/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 06:39:48,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 06:39:48,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 06:39:48,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 06:39:48,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 06:39:48,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 06:39:48,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 06:39:48,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 06:39:48,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 06:39:48,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 06:39:48,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 06:39:48,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 06:39:48,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 06:39:48,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 06:39:48,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 06:39:48,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 06:39:48,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 06:39:48,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 06:39:48,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 06:39:48,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 06:39:48,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 06:39:48,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 06:39:48,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 06:39:48,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 06:39:48,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 06:39:48,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 06:39:48,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 06:39:48,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 06:39:48,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 06:39:48,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 06:39:48,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 06:39:48,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 06:39:48,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 06:39:48,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 06:39:48,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 06:39:48,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 06:39:48,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 06:39:48,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 06:39:48,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 06:39:48,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 06:39:48,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 06:39:48,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 06:39:48,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 06:39:48,888 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 06:39:48,889 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 06:39:49,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 06:39:49,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 06:39:49,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 06:39:49,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 06:39:49,250 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 06:39:49,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2021-05-01 06:39:49,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a06474c5/7a0fce2ba93c4b64865d32b396e9497f/FLAG834c8e846 [2021-05-01 06:39:49,767 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 06:39:49,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c [2021-05-01 06:39:49,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a06474c5/7a0fce2ba93c4b64865d32b396e9497f/FLAG834c8e846 [2021-05-01 06:39:49,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a06474c5/7a0fce2ba93c4b64865d32b396e9497f [2021-05-01 06:39:49,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 06:39:49,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 06:39:49,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 06:39:49,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 06:39:49,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 06:39:49,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:39:49" (1/1) ... [2021-05-01 06:39:49,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352de9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:49, skipping insertion in model container [2021-05-01 06:39:49,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:39:49" (1/1) ... [2021-05-01 06:39:49,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 06:39:49,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 06:39:49,972 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c[446,459] [2021-05-01 06:39:50,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:39:50,069 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 06:39:50,082 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c[446,459] [2021-05-01 06:39:50,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:39:50,127 INFO L208 MainTranslator]: Completed translation [2021-05-01 06:39:50,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50 WrapperNode [2021-05-01 06:39:50,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 06:39:50,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 06:39:50,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 06:39:50,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 06:39:50,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (1/1) ... [2021-05-01 06:39:50,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (1/1) ... [2021-05-01 06:39:50,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (1/1) ... [2021-05-01 06:39:50,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (1/1) ... [2021-05-01 06:39:50,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (1/1) ... [2021-05-01 06:39:50,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (1/1) ... [2021-05-01 06:39:50,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (1/1) ... [2021-05-01 06:39:50,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 06:39:50,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 06:39:50,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 06:39:50,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 06:39:50,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (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 [2021-05-01 06:39:50,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 06:39:50,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 06:39:50,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 06:39:50,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 06:39:50,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 06:39:50,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 06:39:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 06:39:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 06:39:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 06:39:50,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 06:39:50,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 06:39:50,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 06:39:50,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 06:39:50,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 06:39:50,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 06:39:50,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 06:39:50,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 06:39:50,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 06:39:50,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 06:39:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 06:39:50,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 06:39:50,694 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-05-01 06:39:50,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:39:50 BoogieIcfgContainer [2021-05-01 06:39:50,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 06:39:50,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 06:39:50,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 06:39:50,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 06:39:50,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 06:39:49" (1/3) ... [2021-05-01 06:39:50,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6d7c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:39:50, skipping insertion in model container [2021-05-01 06:39:50,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:50" (2/3) ... [2021-05-01 06:39:50,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6d7c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:39:50, skipping insertion in model container [2021-05-01 06:39:50,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:39:50" (3/3) ... [2021-05-01 06:39:50,701 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2021-05-01 06:39:50,706 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 06:39:50,710 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 06:39:50,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 06:39:50,737 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 06:39:50,738 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 06:39:50,738 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 06:39:50,738 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 06:39:50,738 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 06:39:50,738 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 06:39:50,738 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 06:39:50,739 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 06:39:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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) [2021-05-01 06:39:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 06:39:50,759 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:50,759 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:50,760 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 1 times [2021-05-01 06:39:50,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:50,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570878131] [2021-05-01 06:39:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:50,833 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:50,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:50,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:50,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:50,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:51,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:51,076 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:51,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570878131] [2021-05-01 06:39:51,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570878131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:51,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:51,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 06:39:51,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535544459] [2021-05-01 06:39:51,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 06:39:51,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 06:39:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:39:51,097 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-05-01 06:39:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:51,261 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2021-05-01 06:39:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 06:39:51,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 [2021-05-01 06:39:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:51,267 INFO L225 Difference]: With dead ends: 65 [2021-05-01 06:39:51,267 INFO L226 Difference]: Without dead ends: 32 [2021-05-01 06:39:51,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:39:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-01 06:39:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-01 06:39:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:39:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-01 06:39:51,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2021-05-01 06:39:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:51,302 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-01 06:39:51,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-05-01 06:39:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-01 06:39:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 06:39:51,303 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:51,303 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:51,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 06:39:51,303 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:51,304 INFO L82 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 1 times [2021-05-01 06:39:51,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:51,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232877388] [2021-05-01 06:39:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:51,307 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:51,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,367 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:51,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:51,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:51,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:51,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:51,452 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:51,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232877388] [2021-05-01 