/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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:04:32,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:04:32,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:04:32,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:04:32,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:04:32,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:04:32,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:04:32,930 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 12:04:32,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:04:32,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:04:32,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:04:32,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:04:32,976 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:04:32,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:04:32,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:04:32,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:04:32,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:04:32,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:04:32,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:04:32,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:04:32,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:04:32,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:04:32,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:04:32,979 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:04:32,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:04:32,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:04:32,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:04:32,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:04:32,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:04:32,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:04:32,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:04:32,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:04:32,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:04:32,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:04:32,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:04:32,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:04:32,981 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:04:33,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:04:33,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:04:33,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:04:33,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:04:33,309 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:04:33,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2021-05-02 12:04:33,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121c6a443/4409e41cc1a64c748826f2ee4b04cac4/FLAG6323b1dd6 [2021-05-02 12:04:33,742 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:04:33,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2021-05-02 12:04:33,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121c6a443/4409e41cc1a64c748826f2ee4b04cac4/FLAG6323b1dd6 [2021-05-02 12:04:33,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121c6a443/4409e41cc1a64c748826f2ee4b04cac4 [2021-05-02 12:04:33,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:04:33,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:04:33,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:33,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:04:33,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:04:33,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:33" (1/1) ... [2021-05-02 12:04:33,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639b6a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:33, skipping insertion in model container [2021-05-02 12:04:33,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:33" (1/1) ... [2021-05-02 12:04:33,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:04:33,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:04:33,945 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2021-05-02 12:04:33,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:33,963 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:04:34,030 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2021-05-02 12:04:34,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:34,053 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:04:34,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34 WrapperNode [2021-05-02 12:04:34,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:34,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:04:34,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:04:34,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:04:34,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (1/1) ... [2021-05-02 12:04:34,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (1/1) ... [2021-05-02 12:04:34,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (1/1) ... [2021-05-02 12:04:34,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (1/1) ... [2021-05-02 12:04:34,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (1/1) ... [2021-05-02 12:04:34,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (1/1) ... [2021-05-02 12:04:34,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (1/1) ... [2021-05-02 12:04:34,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:04:34,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:04:34,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:04:34,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:04:34,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (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 12:04:34,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:04:34,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:04:34,171 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:04:34,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:04:34,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:04:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:04:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:04:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:04:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:04:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:04:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:04:34,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:04:34,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:04:34,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:04:34,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:04:34,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:04:34,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:04:34,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:04:34,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:04:34,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:04:34,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:04:34,381 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 12:04:34,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:34 BoogieIcfgContainer [2021-05-02 12:04:34,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:04:34,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:04:34,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:04:34,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:04:34,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:04:33" (1/3) ... [2021-05-02 12:04:34,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cbc75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:34, skipping insertion in model container [2021-05-02 12:04:34,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:34" (2/3) ... [2021-05-02 12:04:34,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cbc75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:34, skipping insertion in model container [2021-05-02 12:04:34,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:34" (3/3) ... [2021-05-02 12:04:34,388 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2021-05-02 12:04:34,392 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:04:34,395 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:04:34,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:04:34,428 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:04:34,428 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:04:34,428 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:04:34,428 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:04:34,428 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:04:34,428 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:04:34,428 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:04:34,428 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:04:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 12:04:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:04:34,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:34,443 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:34,444 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2021-05-02 12:04:34,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:34,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974817694] [2021-05-02 12:04:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,711 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 12:04:34,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:34,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974817694] [2021-05-02 12:04:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974817694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:34,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:34,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:04:34,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749173184] [2021-05-02 12:04:34,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:04:34,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:34,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:04:34,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:34,731 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 12:04:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:34,783 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 12:04:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:04:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2021-05-02 12:04:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:34,789 INFO L225 Difference]: With dead ends: 42 [2021-05-02 12:04:34,789 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 12:04:34,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 12:04:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 12:04:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 12:04:34,819 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-05-02 12:04:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:34,820 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 12:04:34,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 12:04:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 12:04:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 12:04:34,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:34,821 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:34,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:04:34,822 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2021-05-02 12:04:34,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:34,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307188455] [2021-05-02 12:04:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,933 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 12:04:34,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:34,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307188455] [2021-05-02 12:04:34,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307188455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:34,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:34,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:04:34,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359847786] [2021-05-02 12:04:34,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:04:34,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:34,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:04:34,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:34,936 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12:04:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:35,024 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 12:04:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:04:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2021-05-02 12:04:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:35,027 INFO L225 Difference]: With dead ends: 35 [2021-05-02 12:04:35,027 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 12:04:35,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 12:04:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-05-02 12:04:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 12:04:35,033 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2021-05-02 12:04:35,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:35,033 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 12:04:35,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12:04:35,033 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 12:04:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 12:04:35,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:35,034 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:35,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:04:35,034 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2021-05-02 12:04:35,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:35,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336984259] [2021-05-02 12:04:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:35,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:35,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336984259] [2021-05-02 12:04:35,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336984259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:35,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028022766] [2021-05-02 12:04:35,149 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 12:04:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 12:04:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:35,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:35,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028022766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:35,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:35,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 12:04:35,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114398268] [2021-05-02 12:04:35,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:04:35,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:35,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:04:35,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:35,338 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:35,432 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-05-02 12:04:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:04:35,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 12:04:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:35,435 INFO L225 Difference]: With dead ends: 42 [2021-05-02 12:04:35,435 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 12:04:35,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 12:04:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2021-05-02 12:04:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-02 12:04:35,450 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-05-02 12:04:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:35,450 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-02 12:04:35,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-02 12:04:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 12:04:35,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:35,451 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:35,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 12:04:35,675 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash -890617981, now seen corresponding path program 2 times [2021-05-02 12:04:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906330018] [2021-05-02 12:04:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:04:35,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:35,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906330018] [2021-05-02 12:04:35,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906330018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:35,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:35,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 12:04:35,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768217654] [2021-05-02 12:04:35,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:04:35,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:35,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:04:35,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:35,794 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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 12:04:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:35,900 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 12:04:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:04:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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 19 [2021-05-02 12:04:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:35,902 INFO L225 Difference]: With dead ends: 30 [2021-05-02 12:04:35,903 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 12:04:35,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 12:04:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 12:04:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 12:04:35,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-05-02 12:04:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:35,913 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 12:04:35,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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 12:04:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 12:04:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 12:04:35,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:35,914 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:35,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 12:04:35,915 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 1 times [2021-05-02 12:04:35,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:35,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200232964] [2021-05-02 12:04:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:36,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:04:36,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200232964] [2021-05-02 12:04:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200232964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180945705] [2021-05-02 12:04:36,017 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 12:04:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 12:04:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:36,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 12:04:36,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180945705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:36,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-05-02 12:04:36,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105106137] [2021-05-02 12:04:36,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:04:36,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:36,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:04:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:04:36,185 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:36,317 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-05-02 12:04:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:04:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 12:04:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:36,321 INFO L225 Difference]: With dead ends: 53 [2021-05-02 12:04:36,321 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 12:04:36,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 12:04:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-02 12:04:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 12:04:36,333 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-05-02 12:04:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:36,337 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 12:04:36,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 12:04:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 12:04:36,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:36,340 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:36,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:36,564 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2112474642, now seen corresponding path program 2 times [2021-05-02 12:04:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:36,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871850414] [2021-05-02 12:04:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:36,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 12:04:36,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:36,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871850414] [2021-05-02 12:04:36,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871850414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882704980] [2021-05-02 12:04:36,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:36,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:36,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:36,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:04:36,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:36,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 12:04:36,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882704980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:36,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 12:04:36,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475164614] [2021-05-02 