:24:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 13:24:22,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:22,539 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:22,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:22,753 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash 802477461, now seen corresponding path program 1 times [2021-05-02 13:24:22,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:22,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200192784] [2021-05-02 13:24:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 13:24:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 13:24:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 13:24:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 13:24:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-05-02 13:24:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 13:24:23,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200192784] [2021-05-02 13:24:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200192784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215687160] [2021-05-02 13:24:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:23,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 13:24:23,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 13 proven. 187 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 13:24:23,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215687160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:23,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:23,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-05-02 13:24:23,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427698272] [2021-05-02 13:24:23,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 13:24:23,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 13:24:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:24:23,974 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 40 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:24:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:25,758 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2021-05-02 13:24:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:24:25,759 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 97 [2021-05-02 13:24:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:25,760 INFO L225 Difference]: With dead ends: 142 [2021-05-02 13:24:25,760 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 13:24:25,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1745.4ms TimeCoverageRelationStatistics Valid=406, Invalid=3500, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 13:24:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 13:24:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-05-02 13:24:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 96 states have internal predecessors, (103), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:24:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2021-05-02 13:24:25,769 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 97 [2021-05-02 13:24:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:25,769 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2021-05-02 13:24:25,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:24:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2021-05-02 13:24:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 13:24:25,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:25,771 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 7, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:25,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:24:25,987 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash -493792627, now seen corresponding path program 2 times [2021-05-02 13:24:25,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:25,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738589134] [2021-05-02 13:24:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 13:24:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 13:24:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 13:24:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 13:24:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-05-02 13:24:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 13:24:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 13:24:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 36 proven. 218 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 13:24:26,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738589134] [2021-05-02 13:24:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738589134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938863172] [2021-05-02 13:24:26,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:26,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:24:26,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:24:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:24:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:26,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 36 proven. 218 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 13:24:26,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938863172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:26,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:26,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 13:24:26,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986337920] [2021-05-02 13:24:26,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:24:26,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:26,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:24:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:24:26,830 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:24:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:27,572 INFO L93 Difference]: Finished difference Result 152 states and 181 transitions. [2021-05-02 13:24:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:24:27,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 113 [2021-05-02 13:24:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:27,574 INFO L225 Difference]: With dead ends: 152 [2021-05-02 13:24:27,574 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 13:24:27,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:24:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 13:24:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-05-02 13:24:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 105 states have internal predecessors, (113), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:24:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-05-02 13:24:27,582 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 113 [2021-05-02 13:24:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:27,582 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-05-02 13:24:27,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:24:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-05-02 13:24:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 13:24:27,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:27,583 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 8, 7, 6, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:27,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:24:27,793 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1034145518, now seen corresponding path program 3 times [2021-05-02 13:24:27,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:27,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106640319] [2021-05-02 13:24:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:24:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 13:24:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 13:24:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 13:24:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 13:24:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 13:24:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-05-02 13:24:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 13:24:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 13:24:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 13:24:28,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:28,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106640319] [2021-05-02 13:24:28,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106640319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:28,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833247749] [2021-05-02 13:24:28,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true