06:39:51,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232877388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:51,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:51,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 06:39:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866581010] [2021-05-01 06:39:51,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 06:39:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 06:39:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:39:51,455 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-05-01 06:39:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:51,648 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-05-01 06:39:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 06:39:51,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 [2021-05-01 06:39:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:51,651 INFO L225 Difference]: With dead ends: 80 [2021-05-01 06:39:51,651 INFO L226 Difference]: Without dead ends: 48 [2021-05-01 06:39:51,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:39:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-01 06:39:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-05-01 06:39:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:39:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-01 06:39:51,661 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2021-05-01 06:39:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:51,661 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-01 06:39:51,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-05-01 06:39:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-01 06:39:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-01 06:39:51,662 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:51,662 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:51,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 06:39:51,663 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 1 times [2021-05-01 06:39:51,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:51,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609609993] [2021-05-01 06:39:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:51,677 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:51,679 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:51,750 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,754 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-05-01 06:39:51,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:39:51,797 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:39:51,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:39:51,821 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:39:51,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:39:51,839 INFO L142 QuantifierPusher]: treesize reduction 19, result has 64.8 percent of original size [2021-05-01 06:39:51,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:39:51,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:51,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:51,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:51,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:51,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:51,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:51,931 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609609993] [2021-05-01 06:39:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [609609993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:51,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:51,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 06:39:51,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330216942] [2021-05-01 06:39:51,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 06:39:51,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:51,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 06:39:51,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:39:51,934 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2021-05-01 06:39:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:52,244 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2021-05-01 06:39:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 06:39:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 25 [2021-05-01 06:39:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:52,249 INFO L225 Difference]: With dead ends: 78 [2021-05-01 06:39:52,250 INFO L226 Difference]: Without dead ends: 76 [2021-05-01 06:39:52,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-01 06:39:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-01 06:39:52,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-05-01 06:39:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-05-01 06:39:52,274 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 25 [2021-05-01 06:39:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:52,275 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-05-01 06:39:52,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2021-05-01 06:39:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-05-01 06:39:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-01 06:39:52,277 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:52,277 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:52,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 06:39:52,278 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 1 times [2021-05-01 06:39:52,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:52,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246439126] [2021-05-01 06:39:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:52,284 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:52,287 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:52,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:52,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:52,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:52,388 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:52,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246439126] [2021-05-01 06:39:52,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [246439126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:52,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:52,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 06:39:52,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470966157] [2021-05-01 06:39:52,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 06:39:52,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 06:39:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 06:39:52,390 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-05-01 06:39:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:52,486 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-05-01 06:39:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 06:39:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 25 [2021-05-01 06:39:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:52,490 INFO L225 Difference]: With dead ends: 82 [2021-05-01 06:39:52,490 INFO L226 Difference]: Without dead ends: 57 [2021-05-01 06:39:52,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 06:39:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-01 06:39:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-01 06:39:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-05-01 06:39:52,513 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2021-05-01 06:39:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:52,513 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-05-01 06:39:52,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-05-01 06:39:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-05-01 06:39:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-01 06:39:52,515 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:52,515 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:52,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 06:39:52,515 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 1 times [2021-05-01 06:39:52,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:52,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608962914] [2021-05-01 06:39:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:52,528 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:52,533 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:52,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,589 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:52,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:39:52,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:52,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:52,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:52,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:52,650 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608962914] [2021-05-01 06:39:52,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [608962914] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:52,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:52,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 06:39:52,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404092903] [2021-05-01 06:39:52,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 06:39:52,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 06:39:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:39:52,652 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-05-01 06:39:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:52,814 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2021-05-01 06:39:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 06:39:52,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 28 [2021-05-01 06:39:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:52,816 INFO L225 Difference]: With dead ends: 130 [2021-05-01 06:39:52,816 INFO L226 Difference]: Without dead ends: 94 [2021-05-01 06:39:52,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:39:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-01 06:39:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-05-01 06:39:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 61 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-05-01 06:39:52,834 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 28 [2021-05-01 06:39:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:52,834 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-05-01 06:39:52,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-05-01 06:39:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-05-01 06:39:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-01 06:39:52,835 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:52,836 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:52,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 06:39:52,836 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 1 times [2021-05-01 06:39:52,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:52,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992293770] [2021-05-01 06:39:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:52,843 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:52,845 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:52,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,870 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:52,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:52,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:52,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:52,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:52,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:52,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:52,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:52,935 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992293770] [2021-05-01 06:39:52,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992293770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:52,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:52,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:39:52,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353207873] [2021-05-01 06:39:52,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:39:52,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:39:52,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:39:52,937 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-05-01 06:39:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:53,209 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2021-05-01 06:39:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 06:39:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 28 [2021-05-01 06:39:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:53,212 INFO L225 Difference]: With dead ends: 178 [2021-05-01 06:39:53,212 INFO L226 Difference]: Without dead ends: 148 [2021-05-01 06:39:53,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-01 06:39:53,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-01 06:39:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 87. [2021-05-01 06:39:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2021-05-01 06:39:53,245 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 28 [2021-05-01 06:39:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:53,246 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2021-05-01 06:39:53,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-05-01 