12:04:36,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:04:36,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:36,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:04:36,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:36,795 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:36,876 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2021-05-02 12:04:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:04:36,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 12:04:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:36,877 INFO L225 Difference]: With dead ends: 64 [2021-05-02 12:04:36,877 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 12:04:36,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 12:04:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-05-02 12:04:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-05-02 12:04:36,888 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2021-05-02 12:04:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:36,889 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-05-02 12:04:36,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-05-02 12:04:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 12:04:36,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:36,890 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:37,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:37,109 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1083931824, now seen corresponding path program 3 times [2021-05-02 12:04:37,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:37,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466942553] [2021-05-02 12:04:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 12:04:37,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:37,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466942553] [2021-05-02 12:04:37,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466942553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:37,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728308955] [2021-05-02 12:04:37,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:37,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 12:04:37,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:04:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:37,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 12:04:37,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728308955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:37,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:37,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-02 12:04:37,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064823928] [2021-05-02 12:04:37,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:04:37,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:04:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:37,372 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:37,506 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-05-02 12:04:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:04:37,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 12:04:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:37,508 INFO L225 Difference]: With dead ends: 73 [2021-05-02 12:04:37,508 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 12:04:37,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 12:04:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 12:04:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 12:04:37,512 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2021-05-02 12:04:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:37,513 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 12:04:37,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 12:04:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 12:04:37,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:37,514 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:37,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:37,733 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1202225476, now seen corresponding path program 4 times [2021-05-02 12:04:37,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:37,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265464301] [2021-05-02 12:04:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:37,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:37,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265464301] [2021-05-02 12:04:37,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265464301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:37,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193838104] [2021-05-02 12:04:37,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:37,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:37,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:04:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:37,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:38,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193838104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:38,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 12:04:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403617281] [2021-05-02 12:04:38,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:04:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:04:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:38,005 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:38,084 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-05-02 12:04:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:04:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 12:04:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:38,087 INFO L225 Difference]: With dead ends: 84 [2021-05-02 12:04:38,087 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 12:04:38,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 12:04:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-05-02 12:04:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-05-02 12:04:38,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 45 [2021-05-02 12:04:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:38,106 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-05-02 12:04:38,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-05-02 12:04:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 12:04:38,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,108 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:38,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:38,317 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash -870108446, now seen corresponding path program 5 times [2021-05-02 12:04:38,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:38,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967621237] [2021-05-02 12:04:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:38,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:38,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967621237] [2021-05-02 12:04:38,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967621237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491502744] [2021-05-02 12:04:38,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:38,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 12:04:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:04:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:38,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:38,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491502744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:38,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 12:04:38,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051057789] [2021-05-02 12:04:38,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:04:38,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:38,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:04:38,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:38,607 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:38,699 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2021-05-02 12:04:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:04:38,699 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 12:04:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:38,700 INFO L225 Difference]: With dead ends: 91 [2021-05-02 12:04:38,700 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 12:04:38,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 12:04:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-05-02 12:04:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 12:04:38,710 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 47 [2021-05-02 12:04:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:38,710 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 12:04:38,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 12:04:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 12:04:38,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,713 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:38,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:38,929 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash 481817856, now seen corresponding path program 6 times [2021-05-02 12:04:38,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:38,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429841439] [2021-05-02 12:04:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:39,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:39,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429841439] [2021-05-02 12:04:39,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429841439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111759376] [2021-05-02 12:04:39,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:39,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-02 12:04:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:39,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:04:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:39,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:39,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111759376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:39,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 12:04:39,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035444290] [2021-05-02 12:04:39,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:04:39,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:39,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:04:39,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:39,242 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:39,338 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2021-05-02 12:04:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:04:39,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 12:04:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:39,340 INFO L225 Difference]: With dead ends: 98 [2021-05-02 12:04:39,340 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 12:04:39,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 12:04:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-05-02 12:04:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-05-02 12:04:39,355 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 49 [2021-05-02 12:04:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:39,355 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-05-02 12:04:39,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-05-02 12:04:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 12:04:39,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:39,356 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:39,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 12:04:39,577 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:39,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1692096610, now seen corresponding path program 7 times [2021-05-02 12:04:39,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:39,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467641009] [2021-05-02 12:04:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:39,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467641009] [2021-05-02 12:04:39,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467641009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849729738] [2021-05-02 12:04:39,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:04:39,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:39,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849729738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:39,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 12:04:39,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541208986] [2021-05-02 12:04:39,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 12:04:39,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 12:04:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:39,837 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:39,940 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2021-05-02 12:04:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:04:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 12:04:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:39,942 INFO L225 Difference]: With dead ends: 105 [2021-05-02 12:04:39,942 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 12:04:39,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 12:04:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-05-02 12:04:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 12:04:39,945 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 51 [2021-05-02 12:04:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:39,946 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 12:04:39,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 12:04:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 12:04:39,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:39,946 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 12:04:40,161 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,161 INFO L82 PathProgramCache]: Analyzing trace with hash 825174716, now seen corresponding path program 8 times [2021-05-02 12:04:40,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617022211] [2021-05-02 12:04:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:40,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617022211] [2021-05-02 12:04:40,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617022211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65255825] [2021-05-02 12:04:40,321 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 12:04:40,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:40,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 12:04:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:40,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:40,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65255825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:40,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 12:04:40,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565399742] [2021-05-02 12:04:40,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:04:40,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:04:40,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:40,492 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:40,604 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2021-05-02 12:04:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 12:04:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 12:04:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:40,606 INFO L225 Difference]: With dead ends: 112 [2021-05-02 12:04:40,606 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 12:04:40,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 12:04:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-05-02 12:04:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 12:04:40,610 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 53 [2021-05-02 12:04:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:40,610 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 12:04:40,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 12:04:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 12:04:40,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:40,611 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:40,825 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1856331354, now seen corresponding path program 9 times [2021-05-02 12:04:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73348413] [2021-05-02 12:04:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 12:04:40,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73348413] [2021-05-02 12:04:40,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73348413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181739577] [2021-05-02 12:04:40,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 12:04:41,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 12:04:41,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181739577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:41,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 17 [2021-05-02 12:04:41,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856540497] [2021-05-02 12:04:41,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:04:41,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:04:41,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:41,154 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 15 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:41,351 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2021-05-02 12:04:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:04:41,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 15 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 12:04:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:41,352 INFO L225 Difference]: With dead ends: 121 [2021-05-02 12:04:41,352 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 12:04:41,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 12:04:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-05-02 12:04:41,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-05-02 12:04:41,360 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 55 [2021-05-02 12:04:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:41,361 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-05-02 12:04:41,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 15 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-05-02 12:04:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 12:04:41,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:41,362 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:41,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,577 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1780722982, now seen corresponding path program 10 times [2021-05-02 12:04:41,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:41,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383391419] [2021-05-02 12:04:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:41,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:41,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383391419] [2021-05-02 12:04:41,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383391419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372522593] [2021-05-02 12:04:41,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:41,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372522593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:41,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 12:04:41,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685343850] [2021-05-02 12:04:41,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:04:41,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:04:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:41,941 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:42,057 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2021-05-02 12:04:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 12:04:42,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 12:04:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:42,059 INFO L225 Difference]: With dead ends: 144 [2021-05-02 12:04:42,059 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 12:04:42,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 12:04:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2021-05-02 12:04:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 79 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-05-02 12:04:42,063 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 81 [2021-05-02 12:04:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:42,063 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-05-02 12:04:42,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-05-02 12:04:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 12:04:42,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:42,064 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:42,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 12:04:42,273 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:42,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash 270994808, now seen corresponding path program 11 times [2021-05-02 12:04:42,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:42,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994836599] [2021-05-02 12:04:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:42,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:42,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994836599] [2021-05-02 12:04:42,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994836599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789138797] [2021-05-02 12:04:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:42,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-02 12:04:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:42,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 12:04:42,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:42,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:42,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789138797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:42,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 