/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/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 06:39:52,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 06:39:52,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 06:39:52,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 06:39:52,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 06:39:52,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 06:39:52,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 06:39:52,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 06:39:52,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 06:39:52,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 06:39:52,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 06:39:52,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 06:39:52,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 06:39:52,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 06:39:52,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 06:39:52,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 06:39:52,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 06:39:52,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 06:39:52,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 06:39:52,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 06:39:52,338 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 06:39:52,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 06:39:52,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 06:39:52,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 06:39:52,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 06:39:52,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 06:39:52,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 06:39:52,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 06:39:52,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 06:39:52,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 06:39:52,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 06:39:52,347 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 06:39:52,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 06:39:52,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 06:39:52,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 06:39:52,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 06:39:52,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 06:39:52,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 06:39:52,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 06:39:52,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 06:39:52,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 06:39:52,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 06:39:52,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 06:39:52,348 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 06:39:52,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 06:39:52,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 06:39:52,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 06:39:52,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 06:39:52,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 06:39:52,576 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 06:39:52,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-01 06:39:52,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef88b6fb4/10946b9e4ace438cb2aa84160cec5c59/FLAG653638848 [2021-05-01 06:39:53,006 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 06:39:53,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-01 06:39:53,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef88b6fb4/10946b9e4ace438cb2aa84160cec5c59/FLAG653638848 [2021-05-01 06:39:53,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef88b6fb4/10946b9e4ace438cb2aa84160cec5c59 [2021-05-01 06:39:53,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 06:39:53,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 06:39:53,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 06:39:53,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 06:39:53,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 06:39:53,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ede23db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53, skipping insertion in model container [2021-05-01 06:39:53,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 06:39:53,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 06:39:53,149 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/insertion_sort-1.c[328,341] [2021-05-01 06:39:53,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:39:53,170 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 06:39:53,180 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/insertion_sort-1.c[328,341] [2021-05-01 06:39:53,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:39:53,210 INFO L208 MainTranslator]: Completed translation [2021-05-01 06:39:53,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53 WrapperNode [2021-05-01 06:39:53,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 06:39:53,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 06:39:53,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 06:39:53,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 06:39:53,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (1/1) ... [2021-05-01 06:39:53,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 06:39:53,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 06:39:53,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 06:39:53,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 06:39:53,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (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 06:39:53,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 06:39:53,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 06:39:53,317 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 06:39:53,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 06:39:53,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 06:39:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 06:39:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 06:39:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 06:39:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 06:39:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 06:39:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-01 06:39:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 06:39:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 06:39:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 06:39:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 06:39:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 06:39:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 06:39:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 06:39:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 06:39:53,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 06:39:53,609 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-01 06:39:53,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:39:53 BoogieIcfgContainer [2021-05-01 06:39:53,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 06:39:53,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 06:39:53,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 06:39:53,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 06:39:53,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 06:39:53" (1/3) ... [2021-05-01 06:39:53,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c10e238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:39:53, skipping insertion in model container [2021-05-01 06:39:53,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:39:53" (2/3) ... [2021-05-01 06:39:53,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c10e238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:39:53, skipping insertion in model container [2021-05-01 06:39:53,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:39:53" (3/3) ... [2021-05-01 06:39:53,618 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-05-01 06:39:53,621 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 06:39:53,624 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 06:39:53,636 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 06:39:53,657 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 06:39:53,658 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 06:39:53,658 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 06:39:53,658 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 06:39:53,658 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 06:39:53,658 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 06:39:53,658 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 06:39:53,658 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 06:39:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 06:39:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-01 06:39:53,681 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:53,682 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:53,682 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2021-05-01 06:39:53,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:53,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563197606] [2021-05-01 06:39:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:53,741 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:53,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:53,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:53,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:53,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:53,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:53,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:54,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,010 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 06:39:54,012 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563197606] [2021-05-01 06:39:54,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563197606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:54,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:54,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-01 06:39:54,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999129691] [2021-05-01 06:39:54,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 06:39:54,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:54,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 06:39:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-01 06:39:54,030 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 06:39:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:54,248 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-05-01 06:39:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 06:39:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-01 06:39:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:54,255 INFO L225 Difference]: With dead ends: 67 [2021-05-01 06:39:54,255 INFO L226 Difference]: Without dead ends: 30 [2021-05-01 06:39:54,257 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:39:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-01 06:39:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-01 06:39:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 06:39:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-05-01 06:39:54,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-05-01 06:39:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:54,281 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-05-01 06:39:54,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 06:39:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-05-01 06:39:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-01 06:39:54,282 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:54,282 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:54,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 06:39:54,282 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2021-05-01 06:39:54,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:54,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321157027] [2021-05-01 06:39:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:54,296 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:54,298 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:54,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:54,354 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-05-01 06:39:54,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:39:54,400 INFO L142 QuantifierPusher]: treesize reduction 2, result has 97.1 percent of original size [2021-05-01 06:39:54,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-05-01 06:39:54,497 INFO L142 QuantifierPusher]: treesize reduction 21, result has 61.8 percent of original size [2021-05-01 06:39:54,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:39:54,532 INFO L142 QuantifierPusher]: treesize reduction 22, result has 66.7 percent of original size [2021-05-01 06:39:54,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-05-01 06:39:54,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:54,646 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,655 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 06:39:54,655 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:54,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321157027] [2021-05-01 06:39:54,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1321157027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:54,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:54,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:39:54,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311581799] [2021-05-01 06:39:54,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:39:54,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:54,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:39:54,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:39:54,657 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 06:39:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:54,887 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-05-01 06:39:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 06:39:54,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-01 06:39:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:54,892 INFO L225 Difference]: With dead ends: 55 [2021-05-01 06:39:54,892 INFO L226 Difference]: Without dead ends: 32 [2021-05-01 06:39:54,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:39:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-01 06:39:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-01 06:39:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 06:39:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-05-01 06:39:54,911 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2021-05-01 06:39:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:54,911 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-05-01 06:39:54,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 06:39:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-05-01 06:39:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 06:39:54,912 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:54,912 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:54,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 06:39:54,912 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 440297925, now seen corresponding path program 2 times [2021-05-01 06:39:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:54,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736925698] [2021-05-01 06:39:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:54,919 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:54,920 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:54,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:54,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:54,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:54,995 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-05-01 06:39:54,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:39:55,017 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.2 percent of original size [2021-05-01 06:39:55,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:39:55,043 INFO L142 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size [2021-05-01 06:39:55,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:39:55,060 INFO L142 QuantifierPusher]: treesize reduction 20, result has 31.0 percent of original size [2021-05-01 06:39:55,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:39:55,072 INFO L142 QuantifierPusher]: treesize reduction 12, result has 75.0 percent of original size [2021-05-01 06:39:55,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:39:55,098 INFO L142 QuantifierPusher]: treesize reduction 39, result has 2.5 percent of original size [2021-05-01 06:39:55,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,139 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 06:39:55,140 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736925698] [2021-05-01 06:39:55,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [736925698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:55,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:55,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 06:39:55,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601686538] [2021-05-01 06:39:55,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 06:39:55,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 06:39:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:39:55,141 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 06:39:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:55,389 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-01 06:39:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 06:39:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 06:39:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:55,393 INFO L225 Difference]: With dead ends: 64 [2021-05-01 06:39:55,393 INFO L226 Difference]: Without dead ends: 53 [2021-05-01 06:39:55,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:39:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-01 06:39:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2021-05-01 06:39:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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 06:39:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-01 06:39:55,414 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2021-05-01 06:39:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:55,414 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-01 06:39:55,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 06:39:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-01 06:39:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-01 06:39:55,415 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:55,415 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] [2021-05-01 06:39:55,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 06:39:55,415 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2021-05-01 06:39:55,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:55,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529912375] [2021-05-01 06:39:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:55,422 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:55,423 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:55,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:55,523 INFO L142 QuantifierPusher]: treesize reduction 10, result has 64.3 percent of original size [2021-05-01 06:39:55,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:39:55,536 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:39:55,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:39:55,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,542 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:39:55,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:55,551 INFO L142 QuantifierPusher]: treesize reduction 43, result has 47.6 percent of original size [2021-05-01 06:39:55,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:39:55,576 INFO L142 QuantifierPusher]: treesize reduction 35, result has 62.4 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 58 [2021-05-01 06:39:55,610 INFO L142 QuantifierPusher]: treesize reduction 35, result has 66.3 percent of original size [2021-05-01 06:39:55,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-05-01 06:39:55,653 INFO L142 QuantifierPusher]: treesize reduction 35, result has 65.7 percent of original size [2021-05-01 06:39:55,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-05-01 06:39:55,698 INFO L142 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-05-01 06:39:55,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:39:55,717 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:39:55,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:39:55,728 INFO L142 QuantifierPusher]: treesize reduction 17, result has 67.9 percent of original size [2021-05-01 06:39:55,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:39:55,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:55,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:55,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,764 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:55,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:55,803 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:55,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:55,803 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 06:39:55,804 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529912375] [2021-05-01 06:39:55,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [529912375] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:55,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:55,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-01 06:39:55,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701157589] [2021-05-01 06:39:55,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-01 06:39:55,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:55,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-01 06:39:55,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-01 06:39:55,805 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 06:39:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:56,268 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-01 06:39:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-01 06:39:56,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 06:39:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:56,270 INFO L225 Difference]: With dead ends: 86 [2021-05-01 06:39:56,270 INFO L226 Difference]: Without dead ends: 67 [2021-05-01 06:39:56,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-05-01 06:39:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-01 06:39:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-05-01 06:39:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 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 06:39:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-05-01 06:39:56,279 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2021-05-01 06:39:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:56,279 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-05-01 06:39:56,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 06:39:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-05-01 06:39:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-01 06:39:56,280 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:56,280 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] [2021-05-01 06:39:56,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 06:39:56,280 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash -367033030, now seen corresponding path program 1 times [2021-05-01 06:39:56,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:56,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407977682] [2021-05-01 06:39:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:56,284 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:56,285 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:56,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:56,311 INFO L142 QuantifierPusher]: treesize reduction 2, result has 81.8 percent of original size [2021-05-01 06:39:56,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:39:56,316 INFO L142 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-05-01 06:39:56,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,319 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-05-01 06:39:56,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:56,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,340 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 06:39:56,340 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:56,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407977682] [2021-05-01 06:39:56,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [407977682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:56,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:56,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 06:39:56,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859874842] [2021-05-01 06:39:56,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 06:39:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:56,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 06:39:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:39:56,341 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 06:39:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:56,409 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2021-05-01 06:39:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 06:39:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 06:39:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:56,411 INFO L225 Difference]: With dead ends: 100 [2021-05-01 06:39:56,411 INFO L226 Difference]: Without dead ends: 65 [2021-05-01 06:39:56,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:39:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-01 06:39:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-05-01 06:39:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 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 06:39:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-05-01 06:39:56,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2021-05-01 06:39:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:56,420 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-05-01 06:39:56,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 06:39:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-05-01 06:39:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-01 06:39:56,420 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:56,420 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] [2021-05-01 06:39:56,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 06:39:56,421 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2021-05-01 06:39:56,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:56,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885449349] [2021-05-01 06:39:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:56,425 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:56,426 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:56,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:56,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:39:56,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:56,485 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:39:56,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:56,489 INFO L142 QuantifierPusher]: treesize reduction 14, result has 51.7 percent of original size [2021-05-01 06:39:56,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:39:56,498 INFO L142 QuantifierPusher]: treesize reduction 16, result has 59.0 percent of original size [2021-05-01 06:39:56,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 06:39:56,511 INFO L142 QuantifierPusher]: treesize reduction 16, result has 69.2 percent of original size [2021-05-01 06:39:56,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:39:56,532 INFO L142 QuantifierPusher]: treesize reduction 16, result has 67.3 percent of original size [2021-05-01 06:39:56,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:39:56,547 INFO L142 QuantifierPusher]: treesize reduction 16, result has 68.0 percent of original size [2021-05-01 06:39:56,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:39:56,563 INFO L142 QuantifierPusher]: treesize reduction 40, result has 48.1 percent of original size [2021-05-01 06:39:56,564 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:39:56,582 INFO L142 QuantifierPusher]: treesize reduction 30, result has 67.4 percent of original size [2021-05-01 06:39:56,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-05-01 06:39:56,613 INFO L142 QuantifierPusher]: treesize reduction 30, result has 67.0 percent of original size [2021-05-01 06:39:56,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-05-01 06:39:56,641 INFO L142 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-05-01 06:39:56,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:39:56,654 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:39:56,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:39:56,658 INFO L142 QuantifierPusher]: treesize reduction 41, result has 48.1 percent of original size [2021-05-01 06:39:56,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:39:56,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:56,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:56,702 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:56,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:56,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:56,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:56,760 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 06:39:56,760 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:56,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885449349] [2021-05-01 06:39:56,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885449349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:56,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:56,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-01 06:39:56,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640332265] [2021-05-01 06:39:56,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-01 06:39:56,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-01 06:39:56,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-01 06:39:56,761 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 06:39:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:57,501 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2021-05-01 06:39:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-01 06:39:57,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 30 [2021-05-01 06:39:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:57,503 INFO L225 Difference]: With dead ends: 138 [2021-05-01 06:39:57,503 INFO L226 Difference]: Without dead ends: 103 [2021-05-01 06:39:57,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-05-01 06:39:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-01 06:39:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2021-05-01 06:39:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 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 06:39:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-05-01 06:39:57,523 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2021-05-01 06:39:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:57,523 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-05-01 06:39:57,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 06:39:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-05-01 06:39:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-01 06:39:57,524 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:57,524 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] [2021-05-01 06:39:57,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-01 06:39:57,524 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2021-05-01 06:39:57,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:57,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519381464] [2021-05-01 06:39:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:57,529 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:57,530 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:57,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:57,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:57,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 06:39:57,575 INFO L142 QuantifierPusher]: treesize reduction 2, result has 90.0 percent of original size [2021-05-01 06:39:57,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:39:57,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:39:57,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,622 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 06:39:57,622 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:57,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519381464] [2021-05-01 06:39:57,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519381464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:57,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:57,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 06:39:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078540353] [2021-05-01 06:39:57,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 06:39:57,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 06:39:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:39:57,623 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 