06:39:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2021-05-01 06:39:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-01 06:39:53,247 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:53,247 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:53,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-01 06:39:53,247 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:53,248 INFO L82 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 1 times [2021-05-01 06:39:53,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:53,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519724285] [2021-05-01 06:39:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:53,251 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:53,252 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:53,421 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:53,425 INFO L142 QuantifierPusher]: treesize reduction 6, result has 83.8 percent of original size [2021-05-01 06:39:53,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:39:53,461 INFO L142 QuantifierPusher]: treesize reduction 16, result has 80.2 percent of original size [2021-05-01 06:39:53,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 06:39:53,524 INFO L142 QuantifierPusher]: treesize reduction 22, result has 72.5 percent of original size [2021-05-01 06:39:53,526 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-05-01 06:39:53,590 INFO L142 QuantifierPusher]: treesize reduction 39, result has 73.3 percent of original size [2021-05-01 06:39:53,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-05-01 06:39:53,662 INFO L142 QuantifierPusher]: treesize reduction 71, result has 58.5 percent of original size [2021-05-01 06:39:53,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-05-01 06:39:53,727 INFO L142 QuantifierPusher]: treesize reduction 65, result has 58.1 percent of original size [2021-05-01 06:39:53,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-05-01 06:39:53,774 INFO L142 QuantifierPusher]: treesize reduction 48, result has 46.1 percent of original size [2021-05-01 06:39:53,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:39:53,808 INFO L142 QuantifierPusher]: treesize reduction 83, result has 49.4 percent of original size [2021-05-01 06:39:53,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-05-01 06:39:53,841 INFO L142 QuantifierPusher]: treesize reduction 19, result has 42.4 percent of original size [2021-05-01 06:39:53,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 06:39:53,854 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:39:53,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:39:53,868 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.0 percent of original size [2021-05-01 06:39:53,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:39:53,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:53,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:53,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:53,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:53,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:53,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:53,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519724285] [2021-05-01 06:39:53,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [519724285] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:53,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:53,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-01 06:39:53,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769367680] [2021-05-01 06:39:53,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-01 06:39:53,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:53,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-01 06:39:53,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-01 06:39:53,951 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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) [2021-05-01 06:39:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:54,555 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2021-05-01 06:39:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-01 06:39:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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 31 [2021-05-01 06:39:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:54,558 INFO L225 Difference]: With dead ends: 177 [2021-05-01 06:39:54,558 INFO L226 Difference]: Without dead ends: 175 [2021-05-01 06:39:54,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-05-01 06:39:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-01 06:39:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 89. [2021-05-01 06:39:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-05-01 06:39:54,573 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 31 [2021-05-01 06:39:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:54,574 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-05-01 06:39:54,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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) [2021-05-01 06:39:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-05-01 06:39:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-01 06:39:54,575 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:54,575 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:54,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-01 06:39:54,575 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 2 times [2021-05-01 06:39:54,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:54,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284599937] [2021-05-01 06:39:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:54,582 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:54,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:54,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,622 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-05-01 06:39:54,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:39:54,632 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:39:54,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:39:54,650 INFO L142 QuantifierPusher]: treesize reduction 9, result has 66.7 percent of original size [2021-05-01 06:39:54,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:39:54,659 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:39:54,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:39:54,673 INFO L142 QuantifierPusher]: treesize reduction 8, result has 77.8 percent of original size [2021-05-01 06:39:54,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:39:54,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:54,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:54,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:54,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:54,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:54,750 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:54,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284599937] [2021-05-01 06:39:54,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284599937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:54,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:54,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-01 06:39:54,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321043669] [2021-05-01 06:39:54,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-01 06:39:54,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-01 06:39:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-01 06:39:54,751 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-05-01 06:39:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:55,165 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2021-05-01 06:39:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-01 06:39:55,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 31 [2021-05-01 06:39:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:55,168 INFO L225 Difference]: With dead ends: 218 [2021-05-01 06:39:55,168 INFO L226 Difference]: Without dead ends: 216 [2021-05-01 06:39:55,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-01 06:39:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-01 06:39:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 112. [2021-05-01 06:39:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 105 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2021-05-01 06:39:55,211 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 31 [2021-05-01 06:39:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:55,211 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2021-05-01 06:39:55,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-05-01 06:39:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2021-05-01 06:39:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 06:39:55,212 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:55,213 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:55,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-01 06:39:55,213 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 1 times [2021-05-01 06:39:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:55,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631559863] [2021-05-01 06:39:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:55,220 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:55,221 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:55,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-01 06:39:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:55,305 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:55,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631559863] [2021-05-01 06:39:55,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [631559863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:55,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:55,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:39:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361395114] [2021-05-01 06:39:55,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:39:55,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:39:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:39:55,307 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:39:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:55,515 INFO L93 Difference]: Finished difference Result 254 states and 333 transitions. [2021-05-01 06:39:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 06:39:55,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-05-01 06:39:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:55,518 INFO L225 Difference]: With dead ends: 254 [2021-05-01 06:39:55,518 INFO L226 Difference]: Without dead ends: 185 [2021-05-01 06:39:55,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:39:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-01 06:39:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2021-05-01 06:39:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 124 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2021-05-01 06:39:55,537 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 33 [2021-05-01 06:39:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:55,537 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2021-05-01 06:39:55,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:39:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2021-05-01 06:39:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-01 06:39:55,539 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:55,539 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:55,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-01 06:39:55,539 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:55,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 2 times [2021-05-01 06:39:55,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:55,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443400665] [2021-05-01 06:39:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:55,542 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:55,543 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,566 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:55,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:55,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,620 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:55,621 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:55,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443400665] [2021-05-01 06:39:55,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [443400665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:55,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:55,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:39:55,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809054178] [2021-05-01 06:39:55,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:39:55,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:55,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:39:55,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:39:55,623 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-05-01 06:39:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:55,866 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2021-05-01 06:39:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-01 06:39:55,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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 