12:04:42,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533702457] [2021-05-02 12:04:42,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:04:42,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:42,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:04:42,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:42,731 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:42,862 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2021-05-02 12:04:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:04:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 12:04:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:42,863 INFO L225 Difference]: With dead ends: 151 [2021-05-02 12:04:42,863 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 12:04:42,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 12:04:42,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-05-02 12:04:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-05-02 12:04:42,873 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 83 [2021-05-02 12:04:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:42,874 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-05-02 12:04:42,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-05-02 12:04:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 12:04:42,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:42,874 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:43,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 12:04:43,088 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash 581802134, now seen corresponding path program 12 times [2021-05-02 12:04:43,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:43,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983713519] [2021-05-02 12:04:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:43,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:43,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983713519] [2021-05-02 12:04:43,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983713519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:43,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953818822] [2021-05-02 12:04:43,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:43,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-02 12:04:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:43,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:04:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:43,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:43,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953818822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:43,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:43,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 12:04:43,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807082586] [2021-05-02 12:04:43,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 12:04:43,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:43,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 12:04:43,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:43,620 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:43,748 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-05-02 12:04:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 12:04:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 12:04:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:43,749 INFO L225 Difference]: With dead ends: 158 [2021-05-02 12:04:43,749 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 12:04:43,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 12:04:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2021-05-02 12:04:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 83 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 12:04:43,753 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 85 [2021-05-02 12:04:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:43,753 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 12:04:43,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 12:04:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 12:04:43,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:43,753 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:43,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 12:04:43,954 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:43,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:43,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1380068300, now seen corresponding path program 13 times [2021-05-02 12:04:43,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:43,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180977460] [2021-05-02 12:04:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:44,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:44,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180977460] [2021-05-02 12:04:44,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180977460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459886279] [2021-05-02 12:04:44,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 12:04:44,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:44,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:44,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459886279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:44,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 12:04:44,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286043253] [2021-05-02 12:04:44,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 12:04:44,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 12:04:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:44,352 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:44,498 INFO L93 Difference]: Finished difference Result 165 states and 199 transitions. [2021-05-02 12:04:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:04:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 12:04:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:44,499 INFO L225 Difference]: With dead ends: 165 [2021-05-02 12:04:44,499 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 12:04:44,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 12:04:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2021-05-02 12:04:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2021-05-02 12:04:44,503 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 87 [2021-05-02 12:04:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:44,503 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2021-05-02 12:04:44,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2021-05-02 12:04:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 12:04:44,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:44,504 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:44,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:44,721 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1246912430, now seen corresponding path program 14 times [2021-05-02 12:04:44,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:44,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118223646] [2021-05-02 12:04:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:44,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:44,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118223646] [2021-05-02 12:04:44,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118223646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362104436] [2021-05-02 12:04:44,920 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:44,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:44,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:44,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 12:04:44,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:45,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:45,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362104436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:45,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 12:04:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383569643] [2021-05-02 12:04:45,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 12:04:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 12:04:45,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:45,151 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:45,287 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2021-05-02 12:04:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 12:04:45,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-02 12:04:45,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:45,289 INFO L225 Difference]: With dead ends: 172 [2021-05-02 12:04:45,289 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 12:04:45,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 12:04:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2021-05-02 12:04:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.160919540229885) internal successors, (101), 87 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-05-02 12:04:45,293 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 89 [2021-05-02 12:04:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:45,293 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-05-02 12:04:45,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-05-02 12:04:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 12:04:45,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:45,294 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:45,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 12:04:45,517 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2133140240, now seen corresponding path program 15 times [2021-05-02 12:04:45,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:45,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337908495] [2021-05-02 12:04:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 12:04:45,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337908495] [2021-05-02 12:04:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337908495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496912641] [2021-05-02 12:04:45,730 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:45,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 12:04:45,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 12:04:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:45,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 12:04:46,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496912641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:46,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 23 [2021-05-02 12:04:46,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335942149] [2021-05-02 12:04:46,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:04:46,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:04:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:46,070 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 21 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:46,285 INFO L93 Difference]: Finished difference Result 181 states and 219 transitions. [2021-05-02 12:04:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 12:04:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 21 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 12:04:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:46,286 INFO L225 Difference]: With dead ends: 181 [2021-05-02 12:04:46,286 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 12:04:46,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 12:04:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2021-05-02 12:04:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.176991150442478) internal successors, (133), 113 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2021-05-02 12:04:46,291 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 91 [2021-05-02 12:04:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:46,291 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2021-05-02 12:04:46,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 21 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2021-05-02 12:04:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 12:04:46,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:46,292 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:46,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:46,517 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:46,517 INFO L82 PathProgramCache]: Analyzing trace with hash -204294032, now seen corresponding path program 16 times [2021-05-02 12:04:46,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:46,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452640366] [2021-05-02 12:04:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:46,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:46,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452640366] [2021-05-02 12:04:46,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452640366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365590298] [2021-05-02 12:04:46,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:46,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:46,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:46,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:04:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:46,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:47,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365590298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:47,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:47,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 12:04:47,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294709831] [2021-05-02 12:04:47,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 12:04:47,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:47,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 12:04:47,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:47,065 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:47,220 INFO L93 Difference]: Finished difference Result 204 states and 244 transitions. [2021-05-02 12:04:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 12:04:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 12:04:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:47,221 INFO L225 Difference]: With dead ends: 204 [2021-05-02 12:04:47,221 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 12:04:47,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 12:04:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-05-02 12:04:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.173913043478261) internal successors, (135), 115 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2021-05-02 12:04:47,225 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 117 [2021-05-02 12:04:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:47,225 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2021-05-02 12:04:47,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2021-05-02 12:04:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 12:04:47,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:47,227 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:47,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:47,441 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1570964466, now seen corresponding path program 17 times [2021-05-02 12:04:47,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:47,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866602119] [2021-05-02 12:04:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:47,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:47,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:47,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866602119] [2021-05-02 12:04:47,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866602119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:47,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115520630] [2021-05-02 12:04:47,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:47,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-05-02 12:04:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:47,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 12:04:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:48,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:48,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115520630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:48,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 12:04:48,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90149884] [2021-05-02 12:04:48,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:04:48,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:04:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:48,194 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:48,374 INFO L93 Difference]: Finished difference Result 211 states and 253 transitions. [2021-05-02 12:04:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 12:04:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 12:04:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:48,375 INFO L225 Difference]: With dead ends: 211 [2021-05-02 12:04:48,375 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 12:04:48,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 12:04:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-05-02 12:04:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.170940170940171) internal successors, (137), 117 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-05-02 12:04:48,380 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 119 [2021-05-02 12:04:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:48,381 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-05-02 12:04:48,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-05-02 12:04:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 12:04:48,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:48,382 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:48,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 12:04:48,597 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash -681258964, now seen corresponding path program 18 times [2021-05-02 12:04:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:48,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803625643] [2021-05-02 12:04:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:48,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:48,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803625643] [2021-05-02 12:04:48,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803625643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409897538] [2021-05-02 12:04:48,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:49,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-02 12:04:49,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 12:04:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:49,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:49,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409897538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:49,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:49,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 12:04:49,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041357409] [2021-05-02 12:04:49,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 12:04:49,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:49,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 12:04:49,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:49,571 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:49,769 INFO L93 Difference]: Finished difference Result 218 states and 262 transitions. [2021-05-02 12:04:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 12:04:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-05-02 12:04:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:49,770 INFO L225 Difference]: With dead ends: 218 [2021-05-02 12:04:49,770 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 12:04:49,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 12:04:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 124. [2021-05-02 12:04:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 119 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2021-05-02 12:04:49,776 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 121 [2021-05-02 12:04:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:49,776 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2021-05-02 12:04:49,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2021-05-02 12:04:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 12:04:49,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:49,777 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:49,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:49,993 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash -372763446, now seen corresponding path program 19 times [2021-05-02 12:04:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:49,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900434673] [2021-05-02 12:04:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:50,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:50,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:50,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900434673] [2021-05-02 12:04:50,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900434673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:50,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747598853] [2021-05-02 12:04:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:50,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 12:04:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:50,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747598853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:50,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:50,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 12:04:50,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53699135] [2021-05-02 