06:39:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:57,770 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2021-05-01 06:39:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 06:39:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 06:39:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:57,771 INFO L225 Difference]: With dead ends: 147 [2021-05-01 06:39:57,771 INFO L226 Difference]: Without dead ends: 107 [2021-05-01 06:39:57,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:39:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-01 06:39:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-05-01 06:39:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 63 states have internal predecessors, (74), 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 06:39:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-05-01 06:39:57,785 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 31 [2021-05-01 06:39:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:57,785 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-05-01 06:39:57,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 06:39:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-05-01 06:39:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 06:39:57,786 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:57,786 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] [2021-05-01 06:39:57,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-01 06:39:57,787 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2021-05-01 06:39:57,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:57,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399695679] [2021-05-01 06:39:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:57,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:57,792 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:57,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:57,821 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-05-01 06:39:57,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 06:39:57,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:39:57,838 INFO L142 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-05-01 06:39:57,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:39:57,846 INFO L142 QuantifierPusher]: treesize reduction 1, result has 96.2 percent of original size [2021-05-01 06:39:57,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:39:57,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-01 06:39:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:57,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:57,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:57,888 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 06:39:57,889 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:57,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399695679] [2021-05-01 06:39:57,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399695679] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:57,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:57,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 06:39:57,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100250730] [2021-05-01 06:39:57,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 06:39:57,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 06:39:57,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:39:57,890 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 06:39:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:58,031 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-01 06:39:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 06:39:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 06:39:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:58,032 INFO L225 Difference]: With dead ends: 116 [2021-05-01 06:39:58,032 INFO L226 Difference]: Without dead ends: 87 [2021-05-01 06:39:58,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-01 06:39:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-01 06:39:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2021-05-01 06:39:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 59 states have internal predecessors, (69), 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 06:39:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-01 06:39:58,044 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 33 [2021-05-01 06:39:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:58,044 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-01 06:39:58,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 06:39:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-01 06:39:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 06:39:58,045 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:58,045 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:58,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-01 06:39:58,045 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2021-05-01 06:39:58,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:58,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972561917] [2021-05-01 06:39:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:58,049 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:58,050 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:58,120 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:39:58,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,128 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:39:58,129 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:58,132 INFO L142 QuantifierPusher]: treesize reduction 55, result has 29.5 percent of original size [2021-05-01 06:39:58,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 06:39:58,145 INFO L142 QuantifierPusher]: treesize reduction 65, result has 33.7 percent of original size [2021-05-01 06:39:58,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:39:58,179 INFO L142 QuantifierPusher]: treesize reduction 65, result has 39.3 percent of original size [2021-05-01 06:39:58,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-05-01 06:39:58,203 INFO L142 QuantifierPusher]: treesize reduction 65, result has 38.1 percent of original size [2021-05-01 06:39:58,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:39:58,229 INFO L142 QuantifierPusher]: treesize reduction 15, result has 75.0 percent of original size [2021-05-01 06:39:58,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:39:58,247 INFO L142 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-05-01 06:39:58,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:39:58,261 INFO L142 QuantifierPusher]: treesize reduction 9, result has 78.6 percent of original size [2021-05-01 06:39:58,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:39:58,273 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:39:58,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:39:58,284 INFO L142 QuantifierPusher]: treesize reduction 17, result has 67.9 percent of original size [2021-05-01 06:39:58,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:39:58,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,351 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 06:39:58,351 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:58,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972561917] [2021-05-01 06:39:58,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972561917] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:58,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:58,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-01 06:39:58,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643036292] [2021-05-01 06:39:58,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-01 06:39:58,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-01 06:39:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-01 06:39:58,352 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 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 06:39:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:58,746 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2021-05-01 06:39:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-01 06:39:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 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 33 [2021-05-01 06:39:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:58,747 INFO L225 Difference]: With dead ends: 103 [2021-05-01 06:39:58,747 INFO L226 Difference]: Without dead ends: 101 [2021-05-01 06:39:58,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-05-01 06:39:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-01 06:39:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2021-05-01 06:39:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 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 06:39:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2021-05-01 06:39:58,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 33 [2021-05-01 06:39:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:58,760 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2021-05-01 06:39:58,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 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 06:39:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2021-05-01 06:39:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-01 06:39:58,761 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:58,761 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-05-01 06:39:58,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-01 06:39:58,761 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2021-05-01 06:39:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:58,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652038844] [2021-05-01 06:39:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:58,766 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:58,767 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:58,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:58,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:58,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 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 10 [2021-05-01 06:39:58,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,827 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:39:58,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:58,830 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-05-01 06:39:58,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:58,836 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-05-01 06:39:58,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:39:58,842 INFO L142 QuantifierPusher]: treesize reduction 30, result has 47.4 percent of original size [2021-05-01 06:39:58,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:39:58,862 INFO L142 QuantifierPusher]: treesize reduction 22, result has 66.7 percent of original size [2021-05-01 06:39:58,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-05-01 06:39:58,876 INFO L142 QuantifierPusher]: treesize reduction 22, result has 71.1 percent of original size [2021-05-01 06:39:58,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-01 06:39:58,896 INFO L142 QuantifierPusher]: treesize reduction 22, result has 70.3 percent of original size [2021-05-01 06:39:58,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:39:58,913 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:39:58,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:39:58,923 INFO L142 QuantifierPusher]: treesize reduction 32, result has 52.9 percent of original size [2021-05-01 06:39:58,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:39:58,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:58,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:39:58,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:58,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:59,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,006 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 06:39:59,007 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:59,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652038844] [2021-05-01 06:39:59,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [652038844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:59,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:59,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-01 06:39:59,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592212808] [2021-05-01 06:39:59,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-01 06:39:59,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:59,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-01 06:39:59,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-01 06:39:59,008 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 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 06:39:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:59,701 INFO L93 Difference]: Finished difference Result 219 states and 274 transitions. [2021-05-01 06:39:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-01 06:39:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 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 38 [2021-05-01 06:39:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:59,703 INFO L225 Difference]: With dead ends: 219 [2021-05-01 06:39:59,703 INFO L226 Difference]: Without dead ends: 179 [2021-05-01 06:39:59,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2021-05-01 06:39:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-01 06:39:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 87. [2021-05-01 06:39:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 80 states have internal predecessors, (100), 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 06:39:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2021-05-01 06:39:59,718 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 38 [2021-05-01 06:39:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:59,718 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-05-01 06:39:59,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 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 06:39:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2021-05-01 06:39:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-01 06:39:59,719 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:59,719 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:59,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-01 06:39:59,719 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1626849634, now seen corresponding path program 2 times [2021-05-01 06:39:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:59,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888847684] [2021-05-01 06:39:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:59,724 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:59,725 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:39:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:59,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:39:59,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:59,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:59,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:39:59,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:39:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:39:59,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:39:59,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:39:59,781 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 06:39:59,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:39:59,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888847684] [2021-05-01 06:39:59,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888847684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:39:59,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:39:59,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:39:59,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009584024] [2021-05-01 06:39:59,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:39:59,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:39:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:39:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:39:59,782 INFO L87 Difference]: Start difference. First operand 87 states and 107 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 06:39:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:39:59,942 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2021-05-01 06:39:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-01 06:39:59,943 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 38 [2021-05-01 06:39:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:39:59,944 INFO L225 Difference]: With dead ends: 174 [2021-05-01 06:39:59,944 INFO L226 Difference]: Without dead ends: 122 [2021-05-01 06:39:59,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-01 06:39:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-01 06:39:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-05-01 06:39:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 87 states have internal predecessors, (104), 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 06:39:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-05-01 06:39:59,958 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 38 [2021-05-01 06:39:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:39:59,959 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-05-01 06:39:59,959 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 06:39:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-05-01 06:39:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-01 06:39:59,959 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:39:59,960 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:39:59,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-01 06:39:59,960 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:39:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:39:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 3 times [2021-05-01 06:39:59,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:39:59,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711437492] [2021-05-01 06:39:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:39:59,965 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:39:59,966 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:00,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:00,037 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:40:00,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:00,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:00,045 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:00,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:00,048 INFO L142 QuantifierPusher]: treesize reduction 18, result has 50.0 percent of original size [2021-05-01 06:40:00,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:00,056 INFO L142 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-05-01 06:40:00,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:00,070 INFO L142 QuantifierPusher]: treesize reduction 20, result has 60.8 percent of original size [2021-05-01 06:40:00,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:00,087 INFO L142 QuantifierPusher]: treesize reduction 20, result has 58.3 percent of original size [2021-05-01 06:40:00,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:00,102 INFO L142 QuantifierPusher]: treesize reduction 20, result has 59.2 percent of original size [2021-05-01 06:40:00,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:00,119 INFO L142 QuantifierPusher]: treesize reduction 44, result has 47.6 percent of original size [2021-05-01 06:40:00,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:00,139 INFO L142 QuantifierPusher]: treesize reduction 58, result has 45.3 percent of original size [2021-05-01 06:40:00,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-05-01 06:40:00,166 INFO L142 QuantifierPusher]: treesize reduction 58, result has 43.7 percent of original size [2021-05-01 06:40:00,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:00,190 INFO L142 QuantifierPusher]: treesize reduction 15, result has 72.7 percent of original size [2021-05-01 06:40:00,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:00,211 INFO L142 QuantifierPusher]: treesize reduction 15, result has 75.0 percent of original size [2021-05-01 06:40:00,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:00,232 INFO L142 QuantifierPusher]: treesize reduction 14, result has 70.8 percent of original size [2021-05-01 06:40:00,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:00,248 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:00,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:00,262 INFO L142 QuantifierPusher]: treesize reduction 42, result has 47.5 percent of original size [2021-05-01 06:40:00,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:00,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:00,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:00,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:00,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:00,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,347 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 06:40:00,347 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711437492] [2021-05-01 06:40:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [711437492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:00,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:00,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-01 06:40:00,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113058611] [2021-05-01 06:40:00,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-01 06:40:00,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-01 06:40:00,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-01 06:40:00,349 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 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 06:40:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:00,871 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-05-01 06:40:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-01 06:40:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 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 38 [2021-05-01 06:40:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:00,872 INFO L225 Difference]: With dead ends: 129 [2021-05-01 06:40:00,872 INFO L226 Difference]: Without dead ends: 127 [2021-05-01 06:40:00,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 476.9ms TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-05-01 06:40:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-01 06:40:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-05-01 06:40:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 87 states have internal predecessors, (104), 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 06:40:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-05-01 06:40:00,889 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 38 [2021-05-01 06:40:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:00,889 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-05-01 06:40:00,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 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 06:40:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-05-01 06:40:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-01 06:40:00,890 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:00,890 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-01 06:40:00,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-01 06:40:00,890 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2021-05-01 06:40:00,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:00,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465227687] [2021-05-01 06:40:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:00,896 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:00,898 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:00,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:00,965 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:00,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:00,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:00,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:00,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:00,981 INFO L142 QuantifierPusher]: treesize reduction 15, result has 25.0 percent of original size [2021-05-01 06:40:00,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:00,985 INFO L142 QuantifierPusher]: treesize reduction 15, result has 25.0 percent of original size [2021-05-01 06:40:00,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:00,989 INFO L142 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-05-01 06:40:00,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:00,999 INFO L142 QuantifierPusher]: treesize reduction 14, result has 54.8 percent of original size [2021-05-01 06:40:00,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:01,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:01,015 INFO L142 QuantifierPusher]: treesize reduction 14, result has 65.0 percent of original size [2021-05-01 06:40:01,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:01,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:01,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:01,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:01,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:01,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:01,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:01,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:01,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-01 06:40:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:01,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:01,101 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 06:40:01,102 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:01,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465227687] [2021-05-01 06:40:01,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [465227687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:01,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:01,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-01 06:40:01,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212424178] [2021-05-01 06:40:01,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-01 06:40:01,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:01,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-01 06:40:01,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-01 06:40:01,103 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 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 06:40:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:01,548 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-05-01 06:40:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-01 06:40:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 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 41 [2021-05-01 06:40:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:01,549 INFO L225 Difference]: With dead ends: 160 [2021-05-01 06:40:01,549 INFO L226 Difference]: Without dead ends: 158 [2021-05-01 06:40:01,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-01 06:40:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-01 06:40:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2021-05-01 06:40:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 100 states have (on average 1.2) internal successors, (120), 102 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-05-01 06:40:01,564 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 41 [2021-05-01 06:40:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:01,565 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-05-01 06:40:01,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 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 06:40:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-05-01 06:40:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 06:40:01,566 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:01,566 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:01,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-01 06:40:01,566 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 4 times [2021-05-01 06:40:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:01,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911007986] [2021-05-01 06:40:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:01,570 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:01,571 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:01,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:01,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:01,610 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:40:01,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:01,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:01,619 INFO L142 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size [2021-05-01 06:40:01,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:01,622 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-05-01 06:40:01,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:01,627 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-05-01 06:40:01,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:01,633 INFO L142 QuantifierPusher]: treesize reduction 13, result has 53.6 percent of original size [2021-05-01 06:40:01,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:01,642 INFO L142 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-05-01 06:40:01,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:01,655 INFO L142 QuantifierPusher]: treesize reduction 15, result has 65.1 percent of original size [2021-05-01 06:40:01,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:01,673 INFO L142 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size [2021-05-01 06:40:01,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:01,690 INFO L142 QuantifierPusher]: treesize reduction 15, result has 63.4 percent of original size [2021-05-01 06:40:01,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:01,716 INFO L142 QuantifierPusher]: treesize reduction 39, result has 48.7 percent of original size [2021-05-01 06:40:01,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:01,746 INFO L142 QuantifierPusher]: treesize reduction 29, result has 68.1 percent of original size [2021-05-01 06:40:01,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-05-01 06:40:01,797 INFO L142 QuantifierPusher]: treesize reduction 29, result has 67.8 percent of original size [2021-05-01 06:40:01,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-05-01 06:40:01,835 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:01,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:01,855 INFO L142 QuantifierPusher]: treesize reduction 41, result has 48.1 percent of original size [2021-05-01 06:40:01,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:01,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:01,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:01,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:01,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:01,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:01,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:01,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:01,974 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 06:40:01,974 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:01,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911007986] [2021-05-01 06:40:01,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911007986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:01,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:01,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-01 06:40:01,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890406201] [2021-05-01 06:40:01,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-01 06:40:01,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:01,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-01 06:40:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-01 06:40:01,976 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 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 06:40:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:02,873 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2021-05-01 06:40:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-01 06:40:02,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 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 06:40:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:02,875 INFO L225 Difference]: With dead ends: 237 [2021-05-01 06:40:02,875 INFO L226 Difference]: Without dead ends: 185 [2021-05-01 06:40:02,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 778.