34 [2021-05-01 06:39:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:55,868 INFO L225 Difference]: With dead ends: 240 [2021-05-01 06:39:55,869 INFO L226 Difference]: Without dead ends: 219 [2021-05-01 06:39:55,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-01 06:39:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-01 06:39:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2021-05-01 06:39:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 165 states have (on average 1.3393939393939394) internal successors, (221), 167 states have internal predecessors, (221), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2021-05-01 06:39:55,896 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 34 [2021-05-01 06:39:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:55,896 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2021-05-01 06:39:55,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-05-01 06:39:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2021-05-01 06:39:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-01 06:39:55,897 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:55,897 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:55,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-01 06:39:55,897 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:55,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 3 times [2021-05-01 06:39:55,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:55,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367077948] [2021-05-01 06:39:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:55,904 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:55,905 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:55,928 INFO L142 QuantifierPusher]: treesize reduction 13, result has 38.1 percent of original size [2021-05-01 06:39:55,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-05-01 06:39:55,934 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-05-01 06:39:55,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:55,961 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:55,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367077948] [2021-05-01 06:39:55,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367077948] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:55,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:55,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-01 06:39:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220704324] [2021-05-01 06:39:55,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 06:39:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 06:39:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-01 06:39:55,963 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-05-01 06:39:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:56,079 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2021-05-01 06:39:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-01 06:39:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 34 [2021-05-01 06:39:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:56,081 INFO L225 Difference]: With dead ends: 248 [2021-05-01 06:39:56,081 INFO L226 Difference]: Without dead ends: 143 [2021-05-01 06:39:56,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-01 06:39:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-01 06:39:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-05-01 06:39:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 131 states have (on average 1.297709923664122) internal successors, (170), 133 states have internal predecessors, (170), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2021-05-01 06:39:56,099 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 34 [2021-05-01 06:39:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:56,100 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2021-05-01 06:39:56,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-05-01 06:39:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2021-05-01 06:39:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-01 06:39:56,100 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:56,101 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:56,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-01 06:39:56,101 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:56,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 4 times [2021-05-01 06:39:56,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:56,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082604983] [2021-05-01 06:39:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:56,111 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:56,112 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:56,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:56,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:56,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:56,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:56,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:56,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,158 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:56,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:56,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:56,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:56,201 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:56,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082604983] [2021-05-01 06:39:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082604983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:56,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:56,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-01 06:39:56,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62760182] [2021-05-01 06:39:56,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-01 06:39:56,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:56,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-01 06:39:56,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:39:56,203 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-05-01 06:39:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:56,600 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-05-01 06:39:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-01 06:39:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 34 [2021-05-01 06:39:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:56,603 INFO L225 Difference]: With dead ends: 346 [2021-05-01 06:39:56,603 INFO L226 Difference]: Without dead ends: 308 [2021-05-01 06:39:56,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-01 06:39:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-01 06:39:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 173. [2021-05-01 06:39:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 166 states have internal predecessors, (214), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 222 transitions. [2021-05-01 06:39:56,627 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 222 transitions. Word has length 34 [2021-05-01 06:39:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:56,627 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 222 transitions. [2021-05-01 06:39:56,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-05-01 06:39:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 222 transitions. [2021-05-01 06:39:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-01 06:39:56,628 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:56,628 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:56,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-01 06:39:56,628 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 3 times [2021-05-01 06:39:56,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:56,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476094702] [2021-05-01 06:39:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:56,632 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:56,633 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:56,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,801 INFO L142 QuantifierPusher]: treesize reduction 15, result has 72.7 percent of original size [2021-05-01 06:39:56,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:39:56,825 INFO L142 QuantifierPusher]: treesize reduction 12, result has 88.0 percent of original size [2021-05-01 06:39:56,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-05-01 06:39:56,876 INFO L142 QuantifierPusher]: treesize reduction 22, result has 77.8 percent of original size [2021-05-01 06:39:56,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-05-01 06:39:56,911 INFO L142 QuantifierPusher]: treesize reduction 42, result has 76.9 percent of original size [2021-05-01 06:39:56,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-05-01 06:39:56,983 INFO L142 QuantifierPusher]: treesize reduction 47, result has 71.3 percent of original size [2021-05-01 06:39:56,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-05-01 06:39:57,046 INFO L142 QuantifierPusher]: treesize reduction 37, result has 73.0 percent of original size [2021-05-01 06:39:57,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-05-01 06:39:57,093 INFO L142 QuantifierPusher]: treesize reduction 42, result has 66.4 percent of original size [2021-05-01 06:39:57,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-05-01 06:39:57,145 INFO L142 QuantifierPusher]: treesize reduction 59, result has 54.3 percent of original size [2021-05-01 06:39:57,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-05-01 06:39:57,184 INFO L142 QuantifierPusher]: treesize reduction 42, result has 58.0 percent of original size [2021-05-01 06:39:57,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-05-01 06:39:57,220 INFO L142 QuantifierPusher]: treesize reduction 12, result has 60.0 percent of original size [2021-05-01 06:39:57,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:39:57,236 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:39:57,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:39:57,263 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.0 percent of original size [2021-05-01 06:39:57,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:39:57,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:57,294 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,294 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:57,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:57,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:57,355 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:57,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476094702] [2021-05-01 06:39:57,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [476094702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:57,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:57,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-01 06:39:57,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86771238] [2021-05-01 06:39:57,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-01 06:39:57,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-01 06:39:57,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-01 06:39:57,357 INFO L87 Difference]: Start difference. First operand 173 states and 222 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 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) [2021-05-01 06:39:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:57,896 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2021-05-01 06:39:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-01 06:39:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 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 37 [2021-05-01 06:39:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:57,898 INFO L225 Difference]: With dead ends: 200 [2021-05-01 06:39:57,898 INFO L226 Difference]: Without dead ends: 181 [2021-05-01 06:39:57,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-05-01 06:39:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-01 06:39:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2021-05-01 06:39:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 169 states have internal predecessors, (218), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2021-05-01 06:39:57,920 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 37 [2021-05-01 06:39:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:57,920 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2021-05-01 06:39:57,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 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) [2021-05-01 06:39:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2021-05-01 06:39:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-01 06:39:57,922 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:57,922 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:57,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-01 06:39:57,922 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 1 times [2021-05-01 06:39:57,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:57,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153426173] [2021-05-01 06:39:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:57,929 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:57,931 