12:04:50,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 12:04:50,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 12:04:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:50,567 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:50,755 INFO L93 Difference]: Finished difference Result 225 states and 271 transitions. [2021-05-02 12:04:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 12:04:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-05-02 12:04:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:50,756 INFO L225 Difference]: With dead ends: 225 [2021-05-02 12:04:50,756 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 12:04:50,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 12:04:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 126. [2021-05-02 12:04:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2021-05-02 12:04:50,763 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 123 [2021-05-02 12:04:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:50,763 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2021-05-02 12:04:50,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2021-05-02 12:04:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 12:04:50,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:50,764 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:50,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 12:04:50,977 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash -261314072, now seen corresponding path program 20 times [2021-05-02 12:04:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:50,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901328222] [2021-05-02 12:04:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:51,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:51,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901328222] [2021-05-02 12:04:51,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901328222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752329323] [2021-05-02 12:04:51,270 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:51,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:51,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:51,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 12:04:51,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:51,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752329323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:51,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:51,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 12:04:51,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238713386] [2021-05-02 12:04:51,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 12:04:51,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:51,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 12:04:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:51,546 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:51,753 INFO L93 Difference]: Finished difference Result 232 states and 280 transitions. [2021-05-02 12:04:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 12:04:51,754 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 12:04:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:51,754 INFO L225 Difference]: With dead ends: 232 [2021-05-02 12:04:51,754 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 12:04:51,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 12:04:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 128. [2021-05-02 12:04:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2021-05-02 12:04:51,758 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 125 [2021-05-02 12:04:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:51,758 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2021-05-02 12:04:51,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2021-05-02 12:04:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 12:04:51,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:51,759 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:51,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 12:04:51,968 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash -532648058, now seen corresponding path program 21 times [2021-05-02 12:04:51,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:51,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600756388] [2021-05-02 12:04:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:52,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 12:04:52,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:52,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600756388] [2021-05-02 12:04:52,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600756388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:52,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711700170] [2021-05-02 12:04:52,298 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:52,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-02 12:04:52,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 12:04:52,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:52,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 12:04:52,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711700170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:52,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:52,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 29 [2021-05-02 12:04:52,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663092179] [2021-05-02 12:04:52,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 12:04:52,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 12:04:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:52,745 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 27 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:53,000 INFO L93 Difference]: Finished difference Result 241 states and 291 transitions. [2021-05-02 12:04:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:04:53,001 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 27 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-02 12:04:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:53,002 INFO L225 Difference]: With dead ends: 241 [2021-05-02 12:04:53,002 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 12:04:53,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 12:04:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-02 12:04:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.174496644295302) internal successors, (175), 149 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2021-05-02 12:04:53,006 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 127 [2021-05-02 12:04:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:53,007 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2021-05-02 12:04:53,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 27 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2021-05-02 12:04:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 12:04:53,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:53,008 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:53,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:53,213 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 395096582, now seen corresponding path program 22 times [2021-05-02 12:04:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249253825] [2021-05-02 12:04:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:53,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 12:04:53,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249253825] [2021-05-02 12:04:53,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249253825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802894651] [2021-05-02 12:04:53,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:53,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:53,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:53,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 12:04:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:53,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 12:04:53,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802894651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:53,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:53,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 12:04:53,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768042277] [2021-05-02 12:04:53,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 12:04:53,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:53,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 12:04:53,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:53,896 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:54,124 INFO L93 Difference]: Finished difference Result 264 states and 316 transitions. [2021-05-02 12:04:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 12:04:54,124 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 12:04:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:54,125 INFO L225 Difference]: With dead ends: 264 [2021-05-02 12:04:54,125 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 12:04:54,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 12:04:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2021-05-02 12:04:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.1721854304635762) internal successors, (177), 151 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 181 transitions. [2021-05-02 12:04:54,131 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 181 transitions. Word has length 153 [2021-05-02 12:04:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:54,131 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 181 transitions. [2021-05-02 12:04:54,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 181 transitions. [2021-05-02 12:04:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 12:04:54,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:54,132 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:54,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 12:04:54,349 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -687472988, now seen corresponding path program 23 times [2021-05-02 12:04:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:54,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039000017] [2021-05-02 12:04:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:54,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 12:04:54,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:54,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039000017] [2021-05-02 12:04:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039000017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:54,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841147730] [2021-05-02 12:04:54,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:56,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-05-02 12:04:56,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 12:04:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:56,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 12:04:56,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841147730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:56,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:56,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 12:04:56,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057422369] [2021-05-02 12:04:56,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 12:04:56,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:56,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 12:04:56,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:56,625 INFO L87 Difference]: Start difference. First operand 156 states and 181 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:56,880 INFO L93 Difference]: Finished difference Result 271 states and 325 transitions. [2021-05-02 12:04:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:04:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 12:04:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:56,882 INFO L225 Difference]: With dead ends: 271 [2021-05-02 12:04:56,882 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 12:04:56,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 12:04:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 158. [2021-05-02 12:04:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 153 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-05-02 12:04:56,886 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 155 [2021-05-02 12:04:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:56,887 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-05-02 12:04:56,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-05-02 12:04:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 12:04:56,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:56,887 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:57,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:57,097 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1654744126, now seen corresponding path program 24 times [2021-05-02 12:04:57,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:57,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564805208] [2021-05-02 12:04:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:57,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 12:04:57,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:57,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564805208] [2021-05-02 12:04:57,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564805208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:57,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604987669] [2021-05-02 12:04:57,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:59,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-05-02 12:04:59,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 12:04:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:59,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 12:04:59,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604987669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:59,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:59,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 32 [2021-05-02 12:04:59,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281921415] [2021-05-02 12:04:59,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 12:04:59,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:59,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 12:04:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:04:59,357 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 30 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:59,684 INFO L93 Difference]: Finished difference Result 280 states and 336 transitions. [2021-05-02 12:04:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 12:04:59,685 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 30 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 12:04:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:59,686 INFO L225 Difference]: With dead ends: 280 [2021-05-02 12:04:59,686 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 12:04:59,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:04:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 12:04:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-05-02 12:04:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.1736526946107784) internal successors, (196), 167 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2021-05-02 12:04:59,691 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 157 [2021-05-02 12:04:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:59,691 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2021-05-02 12:04:59,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 30 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2021-05-02 12:04:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 12:04:59,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:59,692 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:59,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 12:04:59,909 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:59,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:59,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1430410833, now seen corresponding path program 25 times [2021-05-02 12:04:59,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:59,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560605558] [2021-05-02 12:04:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:00,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 12:05:00,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:00,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560605558] [2021-05-02 12:05:00,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560605558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:00,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789613322] [2021-05-02 12:05:00,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 12:05:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:00,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 12:05:00,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789613322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:00,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:00,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 12:05:00,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590901060] [2021-05-02 12:05:00,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 12:05:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 12:05:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:05:00,623 INFO L87 Difference]: Start difference. First operand 172 states and 200 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:00,855 INFO L93 Difference]: Finished difference Result 294 states and 352 transitions. [2021-05-02 12:05:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 12:05:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 12:05:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:00,857 INFO L225 Difference]: With dead ends: 294 [2021-05-02 12:05:00,857 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 12:05:00,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:05:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 12:05:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2021-05-02 12:05:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 169 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 202 transitions. [2021-05-02 12:05:00,863 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 202 transitions. Word has length 171 [2021-05-02 12:05:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:00,863 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 202 transitions. [2021-05-02 12:05:00,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 202 transitions. [2021-05-02 12:05:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 12:05:00,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:00,864 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:01,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 12:05:01,084 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 212399983, now seen corresponding path program 26 times [2021-05-02 12:05:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:01,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691852518] [2021-05-02 12:05:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:01,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 12:05:01,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691852518] [2021-05-02 12:05:01,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691852518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262616730] [2021-05-02 12:05:01,513 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:01,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:05:01,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 12:05:01,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:01,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 12:05:01,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262616730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:01,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:01,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 12:05:01,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000563587] [2021-05-02 12:05:01,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 12:05:01,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 12:05:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:05:01,859 INFO L87 Difference]: Start difference. First operand 174 states and 202 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:02,091 INFO L93 Difference]: Finished difference Result 301 states and 361 transitions. [2021-05-02 12:05:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 12:05:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 12:05:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:02,093 INFO L225 Difference]: With dead ends: 301 [2021-05-02 12:05:02,093 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 12:05:02,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:05:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 12:05:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2021-05-02 12:05:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.1695906432748537) internal successors, (200), 171 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 204 transitions. [2021-05-02 12:05:02,100 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 204 transitions. Word has length 173 [2021-05-02 12:05:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:02,100 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 204 transitions. [2021-05-02 12:05:02,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 204 transitions. [2021-05-02 12:05:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 12:05:02,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:02,102 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:02,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:02,326 