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1782, Unknown=0, NotChecked=0, Total=2162 [2021-05-01 06:40:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-01 06:40:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2021-05-01 06:40:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2021-05-01 06:40:02,893 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 43 [2021-05-01 06:40:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:02,893 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2021-05-01 06:40:02,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 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 06:40:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2021-05-01 06:40:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-01 06:40:02,894 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:02,894 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:02,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-01 06:40:02,894 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:02,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:02,894 INFO L82 PathProgramCache]: Analyzing trace with hash -866950133, now seen corresponding path program 1 times [2021-05-01 06:40:02,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:02,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632670207] [2021-05-01 06:40:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:02,898 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:02,899 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:02,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:02,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:02,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:02,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:02,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:02,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:02,948 INFO L142 QuantifierPusher]: treesize reduction 2, result has 95.8 percent of original size [2021-05-01 06:40:02,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-05-01 06:40:02,966 INFO L142 QuantifierPusher]: treesize reduction 13, result has 64.9 percent of original size [2021-05-01 06:40:02,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:02,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:02,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:02,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:02,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,019 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 06:40:03,019 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:03,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632670207] [2021-05-01 06:40:03,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [632670207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:03,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:03,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-01 06:40:03,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996823060] [2021-05-01 06:40:03,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-01 06:40:03,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:03,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-01 06:40:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-01 06:40:03,020 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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 06:40:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:03,233 INFO L93 Difference]: Finished difference Result 279 states and 333 transitions. [2021-05-01 06:40:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-01 06:40:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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 44 [2021-05-01 06:40:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:03,236 INFO L225 Difference]: With dead ends: 279 [2021-05-01 06:40:03,236 INFO L226 Difference]: Without dead ends: 216 [2021-05-01 06:40:03,238 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-01 06:40:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-01 06:40:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 147. [2021-05-01 06:40:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 138 states have internal predecessors, (159), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-05-01 06:40:03,265 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 44 [2021-05-01 06:40:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:03,266 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-05-01 06:40:03,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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 06:40:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-05-01 06:40:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-01 06:40:03,266 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:03,266 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-05-01 06:40:03,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-01 06:40:03,266 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2021-05-01 06:40:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:03,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663745297] [2021-05-01 06:40:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:03,271 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:03,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:03,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:03,337 INFO L142 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-05-01 06:40:03,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:03,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-05-01 06:40:03,346 INFO L142 QuantifierPusher]: treesize reduction 11, result has 21.4 percent of original size [2021-05-01 06:40:03,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:03,348 INFO L142 QuantifierPusher]: treesize reduction 28, result has 15.2 percent of original size [2021-05-01 06:40:03,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:03,352 INFO L142 QuantifierPusher]: treesize reduction 28, result has 15.2 percent of original size [2021-05-01 06:40:03,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:03,358 INFO L142 QuantifierPusher]: treesize reduction 28, result has 44.0 percent of original size [2021-05-01 06:40:03,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:03,367 INFO L142 QuantifierPusher]: treesize reduction 27, result has 41.3 percent of original size [2021-05-01 06:40:03,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:03,378 INFO L142 QuantifierPusher]: treesize reduction 27, result has 42.6 percent of original size [2021-05-01 06:40:03,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:03,387 INFO L142 QuantifierPusher]: treesize reduction 5, result has 83.3 percent of original size [2021-05-01 06:40:03,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:03,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:03,404 INFO L142 QuantifierPusher]: treesize reduction 2, result has 91.3 percent of original size [2021-05-01 06:40:03,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:03,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:03,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:03,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:03,445 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:03,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-01 06:40:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,489 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 06:40:03,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:03,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663745297] [2021-05-01 06:40:03,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [663745297] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:03,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:03,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-01 06:40:03,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140819404] [2021-05-01 06:40:03,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-01 06:40:03,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-01 06:40:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-01 06:40:03,491 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 06:40:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:04,027 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2021-05-01 06:40:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-01 06:40:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 46 [2021-05-01 06:40:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:04,029 INFO L225 Difference]: With dead ends: 196 [2021-05-01 06:40:04,029 INFO L226 Difference]: Without dead ends: 194 [2021-05-01 06:40:04,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-01 06:40:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-01 06:40:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2021-05-01 06:40:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 139 states have internal predecessors, (161), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2021-05-01 06:40:04,056 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 46 [2021-05-01 06:40:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:04,056 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2021-05-01 06:40:04,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 06:40:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2021-05-01 06:40:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-01 06:40:04,058 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:04,058 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:04,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-01 06:40:04,058 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 2 times [2021-05-01 06:40:04,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:04,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354519906] [2021-05-01 06:40:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:04,062 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:04,063 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,120 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,125 INFO L142 QuantifierPusher]: treesize reduction 10, result has 77.3 percent of original size [2021-05-01 06:40:04,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:04,136 INFO L142 QuantifierPusher]: treesize reduction 10, result has 72.2 percent of original size [2021-05-01 06:40:04,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:04,139 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.7 percent of original size [2021-05-01 06:40:04,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:04,149 INFO L142 QuantifierPusher]: treesize reduction 10, result has 66.7 percent of original size [2021-05-01 06:40:04,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:04,153 INFO L142 QuantifierPusher]: treesize reduction 9, result has 57.1 percent of original size [2021-05-01 06:40:04,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:04,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,164 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:04,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,168 INFO L142 QuantifierPusher]: treesize reduction 43, result has 51.1 percent of original size [2021-05-01 06:40:04,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:04,187 INFO L142 QuantifierPusher]: treesize reduction 35, result has 64.6 percent of original size [2021-05-01 06:40:04,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-05-01 06:40:04,213 INFO L142 QuantifierPusher]: treesize reduction 35, result has 67.9 percent of original size [2021-05-01 06:40:04,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-05-01 06:40:04,246 INFO L142 QuantifierPusher]: treesize reduction 35, result has 67.3 percent of original size [2021-05-01 06:40:04,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-05-01 06:40:04,278 INFO L142 QuantifierPusher]: treesize reduction 13, result has 77.6 percent of original size [2021-05-01 06:40:04,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:04,297 INFO L142 QuantifierPusher]: treesize reduction 15, result has 74.6 percent of original size [2021-05-01 06:40:04,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-05-01 06:40:04,318 INFO L142 QuantifierPusher]: treesize reduction 14, result has 78.5 percent of original size [2021-05-01 06:40:04,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-05-01 06:40:04,339 INFO L142 QuantifierPusher]: treesize reduction 10, result has 76.7 percent of original size [2021-05-01 06:40:04,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:04,359 INFO L142 QuantifierPusher]: treesize reduction 10, result has 76.7 percent of original size [2021-05-01 06:40:04,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:04,378 INFO L142 QuantifierPusher]: treesize reduction 10, result has 76.7 percent of original size [2021-05-01 06:40:04,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:04,397 INFO L142 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-05-01 06:40:04,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:04,414 INFO L142 QuantifierPusher]: treesize reduction 9, result has 78.6 percent of original size [2021-05-01 06:40:04,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:04,429 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:04,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:04,443 INFO L142 QuantifierPusher]: treesize reduction 19, result has 65.5 percent of original size [2021-05-01 06:40:04,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:04,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:04,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:04,508 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,545 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,546 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 06:40:04,546 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354519906] [2021-05-01 06:40:04,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354519906] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:04,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:04,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-01 06:40:04,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121592534] [2021-05-01 06:40:04,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-01 06:40:04,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:04,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-01 06:40:04,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-01 06:40:04,547 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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 06:40:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:05,408 INFO L93 Difference]: Finished difference Result 283 states and 333 transitions. [2021-05-01 06:40:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-01 06:40:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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 06:40:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:05,411 INFO L225 Difference]: With dead ends: 283 [2021-05-01 06:40:05,411 INFO L226 Difference]: Without dead ends: 226 [2021-05-01 06:40:05,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 735.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-05-01 06:40:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-01 06:40:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 159. [2021-05-01 06:40:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 150 states have internal predecessors, (175), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-01 06:40:05,440 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 46 [2021-05-01 06:40:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:05,440 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-01 06:40:05,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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 06:40:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-01 06:40:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-01 06:40:05,441 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:05,441 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:05,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-01 06:40:05,441 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 2 times [2021-05-01 06:40:05,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:05,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666010646] [2021-05-01 06:40:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:05,448 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:05,449 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,521 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:05,524 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,525 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:05,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,533 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:05,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:05,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:05,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,542 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:05,549 INFO L142 QuantifierPusher]: treesize reduction 37, result has 51.3 percent of original size [2021-05-01 06:40:05,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:05,568 INFO L142 QuantifierPusher]: treesize reduction 28, result has 67.8 percent of original size [2021-05-01 06:40:05,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-05-01 06:40:05,593 INFO L142 QuantifierPusher]: treesize reduction 27, result has 71.6 percent of original size [2021-05-01 06:40:05,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-05-01 06:40:05,626 INFO L142 QuantifierPusher]: treesize reduction 27, result has 71.3 percent of original size [2021-05-01 06:40:05,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-05-01 06:40:05,655 INFO L142 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-05-01 06:40:05,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:05,674 INFO L142 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-05-01 06:40:05,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:05,695 INFO L142 QuantifierPusher]: treesize reduction 9, result has 78.6 percent of original size [2021-05-01 06:40:05,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:05,711 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:05,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:05,725 INFO L142 QuantifierPusher]: treesize reduction 27, result has 57.1 percent of original size [2021-05-01 06:40:05,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:05,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:05,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:05,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,829 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 06:40:05,830 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:05,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666010646] [2021-05-01 06:40:05,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [666010646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:05,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:05,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-01 06:40:05,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184749644] [2021-05-01 06:40:05,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-01 06:40:05,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-01 06:40:05,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-01 06:40:05,831 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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 06:40:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:06,694 INFO L93 Difference]: Finished difference Result 258 states and 304 transitions. [2021-05-01 06:40:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-01 06:40:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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 06:40:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:06,696 INFO L225 Difference]: With dead ends: 258 [2021-05-01 06:40:06,696 INFO L226 Difference]: Without dead ends: 256 [2021-05-01 06:40:06,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-05-01 06:40:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-01 06:40:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 184. [2021-05-01 06:40:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 173 states have (on average 1.2080924855491328) internal successors, (209), 175 states have internal predecessors, (209), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-05-01 06:40:06,730 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 46 [2021-05-01 06:40:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:06,730 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-05-01 06:40:06,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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 06:40:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-05-01 06:40:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-01 06:40:06,731 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:06,731 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:06,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-01 06:40:06,731 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:06,731 INFO L82 PathProgramCache]: Analyzing trace with hash -564916451, now seen corresponding path program 5 times [2021-05-01 06:40:06,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:06,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896609563] [2021-05-01 06:40:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:06,736 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:06,737 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:06,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 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 1 [2021-05-01 06:40:06,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 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 7 [2021-05-01 06:40:06,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:06,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:06,798 INFO L142 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size [2021-05-01 06:40:06,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:06,801 INFO L142 QuantifierPusher]: treesize reduction 14, result has 46.2 percent of original size [2021-05-01 06:40:06,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:06,807 INFO L142 QuantifierPusher]: treesize reduction 14, result has 56.3 percent of original size [2021-05-01 06:40:06,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:06,810 INFO L142 QuantifierPusher]: treesize reduction 14, result has 68.9 percent of original size [2021-05-01 06:40:06,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:06,826 INFO L142 QuantifierPusher]: treesize reduction 14, result has 66.7 percent of original size [2021-05-01 06:40:06,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:06,840 INFO L142 QuantifierPusher]: treesize reduction 15, result has 65.9 percent of original size [2021-05-01 06:40:06,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:06,855 INFO L142 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-05-01 06:40:06,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-01 06:40:06,875 INFO L142 QuantifierPusher]: treesize reduction 27, result has 75.2 percent of original size [2021-05-01 06:40:06,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-05-01 06:40:06,911 INFO L142 QuantifierPusher]: treesize reduction 27, result has 74.8 percent of original size [2021-05-01 06:40:06,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-05-01 06:40:06,944 INFO L142 QuantifierPusher]: treesize reduction 19, result has 67.8 percent of original size [2021-05-01 06:40:06,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:06,962 INFO L142 QuantifierPusher]: treesize reduction 15, result has 75.0 percent of original size [2021-05-01 06:40:06,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:06,981 INFO L142 QuantifierPusher]: treesize reduction 14, result has 80.3 percent of original size [2021-05-01 06:40:06,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-05-01 06:40:07,004 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:07,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:07,030 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:07,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:07,050 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:40:07,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:07,067 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:07,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:07,081 INFO L142 QuantifierPusher]: treesize reduction 17, result has 69.1 percent of original size [2021-05-01 06:40:07,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:07,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:07,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,114 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:07,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,129 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:07,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:07,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:07,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:07,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:07,169 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 06:40:07,169 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:07,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896609563] [2021-05-01 06:40:07,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [896609563] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:07,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-01 06:40:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845983031] [2021-05-01 06:40:07,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-01 06:40:07,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-01 06:40:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-01 06:40:07,170 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 06:40:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:07,938 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2021-05-01 06:40:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-01 06:40:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 06:40:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:07,940 INFO L225 Difference]: With dead ends: 251 [2021-05-01 06:40:07,940 INFO L226 Difference]: Without dead ends: 249 [2021-05-01 06:40:07,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-05-01 06:40:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-01 06:40:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 206. [2021-05-01 06:40:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 193 states have (on average 1.2020725388601037) internal successors, (232), 196 states have internal predecessors, (232), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 06:40:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 245 transitions. [2021-05-01 06:40:07,977 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 245 transitions. Word has length 46 [2021-05-01 06:40:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:07,977 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 245 transitions. [2021-05-01 06:40:07,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 06:40:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 245 transitions. [2021-05-01 06:40:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-01 06:40:07,977 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:07,977 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:07,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-01 06:40:07,978 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:07,978 INFO L82 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2021-05-01 06:40:07,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:07,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261738427] [2021-05-01 06:40:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:07,981 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:07,982 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:08,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:08,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:08,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:08,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:08,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:40:08,026 INFO L142 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-05-01 06:40:08,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:08,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:08,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:08,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:08,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-01 06:40:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:08,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 06:40:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:08,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,082 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 06:40:08,082 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:08,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261738427] [2021-05-01 06:40:08,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261738427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:08,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:08,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-01 06:40:08,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092368032] [2021-05-01 06:40:08,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-01 06:40:08,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-01 06:40:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-01 06:40:08,083 INFO L87 Difference]: Start difference. First operand 206 states and 245 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 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 06:40:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:08,348 INFO L93 Difference]: Finished difference Result 303 states and 362 transitions. [2021-05-01 06:40:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-01 06:40:08,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 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 49 [2021-05-01 06:40:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:08,349 INFO L225 Difference]: With dead ends: 303 [2021-05-01 06:40:08,349 INFO L226 Difference]: Without dead ends: 270 [2021-05-01 06:40:08,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-01 06:40:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-01 06:40:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 197. [2021-05-01 06:40:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 185 states have (on average 1.1837837837837837) internal successors, (219), 188 states have internal predecessors, (219), 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 06:40:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 231 transitions. [2021-05-01 06:40:08,386 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 231 transitions. Word has length 49 [2021-05-01 06:40:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:08,386 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 231 transitions. [2021-05-01 06:40:08,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 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 06:40:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 231 transitions. [2021-05-01 06:40:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-01 06:40:08,386 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:08,386 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:08,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-01 06:40:08,387 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2021-05-01 06:40:08,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:08,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081726109] [2021-05-01 06:40:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:08,390 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:08,391 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:08,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,424 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:08,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:08,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:08,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:08,437 INFO L142 QuantifierPusher]: treesize reduction 15, result has 25.0 percent of original size [2021-05-01 06:40:08,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:08,440 INFO L142 QuantifierPusher]: treesize reduction 14, result has 44.0 percent of original size [2021-05-01 06:40:08,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:40:08,446 INFO L142 QuantifierPusher]: treesize reduction 14, result has 64.1 percent of original size [2021-05-01 06:40:08,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:08,457 INFO L142 QuantifierPusher]: treesize reduction 14, result has 61.1 percent of original size [2021-05-01 06:40:08,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:08,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:08,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:08,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:08,494 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:08,502 INFO L142 QuantifierPusher]: treesize reduction 14, result has 65.0 percent of original size [2021-05-01 06:40:08,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:08,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:08,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:08,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:08,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:08,560 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,560 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:08,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 06:40:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:08,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:08,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:08,608 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 06:40:08,608 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:08,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081726109] [2021-05-01 06:40:08,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081726109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:08,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:08,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-01 