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:57,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:57,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:57,962 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-05-01 06:39:57,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:57,988 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:57,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153426173] [2021-05-01 06:39:57,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153426173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:57,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:57,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 06:39:57,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036937897] [2021-05-01 06:39:57,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 06:39:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 06:39:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:39:57,990 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-05-01 06:39:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:58,093 INFO L93 Difference]: Finished difference Result 280 states and 361 transitions. [2021-05-01 06:39:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-01 06:39:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 37 [2021-05-01 06:39:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:58,095 INFO L225 Difference]: With dead ends: 280 [2021-05-01 06:39:58,095 INFO L226 Difference]: Without dead ends: 200 [2021-05-01 06:39:58,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:39:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-01 06:39:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2021-05-01 06:39:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 171 states have internal predecessors, (217), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2021-05-01 06:39:58,118 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 37 [2021-05-01 06:39:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:58,118 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2021-05-01 06:39:58,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-05-01 06:39:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2021-05-01 06:39:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-01 06:39:58,119 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:58,119 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:58,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-01 06:39:58,119 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 5 times [2021-05-01 06:39:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:58,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737101412] [2021-05-01 06:39:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:58,127 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:58,129 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,184 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-05-01 06:39:58,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:39:58,194 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:39:58,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:39:58,212 INFO L142 QuantifierPusher]: treesize reduction 10, result has 77.3 percent of original size [2021-05-01 06:39:58,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:39:58,234 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.0 percent of original size [2021-05-01 06:39:58,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:39:58,239 INFO L142 QuantifierPusher]: treesize reduction 9, result has 66.7 percent of original size [2021-05-01 06:39:58,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:39:58,248 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:39:58,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:39:58,257 INFO L142 QuantifierPusher]: treesize reduction 8, result has 77.8 percent of original size [2021-05-01 06:39:58,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:39:58,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:58,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:58,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737101412] [2021-05-01 06:39:58,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [737101412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:58,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-01 06:39:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591752662] [2021-05-01 06:39:58,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-01 06:39:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-01 06:39:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-01 06:39:58,327 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-05-01 06:39:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:58,735 INFO L93 Difference]: Finished difference Result 268 states and 341 transitions. [2021-05-01 06:39:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-01 06:39:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 37 [2021-05-01 06:39:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:58,737 INFO L225 Difference]: With dead ends: 268 [2021-05-01 06:39:58,737 INFO L226 Difference]: Without dead ends: 266 [2021-05-01 06:39:58,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-01 06:39:58,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-01 06:39:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 162. [2021-05-01 06:39:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 153 states have (on average 1.2810457516339868) internal successors, (196), 155 states have internal predecessors, (196), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:39:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2021-05-01 06:39:58,763 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 37 [2021-05-01 06:39:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:58,763 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2021-05-01 06:39:58,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-05-01 06:39:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2021-05-01 06:39:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-01 06:39:58,764 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:58,764 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:58,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-01 06:39:58,764 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 1 times [2021-05-01 06:39:58,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:58,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144348142] [2021-05-01 06:39:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:58,771 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:58,772 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:39:58,817 INFO L142 QuantifierPusher]: treesize reduction 19, result has 71.2 percent of original size [2021-05-01 06:39:58,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:39:58,844 INFO L142 QuantifierPusher]: treesize reduction 19, result has 74.3 percent of original size [2021-05-01 06:39:58,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-05-01 06:39:58,867 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:39:58,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:39:58,875 INFO L142 QuantifierPusher]: treesize reduction 9, result has 60.9 percent of original size [2021-05-01 06:39:58,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 06:39:58,888 INFO L142 QuantifierPusher]: treesize reduction 27, result has 67.1 percent of original size [2021-05-01 06:39:58,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-05-01 06:39:58,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 06:39:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:58,954 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:58,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144348142] [2021-05-01 06:39:58,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144348142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:58,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:58,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-01 06:39:58,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481993620] [2021-05-01 06:39:58,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-01 06:39:58,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:58,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-01 06:39:58,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-01 06:39:58,956 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:39:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:59,497 INFO L93 Difference]: Finished difference Result 312 states and 399 transitions. [2021-05-01 06:39:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-01 06:39:59,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-05-01 06:39:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:59,500 INFO L225 Difference]: With dead ends: 312 [2021-05-01 06:39:59,500 INFO L226 Difference]: Without dead ends: 310 [2021-05-01 06:39:59,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-01 06:39:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-01 06:39:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 231. [2021-05-01 06:39:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 222 states have internal predecessors, (281), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:39:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 293 transitions. [2021-05-01 06:39:59,534 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 293 transitions. Word has length 39 [2021-05-01 06:39:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:59,534 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 293 transitions. [2021-05-01 06:39:59,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:39:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 293 transitions. [2021-05-01 06:39:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-01 06:39:59,536 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:59,536 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:59,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-01 06:39:59,536 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:59,537 INFO L82 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 4 times [2021-05-01 06:39:59,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:59,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675322554] [2021-05-01 06:39:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:59,539 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:59,540 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:59,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:59,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:59,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:59,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,577 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:59,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:59,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:59,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:59,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:59,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:39:59,636 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675322554] [2021-05-01 06:39:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675322554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:59,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:59,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-01 06:39:59,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090098684] [2021-05-01 06:39:59,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-01 06:39:59,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:59,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-01 06:39:59,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:39:59,637 INFO L87 Difference]: Start difference. First operand 231 states and 293 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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) [2021-05-01 06:40:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:00,061 INFO L93 Difference]: Finished difference Result 498 states and 642 transitions. [2021-05-01 06:40:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-01 06:40:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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 40 [2021-05-01 06:40:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:00,066 INFO L225 Difference]: With dead ends: 498 [2021-05-01 06:40:00,066 INFO L226 Difference]: Without dead ends: 466 [2021-05-01 06:40:00,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-01 06:40:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-01 06:40:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 315. [2021-05-01 06:40:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 303 states have (on average 1.3135313531353134) internal successors, (398), 306 states have internal predecessors, (398), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2021-05-01 06:40:00,137 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 40 [2021-05-01 06:40:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:00,137 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2021-05-01 06:40:00,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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) [2021-05-01 06:40:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2021-05-01 