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2064922355, now seen corresponding path program 27 times [2021-05-02 12:05:02,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:02,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806366986] [2021-05-02 12:05:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:02,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 12:05:02,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:02,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806366986] [2021-05-02 12:05:02,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806366986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:02,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071369247] [2021-05-02 12:05:02,774 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:04,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-05-02 12:05:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 12:05:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:04,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 12:05:04,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071369247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:04,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:04,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 35 [2021-05-02 12:05:04,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247214505] [2021-05-02 12:05:04,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 12:05:04,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 12:05:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:05:04,375 INFO L87 Difference]: Start difference. First operand 176 states and 204 transitions. Second operand has 35 states, 35 states have (on average 5.257142857142857) internal successors, (184), 33 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:04,729 INFO L93 Difference]: Finished difference Result 310 states and 372 transitions. [2021-05-02 12:05:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 12:05:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.257142857142857) internal successors, (184), 33 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 12:05:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:04,730 INFO L225 Difference]: With dead ends: 310 [2021-05-02 12:05:04,730 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 12:05:04,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:05:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 12:05:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-05-02 12:05:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.172972972972973) internal successors, (217), 185 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2021-05-02 12:05:04,735 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 175 [2021-05-02 12:05:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:04,735 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2021-05-02 12:05:04,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.257142857142857) internal successors, (184), 33 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2021-05-02 12:05:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 12:05:04,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:04,736 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:04,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:04,963 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:04,963 INFO L82 PathProgramCache]: Analyzing trace with hash -913621092, now seen corresponding path program 28 times [2021-05-02 12:05:04,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:04,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626022510] [2021-05-02 12:05:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:05,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:05,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:05,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626022510] [2021-05-02 12:05:05,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626022510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:05,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104131185] [2021-05-02 12:05:05,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:05,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:05:05,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:05,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 12:05:05,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:05,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104131185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:05,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:05,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 12:05:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072921929] [2021-05-02 12:05:05,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 12:05:05,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:05,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 12:05:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:05:05,794 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:06,092 INFO L93 Difference]: Finished difference Result 324 states and 388 transitions. [2021-05-02 12:05:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 12:05:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 12:05:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:06,093 INFO L225 Difference]: With dead ends: 324 [2021-05-02 12:05:06,093 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 12:05:06,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:05:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 12:05:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 192. [2021-05-02 12:05:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.1711229946524064) internal successors, (219), 187 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 223 transitions. [2021-05-02 12:05:06,100 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 223 transitions. Word has length 189 [2021-05-02 12:05:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:06,100 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 223 transitions. [2021-05-02 12:05:06,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 223 transitions. [2021-05-02 12:05:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 12:05:06,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:06,101 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:06,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 12:05:06,317 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash -186444486, now seen corresponding path program 29 times [2021-05-02 12:05:06,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:06,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100731918] [2021-05-02 12:05:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:06,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:06,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100731918] [2021-05-02 12:05:06,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100731918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215166718] [2021-05-02 12:05:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:13,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-05-02 12:05:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 12:05:13,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:13,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:13,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215166718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:13,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:13,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 12:05:13,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143449419] [2021-05-02 12:05:13,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 12:05:13,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:13,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 12:05:13,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:05:13,887 INFO L87 Difference]: Start difference. First operand 192 states and 223 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:14,160 INFO L93 Difference]: Finished difference Result 331 states and 397 transitions. [2021-05-02 12:05:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 12:05:14,161 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-02 12:05:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:14,161 INFO L225 Difference]: With dead ends: 331 [2021-05-02 12:05:14,162 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 12:05:14,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:05:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 12:05:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 194. [2021-05-02 12:05:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.1693121693121693) internal successors, (221), 189 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 225 transitions. [2021-05-02 12:05:14,166 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 225 transitions. Word has length 191 [2021-05-02 12:05:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:14,167 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 225 transitions. [2021-05-02 12:05:14,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 225 transitions. [2021-05-02 12:05:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 12:05:14,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:14,168 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:14,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:14,384 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:14,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:14,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1449395368, now seen corresponding path program 30 times [2021-05-02 12:05:14,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:14,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222373019] [2021-05-02 12:05:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:14,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:14,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:14,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222373019] [2021-05-02 12:05:14,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222373019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:14,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420956211] [2021-05-02 12:05:14,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:22,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-05-02 12:05:22,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 12:05:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:22,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420956211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:22,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 12:05:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825480216] [2021-05-02 12:05:22,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 12:05:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 12:05:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:05:22,570 INFO L87 Difference]: Start difference. First operand 194 states and 225 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:22,821 INFO L93 Difference]: Finished difference Result 338 states and 406 transitions. [2021-05-02 12:05:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 12:05:22,822 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 12:05:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:22,822 INFO L225 Difference]: With dead ends: 338 [2021-05-02 12:05:22,822 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 12:05:22,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:05:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 12:05:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-05-02 12:05:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 191 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 227 transitions. [2021-05-02 12:05:22,827 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 227 transitions. Word has length 193 [2021-05-02 12:05:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:22,827 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 227 transitions. [2021-05-02 12:05:22,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 227 transitions. [2021-05-02 12:05:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 12:05:22,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:22,828 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:23,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 12:05:23,045 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:23,045 INFO L82 PathProgramCache]: Analyzing trace with hash 330551798, now seen corresponding path program 31 times [2021-05-02 12:05:23,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:23,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876246900] [2021-05-02 12:05:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:23,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:23,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:23,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876246900] [2021-05-02 12:05:23,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876246900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:23,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737027200] [2021-05-02 12:05:23,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 12:05:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:23,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737027200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:23,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:23,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 12:05:23,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096498758] [2021-05-02 12:05:23,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 12:05:23,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 12:05:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:05:23,916 INFO L87 Difference]: Start difference. First operand 196 states and 227 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:24,197 INFO L93 Difference]: Finished difference Result 345 states and 415 transitions. [2021-05-02 12:05:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 12:05:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 12:05:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:24,201 INFO L225 Difference]: With dead ends: 345 [2021-05-02 12:05:24,201 INFO L226 Difference]: Without dead ends: 220 [2021-05-02 12:05:24,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:05:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-02 12:05:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 198. [2021-05-02 12:05:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.16580310880829) internal successors, (225), 193 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 229 transitions. [2021-05-02 12:05:24,206 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 229 transitions. Word has length 195 [2021-05-02 12:05:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:24,206 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 229 transitions. [2021-05-02 12:05:24,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 229 transitions. [2021-05-02 12:05:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 12:05:24,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:24,207 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:24,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 12:05:24,421 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:24,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1462794516, now seen corresponding path program 32 times [2021-05-02 12:05:24,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:24,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469668355] [2021-05-02 12:05:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:25,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:25,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:25,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469668355] [2021-05-02 12:05:25,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469668355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:25,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359276010] [2021-05-02 12:05:25,026 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:25,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:05:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 12:05:25,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:25,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:25,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359276010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:25,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:25,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 12:05:25,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063299100] [2021-05-02 12:05:25,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 12:05:25,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:25,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 12:05:25,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:05:25,405 INFO L87 Difference]: Start difference. First operand 198 states and 229 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:25,659 INFO L93 Difference]: Finished difference Result 352 states and 424 transitions. [2021-05-02 12:05:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 12:05:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-05-02 12:05:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:25,661 INFO L225 Difference]: With dead ends: 352 [2021-05-02 12:05:25,661 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 12:05:25,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:05:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 12:05:25,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 200. [2021-05-02 12:05:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1641025641025642) internal successors, (227), 195 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 231 transitions. [2021-05-02 12:05:25,665 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 231 transitions. Word has length 197 [2021-05-02 12:05:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:25,665 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 231 transitions. [2021-05-02 12:05:25,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 231 transitions. [2021-05-02 12:05:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 12:05:25,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:25,667 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:25,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 12:05:25,889 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1373646670, now seen corresponding path program 33 times [2021-05-02 12:05:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785256616] [2021-05-02 12:05:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:26,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 12:05:26,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:26,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785256616] [2021-05-02 12:05:26,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785256616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:26,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250214511] [2021-05-02 12:05:26,479 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:35,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-02 12:05:35,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:35,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 12:05:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:35,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-05-02 12:05:35,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250214511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:35,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:35,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 41 [2021-05-02 12:05:35,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764851549] [2021-05-02 12:05:35,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 12:05:35,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:35,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 12:05:35,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:35,494 INFO L87 Difference]: Start difference. First operand 200 states and 231 transitions. Second operand has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 39 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:35,827 INFO L93 Difference]: Finished difference Result 361 states and 435 transitions. [2021-05-02 12:05:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 12:05:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 39 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2021-05-02 12:05:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:35,828 INFO L225 Difference]: With dead ends: 361 [2021-05-02 12:05:35,828 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 12:05:35,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 619.6ms TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 12:05:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2021-05-02 12:05:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.1719457013574661) internal successors, (259), 221 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2021-05-02 12:05:35,834 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 199 [2021-05-02 12:05:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:35,834 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2021-05-02 12:05:35,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 39 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2021-05-02 12:05:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 12:05:35,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:35,835 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:36,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 12:05:36,053 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:36,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1529913038, now seen corresponding path program 34 times [2021-05-02 