06:40:08,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43393692] [2021-05-01 06:40:08,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-01 06:40:08,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:08,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-01 06:40:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-05-01 06:40:08,609 INFO L87 Difference]: Start difference. First operand 197 states and 231 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 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 06:40:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:09,306 INFO L93 Difference]: Finished difference Result 234 states and 276 transitions. [2021-05-01 06:40:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-01 06:40:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 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 49 [2021-05-01 06:40:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:09,307 INFO L225 Difference]: With dead ends: 234 [2021-05-01 06:40:09,307 INFO L226 Difference]: Without dead ends: 232 [2021-05-01 06:40:09,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-05-01 06:40:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-01 06:40:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 211. [2021-05-01 06:40:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 200 states have internal predecessors, (229), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 06:40:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 247 transitions. [2021-05-01 06:40:09,347 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 247 transitions. Word has length 49 [2021-05-01 06:40:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:09,347 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 247 transitions. [2021-05-01 06:40:09,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 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 06:40:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 247 transitions. [2021-05-01 06:40:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-01 06:40:09,348 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:09,348 INFO L519 BasicCegarLoop]: trace histogram [4, 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 06:40:09,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-01 06:40:09,348 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2021-05-01 06:40:09,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:09,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743728470] [2021-05-01 06:40:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:09,352 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:09,353 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:09,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:09,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:09,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:09,406 INFO L142 QuantifierPusher]: treesize reduction 10, result has 77.3 percent of original size [2021-05-01 06:40:09,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:09,418 INFO L142 QuantifierPusher]: treesize reduction 10, result has 72.2 percent of original size [2021-05-01 06:40:09,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:09,422 INFO L142 QuantifierPusher]: treesize reduction 10, result has 64.3 percent of original size [2021-05-01 06:40:09,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:09,432 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:40:09,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:09,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:09,437 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:09,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:09,441 INFO L142 QuantifierPusher]: treesize reduction 43, result has 47.6 percent of original size [2021-05-01 06:40:09,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:09,455 INFO L142 QuantifierPusher]: treesize reduction 35, result has 62.8 percent of original size [2021-05-01 06:40:09,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-05-01 06:40:09,483 INFO L142 QuantifierPusher]: treesize reduction 36, result has 65.7 percent of original size [2021-05-01 06:40:09,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-05-01 06:40:09,518 INFO L142 QuantifierPusher]: treesize reduction 36, result has 65.0 percent of original size [2021-05-01 06:40:09,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-05-01 06:40:09,551 INFO L142 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-05-01 06:40:09,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:09,569 INFO L142 QuantifierPusher]: treesize reduction 34, result has 45.2 percent of original size [2021-05-01 06:40:09,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:09,589 INFO L142 QuantifierPusher]: treesize reduction 35, result has 59.8 percent of original size [2021-05-01 06:40:09,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:09,613 INFO L142 QuantifierPusher]: treesize reduction 35, result has 51.4 percent of original size [2021-05-01 06:40:09,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:09,655 INFO L142 QuantifierPusher]: treesize reduction 15, result has 81.9 percent of original size [2021-05-01 06:40:09,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-05-01 06:40:09,681 INFO L142 QuantifierPusher]: treesize reduction 25, result has 74.7 percent of original size [2021-05-01 06:40:09,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-05-01 06:40:09,697 INFO L142 QuantifierPusher]: treesize reduction 25, result has 74.0 percent of original size [2021-05-01 06:40:09,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-05-01 06:40:09,714 INFO L142 QuantifierPusher]: treesize reduction 25, result has 69.1 percent of original size [2021-05-01 06:40:09,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:40:09,742 INFO L142 QuantifierPusher]: treesize reduction 47, result has 56.9 percent of original size [2021-05-01 06:40:09,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-05-01 06:40:09,775 INFO L142 QuantifierPusher]: treesize reduction 35, result has 71.1 percent of original size [2021-05-01 06:40:09,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-05-01 06:40:09,821 INFO L142 QuantifierPusher]: treesize reduction 37, result has 69.2 percent of original size [2021-05-01 06:40:09,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-05-01 06:40:09,861 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:09,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:09,879 INFO L142 QuantifierPusher]: treesize reduction 11, result has 66.7 percent of original size [2021-05-01 06:40:09,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:09,909 INFO L142 QuantifierPusher]: treesize reduction 9, result has 72.7 percent of original size [2021-05-01 06:40:09,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:09,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:09,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:09,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:09,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:09,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:09,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:10,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:10,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:10,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-05-01 06:40:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:10,004 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:10,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:10,005 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 06:40:10,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:10,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743728470] [2021-05-01 06:40:10,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [743728470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:10,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:10,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-01 06:40:10,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976646429] [2021-05-01 06:40:10,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-01 06:40:10,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-01 06:40:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-01 06:40:10,006 INFO L87 Difference]: Start difference. First operand 211 states and 247 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 06:40:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:11,219 INFO L93 Difference]: Finished difference Result 269 states and 311 transitions. [2021-05-01 06:40:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-01 06:40:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 51 [2021-05-01 06:40:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:11,231 INFO L225 Difference]: With dead ends: 269 [2021-05-01 06:40:11,231 INFO L226 Difference]: Without dead ends: 237 [2021-05-01 06:40:11,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1139.3ms TimeCoverageRelationStatistics Valid=293, Invalid=1963, Unknown=0, NotChecked=0, Total=2256 [2021-05-01 06:40:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-01 06:40:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-05-01 06:40:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 208 states have (on average 1.1634615384615385) internal successors, (242), 213 states have internal predecessors, (242), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 06:40:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 260 transitions. [2021-05-01 06:40:11,277 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 260 transitions. Word has length 51 [2021-05-01 06:40:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:11,277 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 260 transitions. [2021-05-01 06:40:11,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 06:40:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 260 transitions. [2021-05-01 06:40:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-01 06:40:11,282 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:11,282 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:11,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-01 06:40:11,282 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash 455716478, now seen corresponding path program 1 times [2021-05-01 06:40:11,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:11,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428902317] [2021-05-01 06:40:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:11,287 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:11,288 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:11,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:11,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:11,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:11,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:11,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:11,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:11,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:11,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:11,334 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 06:40:11,334 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:11,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428902317] [2021-05-01 06:40:11,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [428902317] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:11,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:11,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 06:40:11,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552837624] [2021-05-01 06:40:11,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 06:40:11,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:11,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 06:40:11,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:40:11,335 INFO L87 Difference]: Start difference. First operand 224 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 06:40:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:11,480 INFO L93 Difference]: Finished difference Result 310 states and 365 transitions. [2021-05-01 06:40:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 06:40:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 51 [2021-05-01 06:40:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:11,481 INFO L225 Difference]: With dead ends: 310 [2021-05-01 06:40:11,481 INFO L226 Difference]: Without dead ends: 254 [2021-05-01 06:40:11,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:40:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-01 06:40:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 212. [2021-05-01 06:40:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 196 states have (on average 1.1479591836734695) internal successors, (225), 201 states have internal predecessors, (225), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 06:40:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 243 transitions. [2021-05-01 06:40:11,527 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 243 transitions. Word has length 51 [2021-05-01 06:40:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:11,527 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 243 transitions. [2021-05-01 06:40:11,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 06:40:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 243 transitions. [2021-05-01 06:40:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-01 06:40:11,528 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:11,528 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:11,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-01 06:40:11,528 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1181899854, now seen corresponding path program 1 times [2021-05-01 06:40:11,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:11,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832938680] [2021-05-01 06:40:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:11,532 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:11,534 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:11,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:11,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:11,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:11,613 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.4 percent of original size [2021-05-01 06:40:11,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:40:11,626 INFO L142 QuantifierPusher]: treesize reduction 10, result has 76.7 percent of original size [2021-05-01 06:40:11,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:11,630 INFO L142 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-05-01 06:40:11,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:11,644 INFO L142 QuantifierPusher]: treesize reduction 14, result has 73.6 percent of original size [2021-05-01 06:40:11,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:11,649 INFO L142 QuantifierPusher]: treesize reduction 18, result has 59.1 percent of original size [2021-05-01 06:40:11,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:11,659 INFO L142 QuantifierPusher]: treesize reduction 18, result has 50.0 percent of original size [2021-05-01 06:40:11,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:11,667 INFO L142 QuantifierPusher]: treesize reduction 20, result has 51.2 percent of original size [2021-05-01 06:40:11,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:11,670 INFO L142 QuantifierPusher]: treesize reduction 18, result has 60.9 percent of original size [2021-05-01 06:40:11,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:11,674 INFO L142 QuantifierPusher]: treesize reduction 18, result has 58.1 percent of original size [2021-05-01 06:40:11,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:11,677 INFO L142 QuantifierPusher]: treesize reduction 20, result has 51.2 percent of original size [2021-05-01 06:40:11,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:11,681 INFO L142 QuantifierPusher]: treesize reduction 20, result has 51.2 percent of original size [2021-05-01 06:40:11,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:11,684 INFO L142 QuantifierPusher]: treesize reduction 36, result has 52.6 percent of original size [2021-05-01 06:40:11,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:11,690 INFO L142 QuantifierPusher]: treesize reduction 24, result has 58.6 percent of original size [2021-05-01 06:40:11,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:11,708 INFO L142 QuantifierPusher]: treesize reduction 24, result has 58.6 percent of original size [2021-05-01 06:40:11,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:11,710 INFO L142 QuantifierPusher]: treesize reduction 54, result has 43.2 percent of original size [2021-05-01 06:40:11,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:40:11,731 INFO L142 QuantifierPusher]: treesize reduction 46, result has 58.2 percent of original size [2021-05-01 06:40:11,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-05-01 06:40:11,765 INFO L142 QuantifierPusher]: treesize reduction 46, result has 62.0 percent of original size [2021-05-01 06:40:11,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-05-01 06:40:11,803 INFO L142 QuantifierPusher]: treesize reduction 46, result has 61.3 percent of original size [2021-05-01 06:40:11,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-05-01 06:40:11,839 INFO L142 QuantifierPusher]: treesize reduction 18, result has 68.4 percent of original size [2021-05-01 06:40:11,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:11,864 INFO L142 QuantifierPusher]: treesize reduction 18, result has 68.4 percent of original size [2021-05-01 06:40:11,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:11,889 INFO L142 QuantifierPusher]: treesize reduction 18, result has 68.4 percent of original size [2021-05-01 06:40:11,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:11,913 INFO L142 QuantifierPusher]: treesize reduction 14, result has 73.6 percent of original size [2021-05-01 06:40:11,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:11,934 INFO L142 QuantifierPusher]: treesize reduction 9, result has 78.6 percent of original size [2021-05-01 06:40:11,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:11,951 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:11,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:11,967 INFO L142 QuantifierPusher]: treesize reduction 17, result has 67.9 percent of original size [2021-05-01 06:40:11,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:11,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:11,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:11,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:12,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:12,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:12,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:12,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:12,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:12,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:12,064 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:12,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:12,065 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 06:40:12,065 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:12,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832938680] [2021-05-01 06:40:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [832938680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:12,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:12,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-01 06:40:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480563292] [2021-05-01 06:40:12,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-01 06:40:12,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-01 06:40:12,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-01 06:40:12,067 INFO L87 Difference]: Start difference. First operand 212 states and 243 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 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 06:40:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:13,359 INFO L93 Difference]: Finished difference Result 333 states and 390 transitions. [2021-05-01 06:40:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-01 06:40:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 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 51 [2021-05-01 06:40:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:13,361 INFO L225 Difference]: With dead ends: 333 [2021-05-01 06:40:13,361 INFO L226 Difference]: Without dead ends: 331 [2021-05-01 06:40:13,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1009.3ms TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2021-05-01 06:40:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-01 06:40:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 232. [2021-05-01 06:40:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 216 states have (on average 1.1666666666666667) internal successors, (252), 221 states have internal predecessors, (252), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 06:40:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2021-05-01 06:40:13,410 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 51 [2021-05-01 06:40:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:13,410 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2021-05-01 06:40:13,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 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 06:40:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2021-05-01 06:40:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-01 06:40:13,411 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:13,411 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:13,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-01 06:40:13,411 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 6 times [2021-05-01 06:40:13,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:13,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271533613] [2021-05-01 06:40:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:13,415 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:13,417 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:13,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,460 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:13,460 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,460 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:13,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:13,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:13,473 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:13,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:13,476 INFO L142 QuantifierPusher]: treesize reduction 5, result has 76.2 percent of original size [2021-05-01 06:40:13,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-05-01 06:40:13,485 INFO L142 QuantifierPusher]: treesize reduction 4, result has 80.0 percent of original size [2021-05-01 06:40:13,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-05-01 06:40:13,495 INFO L142 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-05-01 06:40:13,495 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:13,503 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-05-01 06:40:13,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:13,512 INFO L142 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-05-01 06:40:13,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:13,519 INFO L142 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size [2021-05-01 06:40:13,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:13,539 INFO L142 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size [2021-05-01 06:40:13,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:13,558 INFO L142 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-05-01 06:40:13,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:13,581 INFO L142 QuantifierPusher]: treesize reduction 32, result has 55.6 percent of original size [2021-05-01 06:40:13,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:13,607 INFO L142 QuantifierPusher]: treesize reduction 19, result has 78.9 percent of original size [2021-05-01 06:40:13,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-05-01 06:40:13,647 INFO L142 QuantifierPusher]: treesize reduction 19, result has 78.4 percent of original size [2021-05-01 06:40:13,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-05-01 06:40:13,683 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:13,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:13,705 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:13,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:13,729 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:40:13,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:13,746 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:13,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:13,760 INFO L142 QuantifierPusher]: treesize reduction 17, result has 69.1 percent of original size [2021-05-01 06:40:13,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:13,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:13,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:13,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:13,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:13,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:13,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:13,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:13,854 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 06:40:13,854 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271533613] [2021-05-01 06:40:13,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [271533613] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:13,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:13,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-01 06:40:13,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22102802] [2021-05-01 06:40:13,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-01 06:40:13,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-01 06:40:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-05-01 06:40:13,856 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 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 06:40:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:15,073 INFO L93 Difference]: Finished difference Result 338 states and 403 transitions. [2021-05-01 06:40:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-01 06:40:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 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 51 [2021-05-01 06:40:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:15,076 INFO L225 Difference]: With dead ends: 338 [2021-05-01 06:40:15,076 INFO L226 Difference]: Without dead ends: 336 [2021-05-01 06:40:15,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 859.3ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-05-01 06:40:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-01 06:40:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 255. [2021-05-01 06:40:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.1875) internal successors, (285), 244 states have internal predecessors, (285), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 06:40:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 301 transitions. [2021-05-01 06:40:15,131 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 301 transitions. Word has length 51 [2021-05-01 06:40:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:15,131 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 301 transitions. [2021-05-01 06:40:15,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 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 06:40:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 301 transitions. [2021-05-01 06:40:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-01 06:40:15,132 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:15,132 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:15,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-01 06:40:15,132 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:15,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1824744982, now seen corresponding path program 2 times [2021-05-01 06:40:15,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:15,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388772209] [2021-05-01 06:40:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:15,135 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:15,136 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:15,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:15,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:15,187 INFO L142 QuantifierPusher]: treesize reduction 16, result has 38.5 percent of original size [2021-05-01 06:40:15,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:15,193 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:40:15,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:15,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:15,203 INFO L142 QuantifierPusher]: treesize reduction 32, result has 27.3 percent of original size [2021-05-01 06:40:15,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:15,207 INFO L142 QuantifierPusher]: treesize reduction 33, result has 42.1 percent of original size [2021-05-01 06:40:15,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:15,218 INFO L142 QuantifierPusher]: treesize reduction 33, result has 47.6 percent of original size [2021-05-01 06:40:15,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-05-01 06:40:15,224 INFO L142 QuantifierPusher]: treesize reduction 33, result has 57.1 percent of original size [2021-05-01 06:40:15,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-05-01 06:40:15,248 INFO L142 QuantifierPusher]: treesize reduction 33, result has 54.8 percent of original size [2021-05-01 06:40:15,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:15,266 INFO L142 QuantifierPusher]: treesize reduction 33, result has 55.4 percent of original size [2021-05-01 06:40:15,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:40:15,284 INFO L142 QuantifierPusher]: treesize reduction 35, result has 66.3 percent of original size [2021-05-01 06:40:15,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-05-01 06:40:15,321 INFO L142 QuantifierPusher]: treesize reduction 33, result has 72.7 percent of original size [2021-05-01 06:40:15,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-05-01 06:40:15,356 INFO L142 QuantifierPusher]: treesize reduction 35, result has 70.8 percent of original size [2021-05-01 06:40:15,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-05-01 06:40:15,386 INFO L142 QuantifierPusher]: treesize reduction 26, result has 60.6 percent of original size [2021-05-01 06:40:15,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:15,407 INFO L142 QuantifierPusher]: treesize reduction 21, result has 71.6 percent of original size [2021-05-01 06:40:15,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-05-01 06:40:15,430 INFO L142 QuantifierPusher]: treesize reduction 18, result has 77.2 percent of original size [2021-05-01 06:40:15,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-05-01 06:40:15,454 INFO L142 QuantifierPusher]: treesize reduction 18, result has 71.4 percent of original size [2021-05-01 06:40:15,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:15,462 INFO L142 QuantifierPusher]: treesize reduction 18, result has 71.4 percent of original size [2021-05-01 06:40:15,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:15,487 INFO L142 QuantifierPusher]: treesize reduction 18, result has 71.4 percent of original size [2021-05-01 06:40:15,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:15,513 INFO L142 QuantifierPusher]: treesize reduction 15, result has 75.0 percent of original size [2021-05-01 06:40:15,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:15,537 INFO L142 QuantifierPusher]: treesize reduction 14, result has 70.8 percent of original size [2021-05-01 06:40:15,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:15,556 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:15,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:15,572 INFO L142 QuantifierPusher]: treesize reduction 32, result has 54.3 percent of original size [2021-05-01 06:40:15,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:15,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:15,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:15,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:15,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:15,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:15,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:15,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:15,664 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 06:40:15,664 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:15,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388772209] [2021-05-01 06:40:15,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388772209] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:15,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:15,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-01 06:40:15,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066523762] [2021-05-01 06:40:15,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-01 06:40:15,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:15,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-01 06:40:15,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-05-01 06:40:15,666 INFO L87 Difference]: Start difference. First operand 255 states and 301 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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 06:40:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:16,535 INFO L93 Difference]: Finished difference Result 391 states and 466 transitions. [2021-05-01 06:40:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-01 06:40:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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 51 [2021-05-01 06:40:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:16,537 INFO L225 Difference]: With dead ends: 391 [2021-05-01 06:40:16,537 INFO L226 Difference]: Without dead ends: 317 [2021-05-01 06:40:16,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 751.