06:40:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-01 06:40:00,138 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:00,138 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:00,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-01 06:40:00,138 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 2 times [2021-05-01 06:40:00,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:00,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631526525] [2021-05-01 06:40:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:00,145 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:00,146 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:00,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,277 INFO L142 QuantifierPusher]: treesize reduction 6, result has 86.0 percent of original size [2021-05-01 06:40:00,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:00,298 INFO L142 QuantifierPusher]: treesize reduction 23, result has 67.6 percent of original size [2021-05-01 06:40:00,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-05-01 06:40:00,325 INFO L142 QuantifierPusher]: treesize reduction 36, result has 64.0 percent of original size [2021-05-01 06:40:00,326 INFO L147 QuantifierPusher]: treesize reduction 6, result has 90.6 percent of original size 58 [2021-05-01 06:40:00,350 INFO L142 QuantifierPusher]: treesize reduction 16, result has 82.2 percent of original size [2021-05-01 06:40:00,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-05-01 06:40:00,395 INFO L142 QuantifierPusher]: treesize reduction 29, result has 82.6 percent of original size [2021-05-01 06:40:00,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-05-01 06:40:00,453 INFO L142 QuantifierPusher]: treesize reduction 54, result has 69.3 percent of original size [2021-05-01 06:40:00,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-05-01 06:40:00,518 INFO L142 QuantifierPusher]: treesize reduction 35, result has 76.8 percent of original size [2021-05-01 06:40:00,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-05-01 06:40:00,532 INFO L142 QuantifierPusher]: treesize reduction 18, result has 73.9 percent of original size [2021-05-01 06:40:00,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-05-01 06:40:00,546 INFO L142 QuantifierPusher]: treesize reduction 43, result has 68.6 percent of original size [2021-05-01 06:40:00,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-05-01 06:40:00,561 INFO L142 QuantifierPusher]: treesize reduction 44, result has 71.6 percent of original size [2021-05-01 06:40:00,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-05-01 06:40:00,600 INFO L142 QuantifierPusher]: treesize reduction 27, result has 67.1 percent of original size [2021-05-01 06:40:00,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-05-01 06:40:00,624 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:40:00,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:40:00,634 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.0 percent of original size [2021-05-01 06:40:00,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:40:00,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:00,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:00,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:00,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:00,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:00,709 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:00,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631526525] [2021-05-01 06:40:00,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [631526525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:00,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:00,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-01 06:40:00,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890747829] [2021-05-01 06:40:00,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-01 06:40:00,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:00,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-01 06:40:00,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-01 06:40:00,710 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2021-05-01 06:40:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:01,582 INFO L93 Difference]: Finished difference Result 734 states and 962 transitions. [2021-05-01 06:40:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-01 06:40:01,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 40 [2021-05-01 06:40:01,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:01,586 INFO L225 Difference]: With dead ends: 734 [2021-05-01 06:40:01,586 INFO L226 Difference]: Without dead ends: 732 [2021-05-01 06:40:01,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 654.1ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-05-01 06:40:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-05-01 06:40:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 490. [2021-05-01 06:40:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 478 states have (on average 1.3577405857740585) internal successors, (649), 481 states have internal predecessors, (649), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 661 transitions. [2021-05-01 06:40:01,700 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 661 transitions. Word has length 40 [2021-05-01 06:40:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:01,700 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 661 transitions. [2021-05-01 06:40:01,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2021-05-01 06:40:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 661 transitions. [2021-05-01 06:40:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 06:40:01,701 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:01,702 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:01,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-01 06:40:01,702 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1909650267, now seen corresponding path program 5 times [2021-05-01 06:40:01,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:01,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049745301] [2021-05-01 06:40:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:01,705 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:01,706 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:01,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:01,901 INFO L142 QuantifierPusher]: treesize reduction 34, result has 67.9 percent of original size [2021-05-01 06:40:01,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-05-01 06:40:01,944 INFO L142 QuantifierPusher]: treesize reduction 50, result has 62.4 percent of original size [2021-05-01 06:40:01,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-05-01 06:40:01,995 INFO L142 QuantifierPusher]: treesize reduction 56, result has 58.8 percent of original size [2021-05-01 06:40:01,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-05-01 06:40:02,042 INFO L142 QuantifierPusher]: treesize reduction 79, result has 62.2 percent of original size [2021-05-01 06:40:02,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-05-01 06:40:02,094 INFO L142 QuantifierPusher]: treesize reduction 97, result has 58.2 percent of original size [2021-05-01 06:40:02,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-05-01 06:40:02,164 INFO L142 QuantifierPusher]: treesize reduction 62, result has 65.9 percent of original size [2021-05-01 06:40:02,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-05-01 06:40:02,215 INFO L142 QuantifierPusher]: treesize reduction 61, result has 67.2 percent of original size [2021-05-01 06:40:02,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-05-01 06:40:02,283 INFO L142 QuantifierPusher]: treesize reduction 71, result has 65.0 percent of original size [2021-05-01 06:40:02,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-05-01 06:40:02,359 INFO L142 QuantifierPusher]: treesize reduction 61, result has 65.7 percent of original size [2021-05-01 06:40:02,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-05-01 06:40:02,418 INFO L142 QuantifierPusher]: treesize reduction 68, result has 61.4 percent of original size [2021-05-01 06:40:02,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-05-01 06:40:02,473 INFO L142 QuantifierPusher]: treesize reduction 82, result has 53.7 percent of original size [2021-05-01 06:40:02,478 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-05-01 06:40:02,541 INFO L142 QuantifierPusher]: treesize reduction 68, result has 55.0 percent of original size [2021-05-01 06:40:02,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-05-01 06:40:02,602 INFO L142 QuantifierPusher]: treesize reduction 31, result has 53.0 percent of original size [2021-05-01 06:40:02,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:02,645 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-05-01 06:40:02,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:40:02,666 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.0 percent of original size [2021-05-01 06:40:02,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:40:02,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:02,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:02,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:02,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:02,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:02,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:02,812 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:02,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049745301] [2021-05-01 06:40:02,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049745301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:02,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:02,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-01 06:40:02,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192131189] [2021-05-01 06:40:02,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-01 06:40:02,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:02,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-01 06:40:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-01 06:40:02,815 INFO L87 Difference]: Start difference. First operand 490 states and 661 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 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) [2021-05-01 06:40:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:03,587 INFO L93 Difference]: Finished difference Result 520 states and 694 transitions. [2021-05-01 06:40:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-01 06:40:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 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 43 [2021-05-01 06:40:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:03,590 INFO L225 Difference]: With dead ends: 520 [2021-05-01 06:40:03,591 INFO L226 Difference]: Without dead ends: 498 [2021-05-01 06:40:03,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-05-01 06:40:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-01 06:40:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 493. [2021-05-01 06:40:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 481 states have (on average 1.3575883575883576) internal successors, (653), 484 states have internal predecessors, (653), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 665 transitions. [2021-05-01 06:40:03,693 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 665 transitions. Word has length 43 [2021-05-01 06:40:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:03,693 INFO L480 AbstractCegarLoop]: Abstraction has 493 states and 665 transitions. [2021-05-01 06:40:03,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 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) [2021-05-01 06:40:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 665 transitions. [2021-05-01 06:40:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-01 06:40:03,694 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:03,694 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:03,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-01 06:40:03,694 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:03,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash -383539670, now seen corresponding path program 2 times [2021-05-01 06:40:03,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:03,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831807687] [2021-05-01 06:40:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:03,702 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:03,703 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:03,726 INFO L142 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-05-01 06:40:03,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:03,732 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:03,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:03,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:03,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:03,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:03,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-01 06:40:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:03,795 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:03,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831807687] [2021-05-01 