12:05:36,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:36,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140200819] [2021-05-02 12:05:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:36,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 12:05:36,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140200819] [2021-05-02 12:05:36,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140200819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117011343] [2021-05-02 12:05:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:36,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:05:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 12:05:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:36,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:36,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 12:05:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117011343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:37,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:37,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 12:05:37,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113807889] [2021-05-02 12:05:37,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 12:05:37,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 12:05:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:05:37,109 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:37,412 INFO L93 Difference]: Finished difference Result 384 states and 460 transitions. [2021-05-02 12:05:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 12:05:37,412 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 12:05:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:37,414 INFO L225 Difference]: With dead ends: 384 [2021-05-02 12:05:37,414 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 12:05:37,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:05:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 12:05:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2021-05-02 12:05:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.1704035874439462) internal successors, (261), 223 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 265 transitions. [2021-05-02 12:05:37,419 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 265 transitions. Word has length 225 [2021-05-02 12:05:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:37,420 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 265 transitions. [2021-05-02 12:05:37,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 265 transitions. [2021-05-02 12:05:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 12:05:37,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:37,421 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:37,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 12:05:37,635 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash -181059632, now seen corresponding path program 35 times [2021-05-02 12:05:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:37,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540671515] [2021-05-02 12:05:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 12:05:38,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540671515] [2021-05-02 12:05:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540671515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419790825] [2021-05-02 12:05:38,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:41,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-05-02 12:05:41,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 12:05:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 12:05:41,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419790825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:41,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:41,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 12:05:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182417202] [2021-05-02 12:05:41,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 12:05:41,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 12:05:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:41,494 INFO L87 Difference]: Start difference. First operand 228 states and 265 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:41,791 INFO L93 Difference]: Finished difference Result 391 states and 469 transitions. [2021-05-02 12:05:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 12:05:41,792 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2021-05-02 12:05:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:41,793 INFO L225 Difference]: With dead ends: 391 [2021-05-02 12:05:41,793 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 12:05:41,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 12:05:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 230. [2021-05-02 12:05:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.1688888888888889) internal successors, (263), 225 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2021-05-02 12:05:41,798 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 227 [2021-05-02 12:05:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:41,798 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2021-05-02 12:05:41,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2021-05-02 12:05:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 12:05:41,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:41,799 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:42,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 12:05:42,025 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1013059858, now seen corresponding path program 36 times [2021-05-02 12:05:42,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:42,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20321808] [2021-05-02 12:05:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:42,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 12:05:42,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:42,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20321808] [2021-05-02 12:05:42,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20321808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:42,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109829880] [2021-05-02 12:05:42,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:55,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-05-02 12:05:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 12:05:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-05-02 12:05:55,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109829880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:55,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:55,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 44 [2021-05-02 12:05:55,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079435681] [2021-05-02 12:05:55,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 12:05:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 12:05:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:05:55,773 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 42 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:56,153 INFO L93 Difference]: Finished difference Result 400 states and 480 transitions. [2021-05-02 12:05:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 12:05:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 42 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2021-05-02 12:05:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:56,154 INFO L225 Difference]: With dead ends: 400 [2021-05-02 12:05:56,154 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 12:05:56,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 801.0ms TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:05:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 12:05:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2021-05-02 12:05:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.1715481171548117) internal successors, (280), 239 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 284 transitions. [2021-05-02 12:05:56,160 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 284 transitions. Word has length 229 [2021-05-02 12:05:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:56,160 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 284 transitions. [2021-05-02 12:05:56,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 42 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 284 transitions. [2021-05-02 12:05:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-05-02 12:05:56,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:56,162 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:56,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 12:05:56,377 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1473586819, now seen corresponding path program 37 times [2021-05-02 12:05:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:56,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776501687] [2021-05-02 12:05:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:57,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 12:05:57,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776501687] [2021-05-02 12:05:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776501687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879643932] [2021-05-02 12:05:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 12:05:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:57,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 12:05:57,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879643932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:57,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:57,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 12:05:57,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601532781] [2021-05-02 12:05:57,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 12:05:57,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 12:05:57,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:57,508 INFO L87 Difference]: Start difference. First operand 244 states and 284 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:57,852 INFO L93 Difference]: Finished difference Result 414 states and 496 transitions. [2021-05-02 12:05:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 12:05:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2021-05-02 12:05:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:57,856 INFO L225 Difference]: With dead ends: 414 [2021-05-02 12:05:57,856 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 12:05:57,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 625.0ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 12:05:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2021-05-02 12:05:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.170124481327801) internal successors, (282), 241 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2021-05-02 12:05:57,863 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 243 [2021-05-02 12:05:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:57,863 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2021-05-02 12:05:57,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2021-05-02 12:05:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-05-02 12:05:57,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:57,864 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:58,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:58,082 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash 960335003, now seen corresponding path program 38 times [2021-05-02 12:05:58,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:58,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609241578] [2021-05-02 12:05:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:59,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 12:05:59,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:59,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609241578] [2021-05-02 12:05:59,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609241578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:59,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741837369] [2021-05-02 12:05:59,133 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:59,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:05:59,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 12:05:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 12:05:59,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741837369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:59,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:59,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 12:05:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941382002] [2021-05-02 12:05:59,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 12:05:59,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:59,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 12:05:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:05:59,779 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:00,154 INFO L93 Difference]: Finished difference Result 421 states and 505 transitions. [2021-05-02 12:06:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 12:06:00,155 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2021-05-02 12:06:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:00,156 INFO L225 Difference]: With dead ends: 421 [2021-05-02 12:06:00,156 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 12:06:00,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:06:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 12:06:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 248. [2021-05-02 12:06:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.168724279835391) internal successors, (284), 243 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2021-05-02 12:06:00,161 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 245 [2021-05-02 12:06:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:00,161 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2021-05-02 12:06:00,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2021-05-02 12:06:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-05-02 12:06:00,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:00,163 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:00,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:00,389 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -797970375, now seen corresponding path program 39 times [2021-05-02 12:06:00,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:00,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462805171] [2021-05-02 12:06:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:01,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4526 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 12:06:01,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:01,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462805171] [2021-05-02 12:06:01,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462805171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:01,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093609364] [2021-05-02 12:06:01,417 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:21,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-05-02 12:06:21,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:21,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 12:06:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:21,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4526 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-05-02 12:06:21,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093609364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:21,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:21,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 47 [2021-05-02 12:06:21,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081899558] [2021-05-02 12:06:21,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 12:06:21,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 12:06:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:06:21,628 INFO L87 Difference]: Start difference. First operand 248 states and 288 transitions. Second operand has 47 states, 47 states have (on average 5.446808510638298) internal successors, (256), 45 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:21,976 INFO L93 Difference]: Finished difference Result 430 states and 516 transitions. [2021-05-02 12:06:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 12:06:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.446808510638298) internal successors, (256), 45 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2021-05-02 12:06:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:21,977 INFO L225 Difference]: With dead ends: 430 [2021-05-02 12:06:21,977 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 12:06:21,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 962.4ms TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:06:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 12:06:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-05-02 12:06:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.171206225680934) internal successors, (301), 257 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2021-05-02 12:06:21,983 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 247 [2021-05-02 12:06:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:21,983 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2021-05-02 12:06:21,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 5.446808510638298) internal successors, (256), 45 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2021-05-02 12:06:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-02 12:06:21,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:21,985 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:22,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:22,201 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash -690350392, now seen corresponding path program 40 times [2021-05-02 12:06:22,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:22,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911474763] [2021-05-02 12:06:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:23,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 12:06:23,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911474763] [2021-05-02 12:06:23,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911474763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620007793] [2021-05-02 12:06:23,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:23,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:06:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 12:06:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 12:06:23,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620007793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:23,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:23,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 12:06:23,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400112776] [2021-05-02 12:06:23,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 12:06:23,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 12:06:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:06:23,511 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:23,894 INFO L93 Difference]: Finished difference Result 444 states and 532 transitions. [2021-05-02 12:06:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 12:06:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2021-05-02 12:06:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:23,896 INFO L225 Difference]: With dead ends: 444 [2021-05-02 12:06:23,896 INFO L226 Difference]: Without dead ends: 271 [2021-05-02 12:06:23,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:06:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-02 12:06:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 264. [2021-05-02 12:06:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.16988416988417) internal successors, (303), 259 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 307 transitions. [2021-05-02 12:06:23,902 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 307 transitions. Word has length 261 [2021-05-02 12:06:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:23,902 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 307 transitions. [2021-05-02 12:06:23,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 307 transitions. [2021-05-02 12:06:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-02 12:06:23,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:23,903 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:24,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 12:06:24,121 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1136492134, now seen corresponding path program 41 times [2021-05-02 12:06:24,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:24,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900493369] [2021-05-02 12:06:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:24,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5167 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 12:06:24,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900493369] [2021-05-02 12:06:24,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900493369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812167923] [2021-05-02 12:06:24,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:36,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-02 12:06:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 12:06:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:36,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5167 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 12:06:36,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812167923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:36,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:36,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 12:06:36,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12941440] [2021-05-02 