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-05-01 06:40:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-01 06:40:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 267. [2021-05-01 06:40:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 252 states have (on average 1.1944444444444444) internal successors, (301), 256 states have internal predecessors, (301), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 06:40:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 317 transitions. [2021-05-01 06:40:16,598 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 317 transitions. Word has length 51 [2021-05-01 06:40:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:16,598 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 317 transitions. [2021-05-01 06:40:16,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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 06:40:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 317 transitions. [2021-05-01 06:40:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-01 06:40:16,599 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:16,599 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-05-01 06:40:16,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-01 06:40:16,599 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash 636186535, now seen corresponding path program 1 times [2021-05-01 06:40:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:16,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848279352] [2021-05-01 06:40:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:16,603 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:16,603 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:16,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:16,636 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:16,638 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,638 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:16,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:16,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:16,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:16,651 INFO L142 QuantifierPusher]: treesize reduction 8, result has 61.9 percent of original size [2021-05-01 06:40:16,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:16,660 INFO L142 QuantifierPusher]: treesize reduction 5, result has 81.5 percent of original size [2021-05-01 06:40:16,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:16,675 INFO L142 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size [2021-05-01 06:40:16,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:16,679 INFO L142 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size [2021-05-01 06:40:16,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:16,684 INFO L142 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size [2021-05-01 06:40:16,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:16,689 INFO L142 QuantifierPusher]: treesize reduction 15, result has 25.0 percent of original size [2021-05-01 06:40:16,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:16,695 INFO L142 QuantifierPusher]: treesize reduction 15, result has 25.0 percent of original size [2021-05-01 06:40:16,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:16,701 INFO L142 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-05-01 06:40:16,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:16,713 INFO L142 QuantifierPusher]: treesize reduction 14, result has 54.8 percent of original size [2021-05-01 06:40:16,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:16,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:16,734 INFO L142 QuantifierPusher]: treesize reduction 2, result has 90.5 percent of original size [2021-05-01 06:40:16,734 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:16,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:16,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:16,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:16,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,782 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:16,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:16,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:16,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:16,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-01 06:40:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:16,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:16,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:16,829 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 06:40:16,829 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:16,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848279352] [2021-05-01 06:40:16,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848279352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:16,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:16,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-01 06:40:16,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360247570] [2021-05-01 06:40:16,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-01 06:40:16,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:16,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-01 06:40:16,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-01 06:40:16,830 INFO L87 Difference]: Start difference. First operand 267 states and 317 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 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 06:40:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:17,712 INFO L93 Difference]: Finished difference Result 544 states and 666 transitions. [2021-05-01 06:40:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-01 06:40:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 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 54 [2021-05-01 06:40:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:17,714 INFO L225 Difference]: With dead ends: 544 [2021-05-01 06:40:17,714 INFO L226 Difference]: Without dead ends: 421 [2021-05-01 06:40:17,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2021-05-01 06:40:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-05-01 06:40:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 318. [2021-05-01 06:40:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 298 states have (on average 1.2013422818791946) internal successors, (358), 305 states have internal predecessors, (358), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 06:40:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 382 transitions. [2021-05-01 06:40:17,785 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 382 transitions. Word has length 54 [2021-05-01 06:40:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:17,785 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 382 transitions. [2021-05-01 06:40:17,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 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 06:40:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 382 transitions. [2021-05-01 06:40:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-01 06:40:17,786 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:17,786 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-05-01 06:40:17,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-01 06:40:17,786 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 2 times [2021-05-01 06:40:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:17,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871692355] [2021-05-01 06:40:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:17,790 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:17,791 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:17,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:17,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:17,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:17,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:17,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:17,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:17,846 INFO L142 QuantifierPusher]: treesize reduction 4, result has 80.0 percent of original size [2021-05-01 06:40:17,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-05-01 06:40:17,857 INFO L142 QuantifierPusher]: treesize reduction 30, result has 62.5 percent of original size [2021-05-01 06:40:17,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-01 06:40:17,871 INFO L142 QuantifierPusher]: treesize reduction 24, result has 11.1 percent of original size [2021-05-01 06:40:17,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:17,876 INFO L142 QuantifierPusher]: treesize reduction 37, result has 24.5 percent of original size [2021-05-01 06:40:17,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:17,884 INFO L142 QuantifierPusher]: treesize reduction 41, result has 33.9 percent of original size [2021-05-01 06:40:17,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:17,897 INFO L142 QuantifierPusher]: treesize reduction 33, result has 17.5 percent of original size [2021-05-01 06:40:17,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:17,900 INFO L142 QuantifierPusher]: treesize reduction 37, result has 30.2 percent of original size [2021-05-01 06:40:17,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-05-01 06:40:17,914 INFO L142 QuantifierPusher]: treesize reduction 28, result has 57.6 percent of original size [2021-05-01 06:40:17,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:17,938 INFO L142 QuantifierPusher]: treesize reduction 28, result has 65.9 percent of original size [2021-05-01 06:40:17,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-01 06:40:17,975 INFO L142 QuantifierPusher]: treesize reduction 28, result has 64.6 percent of original size [2021-05-01 06:40:17,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-05-01 06:40:18,009 INFO L142 QuantifierPusher]: treesize reduction 28, result has 65.0 percent of original size [2021-05-01 06:40:18,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:18,043 INFO L142 QuantifierPusher]: treesize reduction 20, result has 73.7 percent of original size [2021-05-01 06:40:18,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:40:18,077 INFO L142 QuantifierPusher]: treesize reduction 20, result has 72.6 percent of original size [2021-05-01 06:40:18,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-05-01 06:40:18,109 INFO L142 QuantifierPusher]: treesize reduction 20, result has 71.0 percent of original size [2021-05-01 06:40:18,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-05-01 06:40:18,136 INFO L142 QuantifierPusher]: treesize reduction 20, result has 63.0 percent of original size [2021-05-01 06:40:18,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:18,157 INFO L142 QuantifierPusher]: treesize reduction 21, result has 62.5 percent of original size [2021-05-01 06:40:18,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:18,179 INFO L142 QuantifierPusher]: treesize reduction 31, result has 69.0 percent of original size [2021-05-01 06:40:18,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-05-01 06:40:18,208 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-05-01 06:40:18,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:18,223 INFO L142 QuantifierPusher]: treesize reduction 24, result has 56.4 percent of original size [2021-05-01 06:40:18,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:18,246 INFO L142 QuantifierPusher]: treesize reduction 9, result has 74.3 percent of original size [2021-05-01 06:40:18,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:18,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:18,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:18,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:18,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:18,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:18,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:18,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:18,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:18,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:18,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:18,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:18,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-01 06:40:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:18,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:18,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:18,330 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 06:40:18,330 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:18,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871692355] [2021-05-01 06:40:18,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [871692355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:18,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:18,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-01 06:40:18,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308546615] [2021-05-01 06:40:18,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-01 06:40:18,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-01 06:40:18,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-01 06:40:18,331 INFO L87 Difference]: Start difference. First operand 318 states and 382 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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 06:40:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:19,442 INFO L93 Difference]: Finished difference Result 478 states and 571 transitions. [2021-05-01 06:40:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-01 06:40:19,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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 54 [2021-05-01 06:40:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:19,443 INFO L225 Difference]: With dead ends: 478 [2021-05-01 06:40:19,444 INFO L226 Difference]: Without dead ends: 384 [2021-05-01 06:40:19,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-05-01 06:40:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-05-01 06:40:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 321. [2021-05-01 06:40:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 308 states have internal predecessors, (361), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 06:40:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 385 transitions. [2021-05-01 06:40:19,520 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 385 transitions. Word has length 54 [2021-05-01 06:40:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:19,520 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 385 transitions. [2021-05-01 06:40:19,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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 06:40:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 385 transitions. [2021-05-01 06:40:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-01 06:40:19,521 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:19,521 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 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] [2021-05-01 06:40:19,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-01 06:40:19,521 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2021-05-01 06:40:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12746150] [2021-05-01 06:40:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:19,525 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:19,525 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:19,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:19,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:19,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:19,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:19,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:19,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:19,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:19,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:19,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:19,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:19,599 INFO L142 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size [2021-05-01 06:40:19,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:19,602 INFO L142 QuantifierPusher]: treesize reduction 14, result has 46.2 percent of original size [2021-05-01 06:40:19,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:19,609 INFO L142 QuantifierPusher]: treesize reduction 14, result has 56.3 percent of original size [2021-05-01 06:40:19,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:19,614 INFO L142 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-05-01 06:40:19,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-01 06:40:19,629 INFO L142 QuantifierPusher]: treesize reduction 14, result has 66.7 percent of original size [2021-05-01 06:40:19,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:19,645 INFO L142 QuantifierPusher]: treesize reduction 15, result has 65.9 percent of original size [2021-05-01 06:40:19,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:19,663 INFO L142 QuantifierPusher]: treesize reduction 43, result has 57.8 percent of original size [2021-05-01 06:40:19,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-05-01 06:40:19,689 INFO L142 QuantifierPusher]: treesize reduction 33, result has 71.6 percent of original size [2021-05-01 06:40:19,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-05-01 06:40:19,732 INFO L142 QuantifierPusher]: treesize reduction 33, result has 70.8 percent of original size [2021-05-01 06:40:19,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-05-01 06:40:19,768 INFO L142 QuantifierPusher]: treesize reduction 25, result has 46.8 percent of original size [2021-05-01 06:40:19,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:19,783 INFO L142 QuantifierPusher]: treesize reduction 24, result has 61.3 percent of original size [2021-05-01 06:40:19,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:19,804 INFO L142 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-05-01 06:40:19,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:19,826 INFO L142 QuantifierPusher]: treesize reduction 24, result has 55.6 percent of original size [2021-05-01 06:40:19,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-05-01 06:40:19,847 INFO L142 QuantifierPusher]: treesize reduction 13, result has 80.3 percent of original size [2021-05-01 06:40:19,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-05-01 06:40:19,871 INFO L142 QuantifierPusher]: treesize reduction 21, result has 74.1 percent of original size [2021-05-01 06:40:19,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-05-01 06:40:19,886 INFO L142 QuantifierPusher]: treesize reduction 22, result has 72.2 percent of original size [2021-05-01 06:40:19,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-05-01 06:40:19,910 INFO L142 QuantifierPusher]: treesize reduction 22, result has 65.6 percent of original size [2021-05-01 06:40:19,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-05-01 06:40:19,936 INFO L142 QuantifierPusher]: treesize reduction 18, result has 78.3 percent of original size [2021-05-01 06:40:19,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 06:40:19,979 INFO L142 QuantifierPusher]: treesize reduction 18, result has 81.3 percent of original size [2021-05-01 06:40:19,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-05-01 06:40:20,011 INFO L142 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-05-01 06:40:20,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-05-01 06:40:20,042 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-05-01 06:40:20,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:20,062 INFO L142 QuantifierPusher]: treesize reduction 23, result has 57.4 percent of original size [2021-05-01 06:40:20,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:20,095 INFO L142 QuantifierPusher]: treesize reduction 23, result has 59.6 percent of original size [2021-05-01 06:40:20,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:20,125 INFO L142 QuantifierPusher]: treesize reduction 23, result has 57.4 percent of original size [2021-05-01 06:40:20,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:20,126 INFO L142 QuantifierPusher]: treesize reduction 9, result has 74.3 percent of original size [2021-05-01 06:40:20,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:20,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:20,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:20,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:20,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:20,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:20,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:20,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:20,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:20,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:20,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:20,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:20,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-05-01 06:40:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:20,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:20,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:20,241 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 06:40:20,241 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:20,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12746150] [2021-05-01 06:40:20,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [12746150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:20,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:20,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-01 06:40:20,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093590088] [2021-05-01 06:40:20,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-01 06:40:20,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-01 06:40:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-01 06:40:20,242 INFO L87 Difference]: Start difference. First operand 321 states and 385 transitions. Second operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 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 06:40:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:21,508 INFO L93 Difference]: Finished difference Result 384 states and 463 transitions. [2021-05-01 06:40:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-01 06:40:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 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 56 [2021-05-01 06:40:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:21,510 INFO L225 Difference]: With dead ends: 384 [2021-05-01 06:40:21,510 INFO L226 Difference]: Without dead ends: 346 [2021-05-01 06:40:21,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1118.8ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-05-01 06:40:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-01 06:40:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 288. [2021-05-01 06:40:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 272 states have (on average 1.224264705882353) internal successors, (333), 277 states have internal predecessors, (333), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-01 06:40:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 352 transitions. [2021-05-01 06:40:21,577 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 352 transitions. Word has length 56 [2021-05-01 06:40:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:21,577 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 352 transitions. [2021-05-01 06:40:21,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 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 06:40:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 352 transitions. [2021-05-01 06:40:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-01 06:40:21,578 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:21,578 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:21,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-01 06:40:21,578 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2021-05-01 06:40:21,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:21,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856741474] [2021-05-01 06:40:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:21,603 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:21,604 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:21,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:21,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:21,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:21,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:21,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:21,669 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:21,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:21,671 INFO L142 QuantifierPusher]: treesize reduction 4, result has 78.9 percent of original size [2021-05-01 06:40:21,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:21,675 INFO L142 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-05-01 06:40:21,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:21,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:40:21,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:21,706 INFO L142 QuantifierPusher]: treesize reduction 19, result has 75.9 percent of original size [2021-05-01 06:40:21,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-05-01 06:40:21,735 INFO L142 QuantifierPusher]: treesize reduction 19, result has 74.0 percent of original size [2021-05-01 06:40:21,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-01 06:40:21,771 INFO L142 QuantifierPusher]: treesize reduction 19, result has 73.2 percent of original size [2021-05-01 06:40:21,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:21,801 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:21,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:21,813 INFO L142 QuantifierPusher]: treesize reduction 11, result has 64.5 percent of original size [2021-05-01 06:40:21,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:21,827 INFO L142 QuantifierPusher]: treesize reduction 10, result has 71.4 percent of original size [2021-05-01 06:40:21,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:21,844 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.7 percent of original size [2021-05-01 06:40:21,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:21,864 INFO L142 QuantifierPusher]: treesize reduction 10, result has 71.4 percent of original size [2021-05-01 06:40:21,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:21,866 INFO L142 QuantifierPusher]: treesize reduction 27, result has 70.3 percent of original size [2021-05-01 06:40:21,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-05-01 06:40:21,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:21,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:21,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:21,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:21,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:21,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:21,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 06:40:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:21,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:21,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-01 06:40:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:21,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:21,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:21,969 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 06:40:21,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:21,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856741474] [2021-05-01 06:40:21,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856741474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:21,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:21,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-01 06:40:21,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948696260] [2021-05-01 06:40:21,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-01 06:40:21,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:21,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-01 06:40:21,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-01 06:40:21,970 INFO L87 Difference]: Start difference. First operand 288 states and 352 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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 06:40:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:22,688 INFO L93 Difference]: Finished difference Result 468 states and 570 transitions. [2021-05-01 06:40:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-01 06:40:22,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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 57 [2021-05-01 06:40:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:22,690 INFO L225 Difference]: With dead ends: 468 [2021-05-01 06:40:22,690 INFO L226 Difference]: Without dead ends: 394 [2021-05-01 06:40:22,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 543.5ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-05-01 06:40:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-01 06:40:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 329. [2021-05-01 06:40:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 305 states have (on average 1.2065573770491804) internal successors, (368), 313 states have internal predecessors, (368), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-01 06:40:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 401 transitions. [2021-05-01 06:40:22,780 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 401 transitions. Word has length 57 [2021-05-01 06:40:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:22,780 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 401 transitions. [2021-05-01 06:40:22,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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 06:40:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 401 transitions. [2021-05-01 06:40:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-01 06:40:22,781 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:22,781 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:22,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-01 06:40:22,781 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:22,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1889457963, now seen corresponding path program 3 times [2021-05-01 06:40:22,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:22,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635872861] [2021-05-01 06:40:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:22,785 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:22,786 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:22,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:22,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:22,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:22,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:22,831 INFO L142 QuantifierPusher]: treesize reduction 16, result has 38.5 percent of original size [2021-05-01 06:40:22,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:22,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:22,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:22,840 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:22,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:22,843 INFO L142 QuantifierPusher]: treesize reduction 14, result has 54.8 percent of original size [2021-05-01 06:40:22,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:22,857 INFO L142 QuantifierPusher]: treesize reduction 13, result has 56.7 percent of original size [2021-05-01 06:40:22,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:22,868 INFO L142 QuantifierPusher]: treesize reduction 14, result has 54.8 percent of original size [2021-05-01 06:40:22,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:22,880 INFO L142 QuantifierPusher]: treesize reduction 15, result has 60.5 percent of original size [2021-05-01 06:40:22,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 06:40:22,890 INFO L142 QuantifierPusher]: treesize reduction 15, result has 71.2 percent of original size [2021-05-01 06:40:22,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:22,918 INFO L142 QuantifierPusher]: treesize reduction 15, result has 68.8 percent of original size [2021-05-01 06:40:22,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:22,944 INFO L142 QuantifierPusher]: treesize reduction 15, result has 69.4 percent of original size [2021-05-01 06:40:22,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:22,970 INFO L142 QuantifierPusher]: treesize reduction 39, result has 53.6 percent of original size [2021-05-01 06:40:22,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:23,001 INFO L142 QuantifierPusher]: treesize reduction 