06:40:03,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831807687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:03,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:03,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-01 06:40:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138897395] [2021-05-01 06:40:03,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-01 06:40:03,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:03,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-01 06:40:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:40:03,798 INFO L87 Difference]: Start difference. First operand 493 states and 665 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:04,096 INFO L93 Difference]: Finished difference Result 844 states and 1125 transitions. [2021-05-01 06:40:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 06:40:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-05-01 06:40:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:04,099 INFO L225 Difference]: With dead ends: 844 [2021-05-01 06:40:04,099 INFO L226 Difference]: Without dead ends: 535 [2021-05-01 06:40:04,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-01 06:40:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-01 06:40:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 407. [2021-05-01 06:40:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 395 states have (on average 1.3341772151898734) internal successors, (527), 398 states have internal predecessors, (527), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 539 transitions. [2021-05-01 06:40:04,171 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 539 transitions. Word has length 45 [2021-05-01 06:40:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:04,171 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 539 transitions. [2021-05-01 06:40:04,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 539 transitions. [2021-05-01 06:40:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-01 06:40:04,172 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:04,172 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:04,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-01 06:40:04,173 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash 651363238, now seen corresponding path program 3 times [2021-05-01 06:40:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093022935] [2021-05-01 06:40:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:04,179 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:04,180 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,210 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:04,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 06:40:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-01 06:40:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:04,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093022935] [2021-05-01 06:40:04,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093022935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:04,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:04,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-01 06:40:04,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233519771] [2021-05-01 06:40:04,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-01 06:40:04,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-01 06:40:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:40:04,275 INFO L87 Difference]: Start difference. First operand 407 states and 539 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:40:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:04,694 INFO L93 Difference]: Finished difference Result 775 states and 1004 transitions. [2021-05-01 06:40:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-01 06:40:04,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-05-01 06:40:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:04,697 INFO L225 Difference]: With dead ends: 775 [2021-05-01 06:40:04,697 INFO L226 Difference]: Without dead ends: 595 [2021-05-01 06:40:04,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-01 06:40:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-05-01 06:40:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 440. [2021-05-01 06:40:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 426 states have (on average 1.307511737089202) internal successors, (557), 430 states have internal predecessors, (557), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 06:40:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 573 transitions. [2021-05-01 06:40:04,778 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 573 transitions. Word has length 47 [2021-05-01 06:40:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:04,778 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 573 transitions. [2021-05-01 06:40:04,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 06:40:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 573 transitions. [2021-05-01 06:40:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-01 06:40:04,779 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:04,779 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:04,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-01 06:40:04,780 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1904691350, now seen corresponding path program 6 times [2021-05-01 06:40:04,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:04,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024232383] [2021-05-01 06:40:04,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:04,783 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:04,784 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,815 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,815 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:04,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:04,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:04,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:04,902 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:04,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024232383] [2021-05-01 06:40:04,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024232383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:04,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:04,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-01 06:40:04,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903690252] [2021-05-01 06:40:04,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-01 06:40:04,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:04,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-01 06:40:04,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-01 06:40:04,903 INFO L87 Difference]: Start difference. First operand 440 states and 573 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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) [2021-05-01 06:40:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:05,455 INFO L93 Difference]: Finished difference Result 1037 states and 1338 transitions. [2021-05-01 06:40:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-01 06:40:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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 46 [2021-05-01 06:40:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:05,460 INFO L225 Difference]: With dead ends: 1037 [2021-05-01 06:40:05,460 INFO L226 Difference]: Without dead ends: 997 [2021-05-01 06:40:05,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-05-01 06:40:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-05-01 06:40:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 597. [2021-05-01 06:40:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 583 states have (on average 1.3379073756432247) internal successors, (780), 587 states have internal predecessors, (780), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 06:40:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 796 transitions. [2021-05-01 06:40:05,567 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 796 transitions. Word has length 46 [2021-05-01 06:40:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:05,567 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 796 transitions. [2021-05-01 06:40:05,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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) [2021-05-01 06:40:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 796 transitions. [2021-05-01 06:40:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-01 06:40:05,569 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:05,569 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:05,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-01 06:40:05,569 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1776596685, now seen corresponding path program 3 times [2021-05-01 06:40:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:05,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024000090] [2021-05-01 06:40:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:05,575 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:05,576 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:05,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:05,649 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:05,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024000090] [2021-05-01 06:40:05,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024000090] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:05,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:05,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:40:05,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525993051] [2021-05-01 06:40:05,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:40:05,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:05,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:40:05,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:40:05,650 INFO L87 Difference]: Start difference. First operand 597 states and 796 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-05-01 06:40:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:05,948 INFO L93 Difference]: Finished difference Result 1132 states and 1484 transitions. [2021-05-01 06:40:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 06:40:05,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 46 [2021-05-01 06:40:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:05,952 INFO L225 Difference]: With dead ends: 1132 [2021-05-01 06:40:05,952 INFO L226 Difference]: Without dead ends: 849 [2021-05-01 06:40:05,953 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:40:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-05-01 06:40:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 687. [2021-05-01 06:40:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 673 states have (on average 1.325408618127786) internal successors, (892), 677 states have internal predecessors, (892), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 06:40:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 908 transitions. [2021-05-01 06:40:06,082 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 908 transitions. Word has length 46 [2021-05-01 06:40:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:06,082 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 908 transitions. [2021-05-01 06:40:06,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-05-01 06:40:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 908 transitions. [2021-05-01 06:40:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-01 06:40:06,084 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:06,084 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:06,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-01 06:40:06,084 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:06,084 INFO L82 PathProgramCache]: Analyzing trace with hash -218065925, now seen corresponding path program 4 times [2021-05-01 06:40:06,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:06,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009434919] [2021-05-01 06:40:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:06,089 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:06,090 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:06,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,111 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:06,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,114 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:06,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:06,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:06,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:06,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:06,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:06,168 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:06,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009434919] [2021-05-01 06:40:06,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009434919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:06,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:06,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:40:06,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531633390] [2021-05-01 