12:06:36,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 12:06:36,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 12:06:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:06:36,438 INFO L87 Difference]: Start difference. First operand 264 states and 307 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:36,884 INFO L93 Difference]: Finished difference Result 451 states and 541 transitions. [2021-05-02 12:06:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 12:06:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2021-05-02 12:06:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:36,887 INFO L225 Difference]: With dead ends: 451 [2021-05-02 12:06:36,887 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 12:06:36,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 763.1ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:06:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 12:06:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 266. [2021-05-02 12:06:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1685823754789273) internal successors, (305), 261 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2021-05-02 12:06:36,892 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 263 [2021-05-02 12:06:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:36,893 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2021-05-02 12:06:36,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2021-05-02 12:06:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-05-02 12:06:36,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:36,894 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:37,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:37,117 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash 90535556, now seen corresponding path program 42 times [2021-05-02 12:06:37,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:37,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607054076] [2021-05-02 12:06:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:37,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5252 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 12:06:37,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:37,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607054076] [2021-05-02 12:06:37,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607054076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:37,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911767175] [2021-05-02 12:06:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:08:07,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-05-02 12:08:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:08:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 12:08:08,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:08:08,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5252 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2021-05-02 12:08:08,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911767175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:08,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:08:08,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 50 [2021-05-02 12:08:08,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909162065] [2021-05-02 12:08:08,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 12:08:08,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:08:08,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 12:08:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:08:08,523 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand has 50 states, 50 states have (on average 5.48) internal successors, (274), 48 states have internal predecessors, (274), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:08:08,987 INFO L93 Difference]: Finished difference Result 460 states and 552 transitions. [2021-05-02 12:08:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 12:08:08,988 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.48) internal successors, (274), 48 states have internal predecessors, (274), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2021-05-02 12:08:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:08:08,989 INFO L225 Difference]: With dead ends: 460 [2021-05-02 12:08:08,989 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 12:08:08,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 901.5ms TimeCoverageRelationStatistics Valid=1097, Invalid=1555, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:08:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 12:08:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2021-05-02 12:08:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.170909090909091) internal successors, (322), 275 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 326 transitions. [2021-05-02 12:08:08,994 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 326 transitions. Word has length 265 [2021-05-02 12:08:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:08:08,994 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 326 transitions. [2021-05-02 12:08:08,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 5.48) internal successors, (274), 48 states have internal predecessors, (274), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 326 transitions. [2021-05-02 12:08:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-05-02 12:08:08,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:08:08,996 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:08:09,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:08:09,213 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:08:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:08:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1158596333, now seen corresponding path program 43 times [2021-05-02 12:08:09,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:08:09,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415609003] [2021-05-02 12:08:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:08:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:10,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:08:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 12:08:10,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:08:10,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415609003] [2021-05-02 12:08:10,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415609003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:10,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964022935] [2021-05-02 12:08:10,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:08:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:10,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 12:08:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:08:10,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 12:08:10,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964022935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:10,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:08:10,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 12:08:10,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456503873] [2021-05-02 12:08:10,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 12:08:10,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:08:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 12:08:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:08:10,614 INFO L87 Difference]: Start difference. First operand 280 states and 326 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:08:10,951 INFO L93 Difference]: Finished difference Result 474 states and 568 transitions. [2021-05-02 12:08:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 12:08:10,951 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2021-05-02 12:08:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:08:10,952 INFO L225 Difference]: With dead ends: 474 [2021-05-02 12:08:10,952 INFO L226 Difference]: Without dead ends: 289 [2021-05-02 12:08:10,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 829.7ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:08:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-02 12:08:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 282. [2021-05-02 12:08:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.1696750902527075) internal successors, (324), 277 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2021-05-02 12:08:10,957 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 279 [2021-05-02 12:08:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:08:10,957 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2021-05-02 12:08:10,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2021-05-02 12:08:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-05-02 12:08:10,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:08:10,958 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:08:11,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 12:08:11,177 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:08:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:08:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1368470833, now seen corresponding path program 44 times [2021-05-02 12:08:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:08:11,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726015932] [2021-05-02 12:08:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:08:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:12,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:08:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 12:08:12,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:08:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726015932] [2021-05-02 12:08:12,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726015932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040079964] [2021-05-02 12:08:12,210 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:08:12,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:08:12,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:08:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 12:08:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:08:12,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 12:08:12,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040079964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:12,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:08:12,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 12:08:12,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165638594] [2021-05-02 12:08:12,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 12:08:12,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:08:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 12:08:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:08:12,687 INFO L87 Difference]: Start difference. First operand 282 states and 328 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:08:13,065 INFO L93 Difference]: Finished difference Result 481 states and 577 transitions. [2021-05-02 12:08:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 12:08:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2021-05-02 12:08:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:08:13,066 INFO L225 Difference]: With dead ends: 481 [2021-05-02 12:08:13,067 INFO L226 Difference]: Without dead ends: 296 [2021-05-02 12:08:13,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 956.5ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:08:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-02 12:08:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-05-02 12:08:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.168458781362007) internal successors, (326), 279 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 330 transitions. [2021-05-02 12:08:13,072 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 330 transitions. Word has length 281 [2021-05-02 12:08:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:08:13,072 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 330 transitions. [2021-05-02 12:08:13,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:13,073 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 330 transitions. [2021-05-02 12:08:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-05-02 12:08:13,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:08:13,074 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:08:13,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 12:08:13,299 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:08:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:08:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1071472177, now seen corresponding path program 45 times [2021-05-02 12:08:13,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:08:13,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517981873] [2021-05-02 12:08:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:08:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:14,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:08:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6032 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 12:08:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:08:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517981873] [2021-05-02 12:08:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517981873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944820566] [2021-05-02 12:08:14,281 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:09:19,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-05-02 12:09:19,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:09:19,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 12:09:19,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:09:19,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6032 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-05-02 12:09:19,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944820566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:09:19,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:09:19,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 53 [2021-05-02 12:09:19,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465128968] [2021-05-02 12:09:19,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:09:19,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:09:19,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:09:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:09:19,645 INFO L87 Difference]: Start difference. First operand 284 states and 330 transitions. Second operand has 53 states, 53 states have (on average 5.509433962264151) internal successors, (292), 51 states have internal predecessors, (292), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:09:20,029 INFO L93 Difference]: Finished difference Result 490 states and 588 transitions. [2021-05-02 12:09:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:09:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.509433962264151) internal successors, (292), 51 states have internal predecessors, (292), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2021-05-02 12:09:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:09:20,030 INFO L225 Difference]: With dead ends: 490 [2021-05-02 12:09:20,030 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 12:09:20,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1015.4ms TimeCoverageRelationStatistics Valid=1241, Invalid=1729, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:09:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 12:09:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2021-05-02 12:09:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.1706484641638226) internal successors, (343), 293 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 347 transitions. [2021-05-02 12:09:20,036 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 347 transitions. Word has length 283 [2021-05-02 12:09:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:09:20,036 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 347 transitions. [2021-05-02 12:09:20,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 5.509433962264151) internal successors, (292), 51 states have internal predecessors, (292), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 347 transitions. [2021-05-02 12:09:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-05-02 12:09:20,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:09:20,038 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:09:20,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 12:09:20,241 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:09:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:09:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash -542351266, now seen corresponding path program 46 times [2021-05-02 12:09:20,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:09:20,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095688685] [2021-05-02 12:09:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:09:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:09:21,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:09:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:09:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 12:09:21,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:09:21,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095688685] [2021-05-02 12:09:21,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095688685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:09:21,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791771860] [2021-05-02 12:09:21,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:09:21,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:09:21,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:09:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 12:09:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:09:21,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 12:09:21,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791771860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:09:21,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:09:21,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 12:09:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092160922] [2021-05-02 12:09:21,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 12:09:21,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:09:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 12:09:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:09:21,854 INFO L87 Difference]: Start difference. First operand 298 states and 347 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:09:22,404 INFO L93 Difference]: Finished difference Result 504 states and 604 transitions. [2021-05-02 12:09:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 12:09:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2021-05-02 12:09:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:09:22,406 INFO L225 Difference]: With dead ends: 504 [2021-05-02 12:09:22,406 INFO L226 Difference]: Without dead ends: 307 [2021-05-02 12:09:22,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 963.5ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:09:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-02 12:09:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-05-02 12:09:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.1694915254237288) internal successors, (345), 295 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 349 transitions. [2021-05-02 12:09:22,411 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 349 transitions. Word has length 297 [2021-05-02 12:09:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:09:22,411 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 349 transitions. [2021-05-02 12:09:22,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 349 transitions. [2021-05-02 12:09:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-05-02 12:09:22,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:09:22,413 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:09:22,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:09:22,627 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:09:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:09:22,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2126303484, now seen corresponding path program 47 times [2021-05-02 12:09:22,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:09:22,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130208563] [2021-05-02 12:09:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:09:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:09:23,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:09:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:09:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6769 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 12:09:23,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:09:23,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130208563] [2021-05-02 12:09:23,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130208563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:09:23,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907828380] [2021-05-02 12:09:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:18,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-05-02 12:10:18,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 12:10:18,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:18,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:18,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6769 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 12:10:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907828380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:19,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:19,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 12:10:19,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328831366] [2021-05-02 