18, result has 82.9 percent of original size [2021-05-01 06:40:23,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-05-01 06:40:23,052 INFO L142 QuantifierPusher]: treesize reduction 20, result has 80.8 percent of original size [2021-05-01 06:40:23,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-05-01 06:40:23,092 INFO L142 QuantifierPusher]: treesize reduction 10, result has 81.8 percent of original size [2021-05-01 06:40:23,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:23,122 INFO L142 QuantifierPusher]: treesize reduction 10, result has 81.8 percent of original size [2021-05-01 06:40:23,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:23,142 INFO L142 QuantifierPusher]: treesize reduction 10, result has 81.8 percent of original size [2021-05-01 06:40:23,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:23,163 INFO L142 QuantifierPusher]: treesize reduction 25, result has 64.3 percent of original size [2021-05-01 06:40:23,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:23,189 INFO L142 QuantifierPusher]: treesize reduction 23, result has 59.6 percent of original size [2021-05-01 06:40:23,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:23,200 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:23,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:23,210 INFO L142 QuantifierPusher]: treesize reduction 17, result has 69.1 percent of original size [2021-05-01 06:40:23,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:23,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:23,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:23,235 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:23,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:23,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:23,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:23,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:23,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:23,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:23,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:23,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:23,278 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 06:40:23,279 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:23,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635872861] [2021-05-01 06:40:23,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635872861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:23,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:23,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-01 06:40:23,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542685186] [2021-05-01 06:40:23,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-01 06:40:23,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:23,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-01 06:40:23,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-05-01 06:40:23,280 INFO L87 Difference]: Start difference. First operand 329 states and 401 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 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 06:40:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:24,424 INFO L93 Difference]: Finished difference Result 383 states and 468 transitions. [2021-05-01 06:40:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-01 06:40:24,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 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 56 [2021-05-01 06:40:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:24,426 INFO L225 Difference]: With dead ends: 383 [2021-05-01 06:40:24,426 INFO L226 Difference]: Without dead ends: 381 [2021-05-01 06:40:24,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1072.2ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-05-01 06:40:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-01 06:40:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 333. [2021-05-01 06:40:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 308 states have (on average 1.2045454545454546) internal successors, (371), 316 states have internal predecessors, (371), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-01 06:40:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 404 transitions. [2021-05-01 06:40:24,506 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 404 transitions. Word has length 56 [2021-05-01 06:40:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:24,507 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 404 transitions. [2021-05-01 06:40:24,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 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 06:40:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 404 transitions. [2021-05-01 06:40:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-01 06:40:24,507 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:24,508 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:24,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-01 06:40:24,508 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash -439649873, now seen corresponding path program 2 times [2021-05-01 06:40:24,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:24,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361251593] [2021-05-01 06:40:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:24,511 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:24,512 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:24,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:24,535 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,535 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:24,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:24,541 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:24,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:24,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:24,559 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:40:24,565 INFO L142 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-05-01 06:40:24,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:24,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:24,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:24,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:24,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:24,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:24,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:24,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:24,642 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 06:40:24,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361251593] [2021-05-01 06:40:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [361251593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:24,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:24,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-01 06:40:24,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080272796] [2021-05-01 06:40:24,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-01 06:40:24,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-01 06:40:24,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-01 06:40:24,643 INFO L87 Difference]: Start difference. First operand 333 states and 404 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 06:40:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:25,059 INFO L93 Difference]: Finished difference Result 772 states and 946 transitions. [2021-05-01 06:40:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-01 06:40:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 57 [2021-05-01 06:40:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:25,062 INFO L225 Difference]: With dead ends: 772 [2021-05-01 06:40:25,062 INFO L226 Difference]: Without dead ends: 614 [2021-05-01 06:40:25,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-01 06:40:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-05-01 06:40:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 453. [2021-05-01 06:40:25,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 428 states have (on average 1.1822429906542056) internal successors, (506), 436 states have internal predecessors, (506), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-01 06:40:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 539 transitions. [2021-05-01 06:40:25,175 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 539 transitions. Word has length 57 [2021-05-01 06:40:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:25,175 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 539 transitions. [2021-05-01 06:40:25,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 06:40:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 539 transitions. [2021-05-01 06:40:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-01 06:40:25,176 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:25,177 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:25,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-01 06:40:25,177 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2021-05-01 06:40:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:25,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750112254] [2021-05-01 06:40:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:25,180 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:25,181 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:25,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:25,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:25,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:25,224 INFO L142 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-05-01 06:40:25,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:25,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-05-01 06:40:25,234 INFO L142 QuantifierPusher]: treesize reduction 36, result has 26.5 percent of original size [2021-05-01 06:40:25,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:25,244 INFO L142 QuantifierPusher]: treesize reduction 28, result has 24.3 percent of original size [2021-05-01 06:40:25,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:40:25,252 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-05-01 06:40:25,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:25,265 INFO L142 QuantifierPusher]: treesize reduction 27, result has 46.0 percent of original size [2021-05-01 06:40:25,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 06:40:25,278 INFO L142 QuantifierPusher]: treesize reduction 27, result has 42.6 percent of original size [2021-05-01 06:40:25,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:25,288 INFO L142 QuantifierPusher]: treesize reduction 5, result has 83.3 percent of original size [2021-05-01 06:40:25,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:25,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:25,310 INFO L142 QuantifierPusher]: treesize reduction 2, result has 91.3 percent of original size [2021-05-01 06:40:25,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:25,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:25,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:25,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:25,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:25,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:25,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:25,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:25,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-01 06:40:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:25,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:25,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:25,412 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 06:40:25,412 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:25,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750112254] [2021-05-01 06:40:25,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [750112254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:25,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:25,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-01 06:40:25,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926473484] [2021-05-01 06:40:25,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-01 06:40:25,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-01 06:40:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-05-01 06:40:25,413 INFO L87 Difference]: Start difference. First operand 453 states and 539 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 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 06:40:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:26,438 INFO L93 Difference]: Finished difference Result 537 states and 644 transitions. [2021-05-01 06:40:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-01 06:40:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 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 59 [2021-05-01 06:40:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:26,441 INFO L225 Difference]: With dead ends: 537 [2021-05-01 06:40:26,441 INFO L226 Difference]: Without dead ends: 535 [2021-05-01 06:40:26,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-05-01 06:40:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-01 06:40:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 465. [2021-05-01 06:40:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 439 states have (on average 1.182232346241458) internal successors, (519), 448 states have internal predecessors, (519), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-01 06:40:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 554 transitions. [2021-05-01 06:40:26,560 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 554 transitions. Word has length 59 [2021-05-01 06:40:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:26,560 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 554 transitions. [2021-05-01 06:40:26,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 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 06:40:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 554 transitions. [2021-05-01 06:40:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-01 06:40:26,561 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:26,562 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 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 06:40:26,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-01 06:40:26,562 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2021-05-01 06:40:26,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:26,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178779438] [2021-05-01 06:40:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:26,565 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:26,566 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:26,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:26,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:26,633 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:26,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:26,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:26,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:26,644 INFO L142 QuantifierPusher]: treesize reduction 27, result has 60.3 percent of original size [2021-05-01 06:40:26,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:40:26,658 INFO L142 QuantifierPusher]: treesize reduction 27, result has 55.0 percent of original size [2021-05-01 06:40:26,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:26,662 INFO L142 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-05-01 06:40:26,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:26,677 INFO L142 QuantifierPusher]: treesize reduction 14, result has 73.6 percent of original size [2021-05-01 06:40:26,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:26,683 INFO L142 QuantifierPusher]: treesize reduction 18, result has 59.1 percent of original size [2021-05-01 06:40:26,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:26,694 INFO L142 QuantifierPusher]: treesize reduction 18, result has 50.0 percent of original size [2021-05-01 06:40:26,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:26,703 INFO L142 QuantifierPusher]: treesize reduction 41, result has 38.8 percent of original size [2021-05-01 06:40:26,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:26,709 INFO L142 QuantifierPusher]: treesize reduction 46, result has 66.9 percent of original size [2021-05-01 06:40:26,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-05-01 06:40:26,739 INFO L142 QuantifierPusher]: treesize reduction 47, result has 68.5 percent of original size [2021-05-01 06:40:26,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-05-01 06:40:26,771 INFO L142 QuantifierPusher]: treesize reduction 49, result has 65.2 percent of original size [2021-05-01 06:40:26,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-05-01 06:40:26,805 INFO L142 QuantifierPusher]: treesize reduction 49, result has 65.0 percent of original size [2021-05-01 06:40:26,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-05-01 06:40:26,834 INFO L142 QuantifierPusher]: treesize reduction 38, result has 55.3 percent of original size [2021-05-01 06:40:26,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:26,855 INFO L142 QuantifierPusher]: treesize reduction 43, result has 53.3 percent of original size [2021-05-01 06:40:26,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-05-01 06:40:26,879 INFO L142 QuantifierPusher]: treesize reduction 38, result has 63.5 percent of original size [2021-05-01 06:40:26,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-05-01 06:40:26,911 INFO L142 QuantifierPusher]: treesize reduction 38, result has 57.3 percent of original size [2021-05-01 06:40:26,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-05-01 06:40:26,944 INFO L142 QuantifierPusher]: treesize reduction 37, result has 70.4 percent of original size [2021-05-01 06:40:26,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-05-01 06:40:26,997 INFO L142 QuantifierPusher]: treesize reduction 58, result has 59.4 percent of original size [2021-05-01 06:40:26,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-05-01 06:40:27,046 INFO L142 QuantifierPusher]: treesize reduction 58, result has 58.6 percent of original size [2021-05-01 06:40:27,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-05-01 06:40:27,081 INFO L142 QuantifierPusher]: treesize reduction 58, result has 53.6 percent of original size [2021-05-01 06:40:27,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-05-01 06:40:27,115 INFO L142 QuantifierPusher]: treesize reduction 25, result has 66.7 percent of original size [2021-05-01 06:40:27,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-01 06:40:27,146 INFO L142 QuantifierPusher]: treesize reduction 24, result has 66.2 percent of original size [2021-05-01 06:40:27,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:27,177 INFO L142 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-05-01 06:40:27,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:27,216 INFO L142 QuantifierPusher]: treesize reduction 24, result has 54.7 percent of original size [2021-05-01 06:40:27,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:27,241 INFO L142 QuantifierPusher]: treesize reduction 25, result has 54.5 percent of original size [2021-05-01 06:40:27,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-05-01 06:40:27,265 INFO L142 QuantifierPusher]: treesize reduction 14, result has 70.8 percent of original size [2021-05-01 06:40:27,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:27,287 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:27,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:27,308 INFO L142 QuantifierPusher]: treesize reduction 33, result has 46.8 percent of original size [2021-05-01 06:40:27,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:27,335 INFO L142 QuantifierPusher]: treesize reduction 9, result has 72.7 percent of original size [2021-05-01 06:40:27,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:27,356 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:27,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:27,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:27,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:27,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:27,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:27,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:27,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:27,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:27,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:27,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:27,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-01 06:40:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:27,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:27,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:27,452 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 06:40:27,452 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:27,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178779438] [2021-05-01 06:40:27,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [178779438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:27,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:27,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-01 06:40:27,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065615296] [2021-05-01 06:40:27,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-01 06:40:27,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:27,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-01 06:40:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-01 06:40:27,453 INFO L87 Difference]: Start difference. First operand 465 states and 554 transitions. Second operand has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 06:40:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:29,881 INFO L93 Difference]: Finished difference Result 546 states and 645 transitions. [2021-05-01 06:40:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-01 06:40:29,882 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 59 [2021-05-01 06:40:29,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:29,883 INFO L225 Difference]: With dead ends: 546 [2021-05-01 06:40:29,883 INFO L226 Difference]: Without dead ends: 544 [2021-05-01 06:40:29,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2141.6ms TimeCoverageRelationStatistics Valid=643, Invalid=4327, Unknown=0, NotChecked=0, Total=4970 [2021-05-01 06:40:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-01 06:40:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 469. [2021-05-01 06:40:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 442 states have (on average 1.1809954751131222) internal successors, (522), 451 states have internal predecessors, (522), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-01 06:40:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 557 transitions. [2021-05-01 06:40:30,002 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 557 transitions. Word has length 59 [2021-05-01 06:40:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:30,003 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 557 transitions. [2021-05-01 06:40:30,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 06:40:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 557 transitions. [2021-05-01 06:40:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-01 06:40:30,004 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:30,004 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:30,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-01 06:40:30,004 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash -403648979, now seen corresponding path program 3 times [2021-05-01 06:40:30,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:30,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459683486] [2021-05-01 06:40:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:30,008 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:30,008 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:30,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:30,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:30,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:30,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:30,057 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:30,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:30,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:30,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:30,072 INFO L142 QuantifierPusher]: treesize reduction 4, result has 80.0 percent of original size [2021-05-01 06:40:30,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-05-01 06:40:30,083 INFO L142 QuantifierPusher]: treesize reduction 30, result has 51.6 percent of original size [2021-05-01 06:40:30,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-01 06:40:30,114 INFO L142 QuantifierPusher]: treesize reduction 22, result has 69.0 percent of original size [2021-05-01 06:40:30,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-05-01 06:40:30,135 INFO L142 QuantifierPusher]: treesize reduction 27, result has 69.0 percent of original size [2021-05-01 06:40:30,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-05-01 06:40:30,166 INFO L142 QuantifierPusher]: treesize reduction 22, result has 72.2 percent of original size [2021-05-01 06:40:30,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-05-01 06:40:30,192 INFO L142 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-05-01 06:40:30,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:30,214 INFO L142 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-05-01 06:40:30,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:30,236 INFO L142 QuantifierPusher]: treesize reduction 9, result has 78.6 percent of original size [2021-05-01 06:40:30,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:30,251 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:30,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:30,265 INFO L142 QuantifierPusher]: treesize reduction 17, result has 67.9 percent of original size [2021-05-01 06:40:30,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:30,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:30,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:30,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:30,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:30,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:30,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:30,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:30,354 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 06:40:30,354 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:30,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459683486] [2021-05-01 06:40:30,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1459683486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:30,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:30,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-01 06:40:30,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789816957] [2021-05-01 06:40:30,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-01 06:40:30,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:30,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-01 06:40:30,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-01 06:40:30,355 INFO L87 Difference]: Start difference. First operand 469 states and 557 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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 06:40:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:31,399 INFO L93 Difference]: Finished difference Result 534 states and 636 transitions. [2021-05-01 06:40:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-01 06:40:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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 59 [2021-05-01 06:40:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:31,401 INFO L225 Difference]: With dead ends: 534 [2021-05-01 06:40:31,401 INFO L226 Difference]: Without dead ends: 532 [2021-05-01 06:40:31,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2021-05-01 06:40:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-01 06:40:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 477. [2021-05-01 06:40:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 451 states have (on average 1.1840354767184036) internal successors, (534), 459 states have internal predecessors, (534), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-01 06:40:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 567 transitions. [2021-05-01 06:40:31,527 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 567 transitions. Word has length 59 [2021-05-01 06:40:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:31,527 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 567 transitions. [2021-05-01 06:40:31,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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 06:40:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 567 transitions. [2021-05-01 06:40:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-01 06:40:31,528 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:31,528 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:31,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-01 06:40:31,529 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1813715541, now seen corresponding path program 4 times [2021-05-01 06:40:31,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:31,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775503553] [2021-05-01 06:40:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:31,541 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:31,542 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:31,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:31,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:31,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:31,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:31,596 INFO L142 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size [2021-05-01 06:40:31,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:31,606 INFO L142 QuantifierPusher]: treesize reduction 10, result has 64.3 percent of original size [2021-05-01 06:40:31,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:31,613 INFO L142 QuantifierPusher]: treesize reduction 24, result has 52.0 percent of original size [2021-05-01 06:40:31,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:31,617 INFO L142 QuantifierPusher]: treesize reduction 28, result has 55.6 percent of original size [2021-05-01 06:40:31,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:31,633 INFO L142 QuantifierPusher]: treesize reduction 28, result has 59.4 percent of original size [2021-05-01 06:40:31,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:40:31,638 INFO L142 QuantifierPusher]: treesize reduction 28, result has 65.9 percent of original size [2021-05-01 06:40:31,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-01 06:40:31,662 INFO L142 QuantifierPusher]: treesize reduction 28, result has 64.6 percent of original size [2021-05-01 06:40:31,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-05-01 06:40:31,682 INFO L142 QuantifierPusher]: treesize reduction 28, result has 65.0 percent of original size [2021-05-01 06:40:31,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:31,702 INFO L142 QuantifierPusher]: treesize reduction 53, result has 50.9 percent of original size [2021-05-01 06:40:31,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-05-01 06:40:31,741 INFO L142 QuantifierPusher]: treesize reduction 89, result has 35.0 percent of original size [2021-05-01 06:40:31,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-05-01 06:40:31,774 INFO L142 QuantifierPusher]: treesize reduction 89, result has 33.6 percent of original size [2021-05-01 06:40:31,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:31,801 INFO L142 QuantifierPusher]: treesize reduction 18, result has 72.3 percent of original size [2021-05-01 06:40:31,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:31,823 INFO L142 QuantifierPusher]: treesize reduction 15, result has 78.3 percent of original size [2021-05-01 06:40:31,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-01 06:40:31,846 INFO L142 QuantifierPusher]: treesize reduction 14, result has 80.3 percent of original size [2021-05-01 06:40:31,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-05-01 06:40:31,873 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:31,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:31,897 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:31,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:31,921 INFO L142 QuantifierPusher]: treesize reduction 10, result has 84.8 percent of original size [2021-05-01 06:40:31,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:40:31,949 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:31,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:31,950 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:31,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:31,975 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:31,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:32,000 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:40:32,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:32,021 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:32,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:32,039 INFO L142 QuantifierPusher]: treesize reduction 32, result has 54.3 percent of original size [2021-05-01 06:40:32,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:32,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:32,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:32,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:32,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:32,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:32,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:32,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:32,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:32,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:32,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:32,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:32,135 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 06:40:32,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:32,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775503553] [2021-05-01 06:40:32,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [775503553] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:32,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:32,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-01 06:40:32,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398040369] [2021-05-01 06:40:32,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-01 06:40:32,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:32,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-01 06:40:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-05-01 06:40:32,136 INFO L87 Difference]: Start difference. First operand 477 states and 567 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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 06:40:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:33,321 INFO L93 Difference]: Finished difference Result 654 states and 777 transitions. [2021-05-01 06:40:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-01 06:40:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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 59 [2021-05-01 06:40:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:33,324 INFO L225 Difference]: With dead ends: 654 [2021-05-01 06:40:33,324 INFO L226 Difference]: Without dead ends: 556 [2021-05-01 06:40:33,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 868.