06:40:06,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:40:06,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:40:06,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:40:06,169 INFO L87 Difference]: Start difference. First operand 687 states and 908 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-05-01 06:40:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:06,454 INFO L93 Difference]: Finished difference Result 883 states and 1130 transitions. [2021-05-01 06:40:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 06:40:06,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 46 [2021-05-01 06:40:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:06,457 INFO L225 Difference]: With dead ends: 883 [2021-05-01 06:40:06,458 INFO L226 Difference]: Without dead ends: 680 [2021-05-01 06:40:06,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-01 06:40:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-05-01 06:40:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 620. [2021-05-01 06:40:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 606 states have (on average 1.297029702970297) internal successors, (786), 610 states have internal predecessors, (786), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 06:40:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 802 transitions. [2021-05-01 06:40:06,562 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 802 transitions. Word has length 46 [2021-05-01 06:40:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:06,563 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 802 transitions. [2021-05-01 06:40:06,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-05-01 06:40:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 802 transitions. [2021-05-01 06:40:06,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-01 06:40:06,564 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:06,564 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:06,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-01 06:40:06,564 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash 983274622, now seen corresponding path program 1 times [2021-05-01 06:40:06,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:06,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478748252] [2021-05-01 06:40:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:06,570 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:06,571 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:06,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,714 INFO L142 QuantifierPusher]: treesize reduction 16, result has 85.0 percent of original size [2021-05-01 06:40:06,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-05-01 06:40:06,784 INFO L142 QuantifierPusher]: treesize reduction 10, result has 92.8 percent of original size [2021-05-01 06:40:06,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-05-01 06:40:06,883 INFO L142 QuantifierPusher]: treesize reduction 41, result has 79.9 percent of original size [2021-05-01 06:40:06,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-05-01 06:40:06,976 INFO L142 QuantifierPusher]: treesize reduction 41, result has 68.7 percent of original size [2021-05-01 06:40:06,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-05-01 06:40:07,034 INFO L142 QuantifierPusher]: treesize reduction 20, result has 78.5 percent of original size [2021-05-01 06:40:07,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-05-01 06:40:07,095 INFO L142 QuantifierPusher]: treesize reduction 103, result has 64.8 percent of original size [2021-05-01 06:40:07,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-05-01 06:40:07,192 INFO L142 QuantifierPusher]: treesize reduction 109, result has 71.3 percent of original size [2021-05-01 06:40:07,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 271 [2021-05-01 06:40:07,340 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-05-01 06:40:07,359 INFO L142 QuantifierPusher]: treesize reduction 101, result has 75.1 percent of original size [2021-05-01 06:40:07,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 304 [2021-05-01 06:40:07,544 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2021-05-01 06:40:07,549 INFO L142 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size [2021-05-01 06:40:07,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-05-01 06:40:07,669 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-05-01 06:40:07,681 INFO L142 QuantifierPusher]: treesize reduction 72, result has 81.4 percent of original size [2021-05-01 06:40:07,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 316 [2021-05-01 06:40:07,721 INFO L142 QuantifierPusher]: treesize reduction 62, result has 75.6 percent of original size [2021-05-01 06:40:07,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-05-01 06:40:07,790 INFO L142 QuantifierPusher]: treesize reduction 51, result has 73.8 percent of original size [2021-05-01 06:40:07,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-05-01 06:40:07,836 INFO L142 QuantifierPusher]: treesize reduction 6, result has 82.9 percent of original size [2021-05-01 06:40:07,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:07,861 INFO L142 QuantifierPusher]: treesize reduction 7, result has 65.0 percent of original size [2021-05-01 06:40:07,862 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:07,863 INFO L142 QuantifierPusher]: treesize reduction 17, result has 68.5 percent of original size [2021-05-01 06:40:07,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:07,890 INFO L142 QuantifierPusher]: treesize reduction 23, result has 55.8 percent of original size [2021-05-01 06:40:07,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:07,916 INFO L142 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-05-01 06:40:07,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:07,918 INFO L142 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-05-01 06:40:07,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:07,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:07,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:07,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:07,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-01 06:40:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:07,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:07,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:08,006 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:08,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478748252] [2021-05-01 06:40:08,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [478748252] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:08,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:08,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-01 06:40:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060381345] [2021-05-01 06:40:08,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-01 06:40:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-01 06:40:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-01 06:40:08,007 INFO L87 Difference]: Start difference. First operand 620 states and 802 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:08,396 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-05-01 06:40:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:09,389 INFO L93 Difference]: Finished difference Result 773 states and 988 transitions. [2021-05-01 06:40:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-01 06:40:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-05-01 06:40:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:09,392 INFO L225 Difference]: With dead ends: 773 [2021-05-01 06:40:09,392 INFO L226 Difference]: Without dead ends: 724 [2021-05-01 06:40:09,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1863.9ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-05-01 06:40:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-05-01 06:40:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 642. [2021-05-01 06:40:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 628 states have (on average 1.2961783439490446) internal successors, (814), 632 states have internal predecessors, (814), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 06:40:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 830 transitions. [2021-05-01 06:40:09,514 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 830 transitions. Word has length 48 [2021-05-01 06:40:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:09,514 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 830 transitions. [2021-05-01 06:40:09,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 830 transitions. [2021-05-01 06:40:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-01 06:40:09,516 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:09,516 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:09,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-01 06:40:09,516 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:09,516 INFO L82 PathProgramCache]: Analyzing trace with hash 849261116, now seen corresponding path program 1 times [2021-05-01 06:40:09,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:09,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475226028] [2021-05-01 06:40:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:09,522 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:09,523 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:40:09,545 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:40:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:40:09,590 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:40:09,624 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-01 06:40:09,624 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 06:40:09,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-01 06:40:09,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 06:40:09 BoogieIcfgContainer [2021-05-01 06:40:09,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 06:40:09,649 INFO L168 Benchmark]: Toolchain (without parser) took 19853.76 ms. Allocated memory was 201.3 MB in the beginning and 532.7 MB in the end (delta: 331.4 MB). Free memory was 166.3 MB in the beginning and 387.6 MB in the end (delta: -221.3 MB). Peak memory consumption was 109.8 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:09,649 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 06:40:09,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.82 ms. Allocated memory is still 201.3 MB. Free memory was 166.1 MB in the beginning and 182.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:09,649 INFO L168 Benchmark]: Boogie Preprocessor took 64.71 ms. Allocated memory is still 201.3 MB. Free memory was 182.8 MB in the beginning and 180.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:09,649 INFO L168 Benchmark]: RCFGBuilder took 501.11 ms. Allocated memory is still 201.3 MB. Free memory was 180.7 MB in the beginning and 158.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:09,649 INFO L168 Benchmark]: TraceAbstraction took 18951.42 ms. Allocated memory was 201.3 MB in the beginning and 532.7 MB in the end (delta: 331.4 MB). Free memory was 157.7 MB in the beginning and 387.6 MB in the end (delta: -230.0 MB). Peak memory consumption was 102.3 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:09,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 328.82 ms. Allocated memory is still 201.3 MB. Free memory was 166.1 MB in the beginning and 182.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.71 ms. Allocated memory is still 201.3 MB. Free memory was 182.8 MB in the beginning and 180.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 501.11 ms. Allocated memory is still 201.3 MB. Free memory was 180.7 MB in the beginning and 158.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18951.42 ms. Allocated memory was 201.3 MB in the beginning and 532.7 MB in the end (delta: 331.4 MB). Free memory was 157.7 MB in the beginning and 387.6 MB in the end (delta: -230.0 MB). Peak memory consumption was 102.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 [L30] COND TRUE i < nodecount [L31] COND TRUE i == source [L32] distance[i] = 0 [L30] i++ [L30] COND TRUE i < nodecount [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY [L30] i++ [L30] COND FALSE !(i < nodecount) [L39] i = 0 [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND FALSE !(i < nodecount) [L51] i = 0 [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ [L51] COND FALSE !(i < edgecount) [L61] i = 0 [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND FALSE !(!(cond)) [L63] RET __VERIFIER_assert(distance[i]>=0) [L61] i++ [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18889.6ms, OverallIterations: 26, TraceHistogramMax: 4, EmptinessCheckTime: 35.8ms, AutomataDifference: 10206.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1003 SDtfs, 2086 SDslu, 2981 SDs, 0 SdLazy, 6397 SolverSat, 921 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4216.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 430 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 7095.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=687occurred in iteration=23, InterpolantAutomatonStates: 279, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1252.5ms AutomataMinimizationTime, 25 MinimizatonAttempts, 2145 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...