12:10:19,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:10:19,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:19,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:10:19,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:10:19,219 INFO L87 Difference]: Start difference. First operand 300 states and 349 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:19,600 INFO L93 Difference]: Finished difference Result 511 states and 613 transitions. [2021-05-02 12:10:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:10:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2021-05-02 12:10:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:19,601 INFO L225 Difference]: With dead ends: 511 [2021-05-02 12:10:19,602 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 12:10:19,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:10:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 12:10:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 302. [2021-05-02 12:10:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.1683501683501682) internal successors, (347), 297 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 351 transitions. [2021-05-02 12:10:19,607 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 351 transitions. Word has length 299 [2021-05-02 12:10:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:19,607 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 351 transitions. [2021-05-02 12:10:19,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 351 transitions. [2021-05-02 12:10:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-05-02 12:10:19,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:19,609 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:19,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:19,833 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1686924774, now seen corresponding path program 48 times [2021-05-02 12:10:19,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:19,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851642725] [2021-05-02 12:10:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:20,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6866 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 12:10:20,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:20,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851642725] [2021-05-02 12:10:20,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851642725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:20,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920124415] [2021-05-02 12:10:20,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:15:48,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2021-05-02 12:15:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:15:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 12:15:48,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:15:48,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6866 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2021-05-02 12:15:48,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920124415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:15:48,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:15:48,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 56 [2021-05-02 12:15:48,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569090492] [2021-05-02 12:15:48,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 12:15:48,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:15:48,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 12:15:48,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:15:48,930 INFO L87 Difference]: Start difference. First operand 302 states and 351 transitions. Second operand has 56 states, 56 states have (on average 5.535714285714286) internal successors, (310), 54 states have internal predecessors, (310), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:15:49,503 INFO L93 Difference]: Finished difference Result 520 states and 624 transitions. [2021-05-02 12:15:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 12:15:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.535714285714286) internal successors, (310), 54 states have internal predecessors, (310), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2021-05-02 12:15:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:15:49,505 INFO L225 Difference]: With dead ends: 520 [2021-05-02 12:15:49,505 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 12:15:49,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1159.7ms TimeCoverageRelationStatistics Valid=1394, Invalid=1912, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:15:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 12:15:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2021-05-02 12:15:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.1704180064308682) internal successors, (364), 311 states have internal predecessors, (364), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 368 transitions. [2021-05-02 12:15:49,511 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 368 transitions. Word has length 301 [2021-05-02 12:15:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:15:49,511 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 368 transitions. [2021-05-02 12:15:49,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 5.535714285714286) internal successors, (310), 54 states have internal predecessors, (310), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 368 transitions. [2021-05-02 12:15:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-05-02 12:15:49,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:15:49,513 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:15:49,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:15:49,729 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:15:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:15:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1869589673, now seen corresponding path program 49 times [2021-05-02 12:15:49,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:15:49,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871119166] [2021-05-02 12:15:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:15:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:15:50,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:15:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:15:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7550 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 12:15:50,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:15:50,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871119166] [2021-05-02 12:15:50,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871119166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:15:50,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49605563] [2021-05-02 12:15:50,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:15:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:15:50,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 12:15:50,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:15:51,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7550 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 12:15:51,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49605563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:15:51,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:15:51,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 12:15:51,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487653732] [2021-05-02 12:15:51,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 12:15:51,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:15:51,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 12:15:51,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:15:51,368 INFO L87 Difference]: Start difference. First operand 316 states and 368 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:15:51,816 INFO L93 Difference]: Finished difference Result 534 states and 640 transitions. [2021-05-02 12:15:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 12:15:51,816 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2021-05-02 12:15:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:15:51,817 INFO L225 Difference]: With dead ends: 534 [2021-05-02 12:15:51,818 INFO L226 Difference]: Without dead ends: 325 [2021-05-02 12:15:51,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1035.2ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:15:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-02 12:15:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 318. [2021-05-02 12:15:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.1693290734824282) internal successors, (366), 313 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 370 transitions. [2021-05-02 12:15:51,824 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 370 transitions. Word has length 315 [2021-05-02 12:15:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:15:51,824 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 370 transitions. [2021-05-02 12:15:51,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 370 transitions. [2021-05-02 12:15:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-05-02 12:15:51,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:15:51,826 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:15:52,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:15:52,043 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:15:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:15:52,043 INFO L82 PathProgramCache]: Analyzing trace with hash -462655033, now seen corresponding path program 50 times [2021-05-02 12:15:52,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:15:52,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139615770] [2021-05-02 12:15:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:15:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:15:53,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:15:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:15:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7651 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 12:15:53,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:15:53,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139615770] [2021-05-02 12:15:53,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139615770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:15:53,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353508550] [2021-05-02 12:15:53,227 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:15:53,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:15:53,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:15:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 12:15:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:15:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:15:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7651 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 12:15:53,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353508550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:15:53,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:15:53,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 12:15:53,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710398698] [2021-05-02 12:15:53,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 12:15:53,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:15:53,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 12:15:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:15:53,763 INFO L87 Difference]: Start difference. First operand 318 states and 370 transitions. Second operand has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:15:54,247 INFO L93 Difference]: Finished difference Result 541 states and 649 transitions. [2021-05-02 12:15:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 12:15:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 317 [2021-05-02 12:15:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:15:54,249 INFO L225 Difference]: With dead ends: 541 [2021-05-02 12:15:54,249 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 12:15:54,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1092.7ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:15:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 12:15:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 320. [2021-05-02 12:15:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1682539682539683) internal successors, (368), 315 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 372 transitions. [2021-05-02 12:15:54,255 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 372 transitions. Word has length 317 [2021-05-02 12:15:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:15:54,255 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 372 transitions. [2021-05-02 12:15:54,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:15:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 372 transitions. [2021-05-02 12:15:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-05-02 12:15:54,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:15:54,257 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:15:54,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 12:15:54,473 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:15:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:15:54,473 INFO L82 PathProgramCache]: Analyzing trace with hash 223111013, now seen corresponding path program 51 times [2021-05-02 12:15:54,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:15:54,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719440676] [2021-05-02 12:15:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:15:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:15:55,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:15:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:15:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 12:15:55,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:15:55,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719440676] [2021-05-02 12:15:55,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719440676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:15:55,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953004893] [2021-05-02 12:15:55,688 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:08,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-05-02 12:18:08,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:18:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 12:18:08,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:18:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2021-05-02 12:18:08,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953004893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:08,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:18:08,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 59 [2021-05-02 12:18:08,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650087711] [2021-05-02 12:18:08,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 12:18:08,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:18:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 12:18:08,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1546, Invalid=1876, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 12:18:08,856 INFO L87 Difference]: Start difference. First operand 320 states and 372 transitions. Second operand has 59 states, 59 states have (on average 5.559322033898305) internal successors, (328), 57 states have internal predecessors, (328), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:18:09,370 INFO L93 Difference]: Finished difference Result 550 states and 660 transitions. [2021-05-02 12:18:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 12:18:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.559322033898305) internal successors, (328), 57 states have internal predecessors, (328), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2021-05-02 12:18:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:18:09,372 INFO L225 Difference]: With dead ends: 550 [2021-05-02 12:18:09,372 INFO L226 Difference]: Without dead ends: 336 [2021-05-02 12:18:09,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1245.5ms TimeCoverageRelationStatistics Valid=1556, Invalid=2104, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 12:18:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-02 12:18:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2021-05-02 12:18:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.1702127659574468) internal successors, (385), 329 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 389 transitions. [2021-05-02 12:18:09,376 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 389 transitions. Word has length 319 [2021-05-02 12:18:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:18:09,376 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 389 transitions. [2021-05-02 12:18:09,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 5.559322033898305) internal successors, (328), 57 states have internal predecessors, (328), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 389 transitions. [2021-05-02 12:18:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-05-02 12:18:09,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:18:09,378 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:18:09,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:09,605 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:18:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:18:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1372012020, now seen corresponding path program 52 times [2021-05-02 12:18:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:18:09,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615199092] [2021-05-02 12:18:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:18:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:10,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:18:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-05-02 12:18:10,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:18:10,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615199092] [2021-05-02 12:18:10,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615199092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:10,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105758802] [2021-05-02 12:18:10,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:10,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:18:10,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:18:10,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 12:18:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:18:10,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:10,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-05-02 12:18:11,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105758802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:11,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:18:11,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 12:18:11,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185505739] [2021-05-02 12:18:11,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 12:18:11,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:18:11,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 12:18:11,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:18:11,302 INFO L87 Difference]: Start difference. First operand 334 states and 389 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:18:11,824 INFO L93 Difference]: Finished difference Result 564 states and 676 transitions. [2021-05-02 12:18:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 12:18:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 333 [2021-05-02 12:18:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:18:11,826 INFO L225 Difference]: With dead ends: 564 [2021-05-02 12:18:11,826 INFO L226 Difference]: Without dead ends: 343 [2021-05-02 12:18:11,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1101.5ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:18:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-02 12:18:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 336. [2021-05-02 12:18:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.1691842900302114) internal successors, (387), 331 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 391 transitions. [2021-05-02 12:18:11,831 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 391 transitions. Word has length 333 [2021-05-02 12:18:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:18:11,831 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 391 transitions. [2021-05-02 12:18:11,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 391 transitions. [2021-05-02 12:18:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-05-02 12:18:11,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:18:11,833 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:18:12,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 12:18:12,049 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:18:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:18:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash 921974674, now seen corresponding path program 53 times [2021-05-02 12:18:12,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:18:12,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641127745] [2021-05-02 12:18:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:18:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:13,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:18:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8587 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-05-02 12:18:13,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:18:13,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641127745] [2021-05-02 12:18:13,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641127745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:13,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599021077] [2021-05-02 12:18:13,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true