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2021-05-01 06:40:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-05-01 06:40:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 501. [2021-05-01 06:40:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 472 states have (on average 1.1822033898305084) internal successors, (558), 482 states have internal predecessors, (558), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 06:40:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 595 transitions. [2021-05-01 06:40:33,451 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 595 transitions. Word has length 59 [2021-05-01 06:40:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:33,451 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 595 transitions. [2021-05-01 06:40:33,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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 06:40:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 595 transitions. [2021-05-01 06:40:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-01 06:40:33,452 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:33,452 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:33,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-01 06:40:33,452 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash -715377509, now seen corresponding path program 5 times [2021-05-01 06:40:33,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:33,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568844625] [2021-05-01 06:40:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:33,457 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:33,458 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:33,529 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:33,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:33,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:33,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:33,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:33,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:33,535 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.4 percent of original size [2021-05-01 06:40:33,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:40:33,548 INFO L142 QuantifierPusher]: treesize reduction 10, result has 76.7 percent of original size [2021-05-01 06:40:33,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:33,551 INFO L142 QuantifierPusher]: treesize reduction 10, result has 77.8 percent of original size [2021-05-01 06:40:33,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:33,562 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.0 percent of original size [2021-05-01 06:40:33,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:40:33,567 INFO L142 QuantifierPusher]: treesize reduction 10, result has 77.8 percent of original size [2021-05-01 06:40:33,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:33,585 INFO L142 QuantifierPusher]: treesize reduction 10, result has 73.0 percent of original size [2021-05-01 06:40:33,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:40:33,591 INFO L142 QuantifierPusher]: treesize reduction 10, result has 72.2 percent of original size [2021-05-01 06:40:33,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:33,602 INFO L142 QuantifierPusher]: treesize reduction 10, result has 64.3 percent of original size [2021-05-01 06:40:33,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:33,613 INFO L142 QuantifierPusher]: treesize reduction 12, result has 63.6 percent of original size [2021-05-01 06:40:33,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 06:40:33,617 INFO L142 QuantifierPusher]: treesize reduction 25, result has 79.5 percent of original size [2021-05-01 06:40:33,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-05-01 06:40:33,646 INFO L142 QuantifierPusher]: treesize reduction 36, result has 73.3 percent of original size [2021-05-01 06:40:33,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-05-01 06:40:33,672 INFO L142 QuantifierPusher]: treesize reduction 36, result has 75.5 percent of original size [2021-05-01 06:40:33,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-05-01 06:40:33,700 INFO L142 QuantifierPusher]: treesize reduction 36, result has 75.0 percent of original size [2021-05-01 06:40:33,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-05-01 06:40:33,727 INFO L142 QuantifierPusher]: treesize reduction 36, result has 72.3 percent of original size [2021-05-01 06:40:33,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-05-01 06:40:33,757 INFO L142 QuantifierPusher]: treesize reduction 22, result has 79.8 percent of original size [2021-05-01 06:40:33,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-05-01 06:40:33,795 INFO L142 QuantifierPusher]: treesize reduction 20, result has 82.6 percent of original size [2021-05-01 06:40:33,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-05-01 06:40:33,838 INFO L142 QuantifierPusher]: treesize reduction 22, result has 80.7 percent of original size [2021-05-01 06:40:33,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-05-01 06:40:33,893 INFO L142 QuantifierPusher]: treesize reduction 20, result has 79.6 percent of original size [2021-05-01 06:40:33,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-05-01 06:40:33,927 INFO L142 QuantifierPusher]: treesize reduction 24, result has 79.5 percent of original size [2021-05-01 06:40:33,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-05-01 06:40:33,956 INFO L142 QuantifierPusher]: treesize reduction 19, result has 86.8 percent of original size [2021-05-01 06:40:33,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-05-01 06:40:33,989 INFO L142 QuantifierPusher]: treesize reduction 19, result has 83.0 percent of original size [2021-05-01 06:40:33,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-05-01 06:40:33,991 INFO L142 QuantifierPusher]: treesize reduction 19, result has 83.0 percent of original size [2021-05-01 06:40:33,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-05-01 06:40:34,025 INFO L142 QuantifierPusher]: treesize reduction 19, result has 84.0 percent of original size [2021-05-01 06:40:34,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-05-01 06:40:34,068 INFO L142 QuantifierPusher]: treesize reduction 24, result has 81.4 percent of original size [2021-05-01 06:40:34,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-05-01 06:40:34,107 INFO L142 QuantifierPusher]: treesize reduction 23, result has 81.1 percent of original size [2021-05-01 06:40:34,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-05-01 06:40:34,149 INFO L142 QuantifierPusher]: treesize reduction 23, result has 81.1 percent of original size [2021-05-01 06:40:34,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-05-01 06:40:34,169 INFO L142 QuantifierPusher]: treesize reduction 19, result has 79.1 percent of original size [2021-05-01 06:40:34,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-05-01 06:40:34,201 INFO L142 QuantifierPusher]: treesize reduction 19, result has 79.1 percent of original size [2021-05-01 06:40:34,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-05-01 06:40:34,232 INFO L142 QuantifierPusher]: treesize reduction 40, result has 45.2 percent of original size [2021-05-01 06:40:34,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:34,253 INFO L142 QuantifierPusher]: treesize reduction 24, result has 41.5 percent of original size [2021-05-01 06:40:34,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:34,272 INFO L142 QuantifierPusher]: treesize reduction 59, result has 37.9 percent of original size [2021-05-01 06:40:34,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:40:34,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:34,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:34,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:34,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:34,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:34,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:34,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:34,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:34,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:34,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:34,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:34,382 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 06:40:34,382 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:34,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568844625] [2021-05-01 06:40:34,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [568844625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:34,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:34,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-01 06:40:34,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519433586] [2021-05-01 06:40:34,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-01 06:40:34,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-01 06:40:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-05-01 06:40:34,383 INFO L87 Difference]: Start difference. First operand 501 states and 595 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 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 06:40:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:36,322 INFO L93 Difference]: Finished difference Result 610 states and 726 transitions. [2021-05-01 06:40:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-01 06:40:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 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 59 [2021-05-01 06:40:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:36,325 INFO L225 Difference]: With dead ends: 610 [2021-05-01 06:40:36,325 INFO L226 Difference]: Without dead ends: 608 [2021-05-01 06:40:36,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1551.7ms TimeCoverageRelationStatistics Valid=544, Invalid=2762, Unknown=0, NotChecked=0, Total=3306 [2021-05-01 06:40:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-05-01 06:40:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 501. [2021-05-01 06:40:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 472 states have (on average 1.1822033898305084) internal successors, (558), 482 states have internal predecessors, (558), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 06:40:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 595 transitions. [2021-05-01 06:40:36,470 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 595 transitions. Word has length 59 [2021-05-01 06:40:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:36,470 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 595 transitions. [2021-05-01 06:40:36,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 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 06:40:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 595 transitions. [2021-05-01 06:40:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-01 06:40:36,471 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:36,471 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:36,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-01 06:40:36,472 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 2 times [2021-05-01 06:40:36,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:36,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636617260] [2021-05-01 06:40:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:36,476 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:36,476 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:36,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:36,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:36,516 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:36,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:36,529 INFO L142 QuantifierPusher]: treesize reduction 21, result has 70.4 percent of original size [2021-05-01 06:40:36,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-01 06:40:36,543 INFO L142 QuantifierPusher]: treesize reduction 16, result has 15.8 percent of original size [2021-05-01 06:40:36,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:36,548 INFO L142 QuantifierPusher]: treesize reduction 17, result has 29.2 percent of original size [2021-05-01 06:40:36,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:36,551 INFO L142 QuantifierPusher]: treesize reduction 22, result has 33.3 percent of original size [2021-05-01 06:40:36,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:40:36,560 INFO L142 QuantifierPusher]: treesize reduction 73, result has 13.1 percent of original size [2021-05-01 06:40:36,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:40:36,572 INFO L142 QuantifierPusher]: treesize reduction 34, result has 64.9 percent of original size [2021-05-01 06:40:36,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-05-01 06:40:36,604 INFO L142 QuantifierPusher]: treesize reduction 31, result has 69.0 percent of original size [2021-05-01 06:40:36,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-05-01 06:40:36,636 INFO L142 QuantifierPusher]: treesize reduction 35, result has 67.0 percent of original size [2021-05-01 06:40:36,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-05-01 06:40:36,668 INFO L142 QuantifierPusher]: treesize reduction 26, result has 70.1 percent of original size [2021-05-01 06:40:36,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-05-01 06:40:36,693 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:36,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:36,706 INFO L142 QuantifierPusher]: treesize reduction 11, result has 64.5 percent of original size [2021-05-01 06:40:36,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:36,720 INFO L142 QuantifierPusher]: treesize reduction 10, result has 71.4 percent of original size [2021-05-01 06:40:36,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:36,738 INFO L142 QuantifierPusher]: treesize reduction 26, result has 68.3 percent of original size [2021-05-01 06:40:36,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:40:36,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:36,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:36,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:36,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:36,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:36,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:36,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-01 06:40:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:36,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:36,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-01 06:40:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:36,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:36,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:36,847 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 06:40:36,847 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636617260] [2021-05-01 06:40:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [636617260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:36,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:36,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-01 06:40:36,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063135430] [2021-05-01 06:40:36,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-01 06:40:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-01 06:40:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-01 06:40:36,848 INFO L87 Difference]: Start difference. First operand 501 states and 595 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 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 06:40:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:37,858 INFO L93 Difference]: Finished difference Result 579 states and 690 transitions. [2021-05-01 06:40:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-01 06:40:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 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 62 [2021-05-01 06:40:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:37,860 INFO L225 Difference]: With dead ends: 579 [2021-05-01 06:40:37,860 INFO L226 Difference]: Without dead ends: 577 [2021-05-01 06:40:37,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-05-01 06:40:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-05-01 06:40:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 498. [2021-05-01 06:40:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 469 states have (on average 1.183368869936034) internal successors, (555), 479 states have internal predecessors, (555), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 06:40:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 592 transitions. [2021-05-01 06:40:37,995 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 592 transitions. Word has length 62 [2021-05-01 06:40:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:37,996 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 592 transitions. [2021-05-01 06:40:37,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 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 06:40:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 592 transitions. [2021-05-01 06:40:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-01 06:40:37,997 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:37,997 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 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 06:40:37,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-01 06:40:37,997 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 3 times [2021-05-01 06:40:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:37,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133619568] [2021-05-01 06:40:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:38,002 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:38,003 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:38,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:38,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:38,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:38,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:38,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:38,068 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:38,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:38,071 INFO L142 QuantifierPusher]: treesize reduction 19, result has 44.1 percent of original size [2021-05-01 06:40:38,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:38,075 INFO L142 QuantifierPusher]: treesize reduction 22, result has 56.9 percent of original size [2021-05-01 06:40:38,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:38,092 INFO L142 QuantifierPusher]: treesize reduction 27, result has 61.4 percent of original size [2021-05-01 06:40:38,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-05-01 06:40:38,117 INFO L142 QuantifierPusher]: treesize reduction 22, result has 64.5 percent of original size [2021-05-01 06:40:38,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:38,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:38,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:38,184 INFO L142 QuantifierPusher]: treesize reduction 28, result has 75.9 percent of original size [2021-05-01 06:40:38,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-05-01 06:40:38,227 INFO L142 QuantifierPusher]: treesize reduction 19, result has 56.8 percent of original size [2021-05-01 06:40:38,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:38,228 INFO L142 QuantifierPusher]: treesize reduction 19, result has 56.8 percent of original size [2021-05-01 06:40:38,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:38,244 INFO L142 QuantifierPusher]: treesize reduction 19, result has 56.8 percent of original size [2021-05-01 06:40:38,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:38,262 INFO L142 QuantifierPusher]: treesize reduction 27, result has 71.3 percent of original size [2021-05-01 06:40:38,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-05-01 06:40:38,288 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:38,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:38,303 INFO L142 QuantifierPusher]: treesize reduction 11, result has 66.7 percent of original size [2021-05-01 06:40:38,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:38,320 INFO L142 QuantifierPusher]: treesize reduction 9, result has 72.7 percent of original size [2021-05-01 06:40:38,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:38,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:38,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:38,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:38,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:38,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:38,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:38,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-01 06:40:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:38,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:38,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:38,408 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 06:40:38,408 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:38,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133619568] [2021-05-01 06:40:38,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133619568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:38,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:38,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-01 06:40:38,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791683405] [2021-05-01 06:40:38,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-01 06:40:38,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-01 06:40:38,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-01 06:40:38,409 INFO L87 Difference]: Start difference. First operand 498 states and 592 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 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 06:40:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:39,510 INFO L93 Difference]: Finished difference Result 630 states and 755 transitions. [2021-05-01 06:40:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-01 06:40:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 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 62 [2021-05-01 06:40:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:39,513 INFO L225 Difference]: With dead ends: 630 [2021-05-01 06:40:39,513 INFO L226 Difference]: Without dead ends: 628 [2021-05-01 06:40:39,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2021-05-01 06:40:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-05-01 06:40:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 528. [2021-05-01 06:40:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 497 states have (on average 1.1891348088531186) internal successors, (591), 509 states have internal predecessors, (591), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 7 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-01 06:40:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 630 transitions. [2021-05-01 06:40:39,663 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 630 transitions. Word has length 62 [2021-05-01 06:40:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:39,663 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 630 transitions. [2021-05-01 06:40:39,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 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 06:40:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 630 transitions. [2021-05-01 06:40:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-01 06:40:39,664 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:39,664 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 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 06:40:39,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-01 06:40:39,664 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2048520356, now seen corresponding path program 4 times [2021-05-01 06:40:39,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:39,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795305242] [2021-05-01 06:40:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:39,668 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:39,669 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:39,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:39,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:39,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:39,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:39,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:39,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:39,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:39,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:39,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:40:39,737 INFO L142 QuantifierPusher]: treesize reduction 14, result has 44.0 percent of original size [2021-05-01 06:40:39,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:40:39,746 INFO L142 QuantifierPusher]: treesize reduction 14, result has 44.0 percent of original size [2021-05-01 06:40:39,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 06:40:39,755 INFO L142 QuantifierPusher]: treesize reduction 14, result has 63.2 percent of original size [2021-05-01 06:40:39,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:39,769 INFO L142 QuantifierPusher]: treesize reduction 14, result has 61.1 percent of original size [2021-05-01 06:40:39,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:39,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:39,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:39,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:39,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:39,838 INFO L142 QuantifierPusher]: treesize reduction 2, result has 90.5 percent of original size [2021-05-01 06:40:39,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:39,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:39,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,867 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:39,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:39,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:39,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:39,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:39,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:39,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-01 06:40:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:39,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:39,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:39,942 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 06:40:39,942 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:39,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795305242] [2021-05-01 06:40:39,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795305242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:39,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:39,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-01 06:40:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218655389] [2021-05-01 06:40:39,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-01 06:40:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:39,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-01 06:40:39,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-01 06:40:39,943 INFO L87 Difference]: Start difference. First operand 528 states and 630 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 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 06:40:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:41,138 INFO L93 Difference]: Finished difference Result 696 states and 837 transitions. [2021-05-01 06:40:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-01 06:40:41,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 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 62 [2021-05-01 06:40:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:41,140 INFO L225 Difference]: With dead ends: 696 [2021-05-01 06:40:41,140 INFO L226 Difference]: Without dead ends: 694 [2021-05-01 06:40:41,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-05-01 06:40:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-05-01 06:40:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 522. [2021-05-01 06:40:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 494 states have (on average 1.1983805668016194) internal successors, (592), 504 states have internal predecessors, (592), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-01 06:40:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 627 transitions. [2021-05-01 06:40:41,293 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 627 transitions. Word has length 62 [2021-05-01 06:40:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:41,293 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 627 transitions. [2021-05-01 06:40:41,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 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 06:40:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 627 transitions. [2021-05-01 06:40:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-01 06:40:41,295 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:41,295 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 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 06:40:41,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-01 06:40:41,295 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1980682524, now seen corresponding path program 3 times [2021-05-01 06:40:41,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:41,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390381810] [2021-05-01 06:40:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:41,300 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:41,301 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:41,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:41,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:41,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:41,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:41,410 INFO L142 QuantifierPusher]: treesize reduction 56, result has 30.9 percent of original size [2021-05-01 06:40:41,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:41,423 INFO L142 QuantifierPusher]: treesize reduction 24, result has 47.8 percent of original size [2021-05-01 06:40:41,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 06:40:41,438 INFO L142 QuantifierPusher]: treesize reduction 33, result has 8.3 percent of original size [2021-05-01 06:40:41,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:41,445 INFO L142 QuantifierPusher]: treesize reduction 34, result has 17.1 percent of original size [2021-05-01 06:40:41,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:41,448 INFO L142 QuantifierPusher]: treesize reduction 43, result has 29.5 percent of original size [2021-05-01 06:40:41,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:41,462 INFO L142 QuantifierPusher]: treesize reduction 43, result has 25.9 percent of original size [2021-05-01 06:40:41,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:41,477 INFO L142 QuantifierPusher]: treesize reduction 44, result has 21.4 percent of original size [2021-05-01 06:40:41,478 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:41,491 INFO L142 QuantifierPusher]: treesize reduction 38, result has 15.6 percent of original size [2021-05-01 06:40:41,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:41,495 INFO L142 QuantifierPusher]: treesize reduction 52, result has 30.7 percent of original size [2021-05-01 06:40:41,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 06:40:41,503 INFO L142 QuantifierPusher]: treesize reduction 47, result has 44.0 percent of original size [2021-05-01 06:40:41,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:41,528 INFO L142 QuantifierPusher]: treesize reduction 37, result has 63.4 percent of original size [2021-05-01 06:40:41,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-05-01 06:40:41,563 INFO L142 QuantifierPusher]: treesize reduction 47, result has 51.5 percent of original size [2021-05-01 06:40:41,564 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-01 06:40:41,591 INFO L142 QuantifierPusher]: treesize reduction 47, result has 52.0 percent of original size [2021-05-01 06:40:41,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-05-01 06:40:41,618 INFO L142 QuantifierPusher]: treesize reduction 37, result has 61.5 percent of original size [2021-05-01 06:40:41,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-05-01 06:40:41,648 INFO L142 QuantifierPusher]: treesize reduction 44, result has 43.6 percent of original size [2021-05-01 06:40:41,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:41,672 INFO L142 QuantifierPusher]: treesize reduction 46, result has 43.2 percent of original size [2021-05-01 06:40:41,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:41,696 INFO L142 QuantifierPusher]: treesize reduction 40, result has 69.9 percent of original size [2021-05-01 06:40:41,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-05-01 06:40:41,749 INFO L142 QuantifierPusher]: treesize reduction 40, result has 69.5 percent of original size [2021-05-01 06:40:41,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-05-01 06:40:41,801 INFO L142 QuantifierPusher]: treesize reduction 20, result has 60.8 percent of original size [2021-05-01 06:40:41,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:41,822 INFO L142 QuantifierPusher]: treesize reduction 18, result has 63.3 percent of original size [2021-05-01 06:40:41,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:41,844 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:40:41,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:41,867 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:41,867 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:41,888 INFO L142 QuantifierPusher]: treesize reduction 22, result has 56.9 percent of original size [2021-05-01 06:40:41,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:41,915 INFO L142 QuantifierPusher]: treesize reduction 9, result has 72.7 percent of original size [2021-05-01 06:40:41,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:41,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:41,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:41,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:41,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:41,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:42,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:42,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:42,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-01 06:40:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:42,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:42,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:42,021 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 06:40:42,021 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:42,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390381810] [2021-05-01 06:40:42,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390381810] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:42,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:42,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-01 06:40:42,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943072637] [2021-05-01 06:40:42,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-01 06:40:42,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-01 06:40:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-01 06:40:42,022 INFO L87 Difference]: Start difference. First operand 522 states and 627 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 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 06:40:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:44,007 INFO L93 Difference]: Finished difference Result 795 states and 960 transitions. [2021-05-01 06:40:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-01 06:40:44,008 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 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 62 [2021-05-01 06:40:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:44,010 INFO L225 Difference]: With dead ends: 795 [2021-05-01 06:40:44,010 INFO L226 Difference]: Without dead ends: 793 [2021-05-01 06:40:44,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1364.4ms TimeCoverageRelationStatistics Valid=441, Invalid=2981, Unknown=0, NotChecked=0, Total=3422 [2021-05-01 06:40:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-05-01 06:40:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 528. [2021-05-01 06:40:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 500 states have (on average 1.198) internal successors, (599), 510 states have internal predecessors, (599), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-01 06:40:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 634 transitions. [2021-05-01 06:40:44,171 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 634 transitions. Word has length 62 [2021-05-01 06:40:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:44,171 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 634 transitions. [2021-05-01 06:40:44,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 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 06:40:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 634 transitions. [2021-05-01 06:40:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-01 06:40:44,172 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:44,172 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:44,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-01 06:40:44,173 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2021-05-01 06:40:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041686593] [2021-05-01 06:40:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:44,177 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:44,177 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:44,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:44,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:44,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:44,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:44,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:44,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:44,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 06:40:44,236 INFO L142 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-05-01 06:40:44,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 06:40:44,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:44,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,260 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:44,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:44,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:44,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:44,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 06:40:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:44,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:44,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-01 06:40:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:44,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:44,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-01 06:40:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:44,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:44,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:44,338 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 06:40:44,338 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041686593] [2021-05-01 06:40:44,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1041686593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:44,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:44,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-01 06:40:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787676657] [2021-05-01 06:40:44,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-01 06:40:44,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:44,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-01 06:40:44,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-01 06:40:44,339 INFO L87 Difference]: Start difference. First operand 528 states and 634 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 06:40:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:44,958 INFO L93 Difference]: Finished difference Result 714 states and 860 transitions. [2021-05-01 06:40:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-01 06:40:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2021-05-01 06:40:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:44,960 INFO L225 Difference]: With dead ends: 714 [2021-05-01 06:40:44,960 INFO L226 Difference]: Without dead ends: 657 [2021-05-01 06:40:44,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-01 06:40:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-05-01 06:40:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 485. [2021-05-01 06:40:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 459 states have (on average 1.187363834422658) internal successors, (545), 468 states have internal predecessors, (545), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-01 06:40:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 579 transitions. [2021-05-01 06:40:45,119 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 579 transitions. Word has length 65 [2021-05-01 06:40:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:45,119 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 579 transitions. [2021-05-01 06:40:45,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 06:40:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 579 transitions. [2021-05-01 06:40:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-01 06:40:45,120 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:45,120 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 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] [2021-05-01 06:40:45,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-01 06:40:45,120 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2021-05-01 06:40:45,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:45,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055884467] [2021-05-01 06:40:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:45,132 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:45,132 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:45,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:45,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:45,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:45,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:45,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:45,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:45,194 INFO L142 QuantifierPusher]: treesize reduction 16, result has 68.0 percent of original size [2021-05-01 06:40:45,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:45,207 INFO L142 QuantifierPusher]: treesize reduction 16, result has 68.0 percent of original size [2021-05-01 06:40:45,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:45,208 INFO L142 QuantifierPusher]: treesize reduction 22, result has 60.7 percent of original size [2021-05-01 06:40:45,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:45,222 INFO L142 QuantifierPusher]: treesize reduction 22, result has 54.2 percent of original size [2021-05-01 06:40:45,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:40:45,227 INFO L142 QuantifierPusher]: treesize reduction 16, result has 42.9 percent of original size [2021-05-01 06:40:45,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:45,234 INFO L142 QuantifierPusher]: treesize reduction 16, result has 15.8 percent of original size [2021-05-01 06:40:45,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:45,240 INFO L142 QuantifierPusher]: treesize reduction 17, result has 29.2 percent of original size [2021-05-01 06:40:45,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:45,244 INFO L142 QuantifierPusher]: treesize reduction 50, result has 51.0 percent of original size [2021-05-01 06:40:45,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:45,263 INFO L142 QuantifierPusher]: treesize reduction 57, result has 53.3 percent of original size [2021-05-01 06:40:45,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 06:40:45,303 INFO L142 QuantifierPusher]: treesize reduction 57, result has 56.8 percent of original size [2021-05-01 06:40:45,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-05-01 06:40:45,347 INFO L142 QuantifierPusher]: treesize reduction 57, result has 55.8 percent of original size [2021-05-01 06:40:45,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-05-01 06:40:45,386 INFO L142 QuantifierPusher]: treesize reduction 31, result has 59.2 percent of original size [2021-05-01 06:40:45,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:40:45,409 INFO L142 QuantifierPusher]: treesize reduction 57, result has 49.6 percent of original size [2021-05-01 06:40:45,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:40:45,440 INFO L142 QuantifierPusher]: treesize reduction 44, result has 58.9 percent of original size [2021-05-01 06:40:45,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-05-01 06:40:45,474 INFO L142 QuantifierPusher]: treesize reduction 44, result has 51.6 percent of original size [2021-05-01 06:40:45,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:45,486 INFO L142 QuantifierPusher]: treesize reduction 45, result has 51.1 percent of original size [2021-05-01 06:40:45,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:45,523 INFO L142 QuantifierPusher]: treesize reduction 44, result has 51.6 percent of original size [2021-05-01 06:40:45,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:40:45,554 INFO L142 QuantifierPusher]: treesize reduction 39, result has 57.1 percent of original size [2021-05-01 06:40:45,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:45,588 INFO L142 QuantifierPusher]: treesize reduction 33, result has 62.5 percent of original size [2021-05-01 06:40:45,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-05-01 06:40:45,626 INFO L142 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size [2021-05-01 06:40:45,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:45,628 INFO L142 QuantifierPusher]: treesize reduction 29, result has 53.2 percent of original size [2021-05-01 06:40:45,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:45,656 INFO L142 QuantifierPusher]: treesize reduction 53, result has 56.2 percent of original size [2021-05-01 06:40:45,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-05-01 06:40:45,701 INFO L142 QuantifierPusher]: treesize reduction 43, result has 67.2 percent of original size [2021-05-01 06:40:45,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-05-01 06:40:45,745 INFO L142 QuantifierPusher]: treesize reduction 45, result has 65.1 percent of original size [2021-05-01 06:40:45,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-05-01 06:40:45,784 INFO L142 QuantifierPusher]: treesize reduction 45, result has 60.5 percent of original size [2021-05-01 06:40:45,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-05-01 06:40:45,821 INFO L142 QuantifierPusher]: treesize reduction 8, result has 83.0 percent of original size [2021-05-01 06:40:45,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:40:45,848 INFO L142 QuantifierPusher]: treesize reduction 8, result has 82.2 percent of original size [2021-05-01 06:40:45,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:45,876 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:40:45,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:45,902 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:45,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:45,927 INFO L142 QuantifierPusher]: treesize reduction 22, result has 56.9 percent of original size [2021-05-01 06:40:45,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-01 06:40:45,958 INFO L142 QuantifierPusher]: treesize reduction 9, result has 72.7 percent of original size [2021-05-01 06:40:45,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-01 06:40:45,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:45,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:46,002 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:46,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:46,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:46,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:46,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:46,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:46,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:46,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:46,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:46,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-05-01 06:40:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:46,082 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:46,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:46,083 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 06:40:46,083 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:46,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055884467] [2021-05-01 06:40:46,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055884467] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:46,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:46,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-01 06:40:46,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682531512] [2021-05-01 06:40:46,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-01 06:40:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-01 06:40:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-01 06:40:46,084 INFO L87 Difference]: Start difference. First operand 485 states and 579 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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 06:40:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:51,786 INFO L93 Difference]: Finished difference Result 1012 states and 1229 transitions. [2021-05-01 06:40:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-01 06:40:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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 64 [2021-05-01 06:40:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:51,789 INFO L225 Difference]: With dead ends: 1012 [2021-05-01 06:40:51,789 INFO L226 Difference]: Without dead ends: 898 [2021-05-01 06:40:51,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 4414.1ms TimeCoverageRelationStatistics Valid=1467, Invalid=10305, Unknown=0, NotChecked=0, Total=11772 [2021-05-01 06:40:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-05-01 06:40:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 637. [2021-05-01 06:40:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 604 states have (on average 1.1887417218543046) internal successors, (718), 617 states have internal predecessors, (718), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-01 06:40:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 764 transitions. [2021-05-01 06:40:52,008 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 764 transitions. Word has length 64 [2021-05-01 06:40:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:52,008 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 764 transitions. [2021-05-01 06:40:52,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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 06:40:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 764 transitions. [2021-05-01 06:40:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-01 06:40:52,010 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:52,010 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:52,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-01 06:40:52,010 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:52,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1602966465, now seen corresponding path program 7 times [2021-05-01 06:40:52,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:52,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982017199] [2021-05-01 06:40:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:52,021 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:52,022 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:52,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:52,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:52,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:52,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:52,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:52,085 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:52,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:52,089 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-05-01 06:40:52,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:40:52,094 INFO L142 QuantifierPusher]: treesize reduction 27, result has 59.7 percent of original size [2021-05-01 06:40:52,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:52,109 INFO L142 QuantifierPusher]: treesize reduction 29, result has 65.1 percent of original size [2021-05-01 06:40:52,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-01 06:40:52,131 INFO L142 QuantifierPusher]: treesize reduction 29, result has 69.8 percent of original size [2021-05-01 06:40:52,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-05-01 06:40:52,165 INFO L142 QuantifierPusher]: treesize reduction 29, result has 69.1 percent of original size [2021-05-01 06:40:52,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 06:40:52,193 INFO L142 QuantifierPusher]: treesize reduction 45, result has 47.1 percent of original size [2021-05-01 06:40:52,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:52,220 INFO L142 QuantifierPusher]: treesize reduction 10, result has 79.2 percent of original size [2021-05-01 06:40:52,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:52,241 INFO L142 QuantifierPusher]: treesize reduction 9, result has 78.6 percent of original size [2021-05-01 06:40:52,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:40:52,257 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:52,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:52,271 INFO L142 QuantifierPusher]: treesize reduction 11, result has 64.5 percent of original size [2021-05-01 06:40:52,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:52,296 INFO L142 QuantifierPusher]: treesize reduction 10, result has 71.4 percent of original size [2021-05-01 06:40:52,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 06:40:52,317 INFO L142 QuantifierPusher]: treesize reduction 26, result has 68.3 percent of original size [2021-05-01 06:40:52,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:40:52,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:52,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:52,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:52,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:52,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:52,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:52,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-01 06:40:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:52,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:52,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-01 06:40:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:52,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:52,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:52,419 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 06:40:52,420 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:52,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982017199] [2021-05-01 06:40:52,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1982017199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:52,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:52,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-01 06:40:52,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105259497] [2021-05-01 06:40:52,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-01 06:40:52,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-01 06:40:52,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-01 06:40:52,421 INFO L87 Difference]: Start difference. First operand 637 states and 764 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 06:40:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:53,323 INFO L93 Difference]: Finished difference Result 707 states and 850 transitions. [2021-05-01 06:40:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-01 06:40:53,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 65 [2021-05-01 06:40:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:53,326 INFO L225 Difference]: With dead ends: 707 [2021-05-01 06:40:53,326 INFO L226 Difference]: Without dead ends: 705 [2021-05-01 06:40:53,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-05-01 06:40:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-05-01 06:40:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 661. [2021-05-01 06:40:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 621 states have (on average 1.183574879227053) internal successors, (735), 637 states have internal predecessors, (735), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (28), 13 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-01 06:40:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 793 transitions. [2021-05-01 06:40:53,554 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 793 transitions. Word has length 65 [2021-05-01 06:40:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:53,554 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 793 transitions. [2021-05-01 06:40:53,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 06:40:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 793 transitions. [2021-05-01 06:40:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-01 06:40:53,555 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:53,555 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:53,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-01 06:40:53,556 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:53,556 INFO L82 PathProgramCache]: Analyzing trace with hash 873252058, now seen corresponding path program 4 times [2021-05-01 06:40:53,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:53,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204211325] [2021-05-01 06:40:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:53,560 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:53,561 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:53,599 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:53,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:53,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:53,600 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:53,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:53,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:53,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:53,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:53,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:53,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:53,622 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:53,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:53,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:53,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:53,626 INFO L142 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-05-01 06:40:53,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:40:53,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:53,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:53,643 INFO L142 QuantifierPusher]: treesize reduction 49, result has 16.9 percent of original size [2021-05-01 06:40:53,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:53,653 INFO L142 QuantifierPusher]: treesize reduction 52, result has 41.6 percent of original size [2021-05-01 06:40:53,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:40:53,683 INFO L142 QuantifierPusher]: treesize reduction 70, result has 46.2 percent of original size [2021-05-01 06:40:53,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-05-01 06:40:53,721 INFO L142 QuantifierPusher]: treesize reduction 70, result has 52.4 percent of original size [2021-05-01 06:40:53,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-05-01 06:40:53,772 INFO L142 QuantifierPusher]: treesize reduction 70, result has 51.0 percent of original size [2021-05-01 06:40:53,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-05-01 06:40:53,815 INFO L142 QuantifierPusher]: treesize reduction 95, result has 37.9 percent of original size [2021-05-01 06:40:53,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-05-01 06:40:53,850 INFO L142 QuantifierPusher]: treesize reduction 81, result has 46.4 percent of original size [2021-05-01 06:40:53,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-05-01 06:40:53,890 INFO L142 QuantifierPusher]: treesize reduction 49, result has 45.6 percent of original size [2021-05-01 06:40:53,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 06:40:53,919 INFO L142 QuantifierPusher]: treesize reduction 9, result has 75.7 percent of original size [2021-05-01 06:40:53,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:53,939 INFO L142 QuantifierPusher]: treesize reduction 36, result has 61.7 percent of original size [2021-05-01 06:40:53,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-05-01 06:40:53,966 INFO L142 QuantifierPusher]: treesize reduction 36, result has 59.1 percent of original size [2021-05-01 06:40:53,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:40:53,999 INFO L142 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-05-01 06:40:54,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-01 06:40:54,028 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:40:54,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:40:54,057 INFO L142 QuantifierPusher]: treesize reduction 9, result has 35.7 percent of original size [2021-05-01 06:40:54,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:54,075 INFO L142 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-05-01 06:40:54,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:54,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:54,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:54,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:54,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:54,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:54,108 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 06:40:54,108 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:54,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204211325] [2021-05-01 06:40:54,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204211325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:54,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:54,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-01 06:40:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384184386] [2021-05-01 06:40:54,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-01 06:40:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:54,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-01 06:40:54,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-01 06:40:54,109 INFO L87 Difference]: Start difference. First operand 661 states and 793 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 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 06:40:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:55,643 INFO L93 Difference]: Finished difference Result 830 states and 1003 transitions. [2021-05-01 06:40:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-01 06:40:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 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 64 [2021-05-01 06:40:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:55,646 INFO L225 Difference]: With dead ends: 830 [2021-05-01 06:40:55,646 INFO L226 Difference]: Without dead ends: 716 [2021-05-01 06:40:55,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1130.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-05-01 06:40:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-05-01 06:40:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 677. [2021-05-01 06:40:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 637 states have (on average 1.1821036106750393) internal successors, (753), 653 states have internal predecessors, (753), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (28), 13 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-01 06:40:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 811 transitions. [2021-05-01 06:40:55,873 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 811 transitions. Word has length 64 [2021-05-01 06:40:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:55,873 INFO L480 AbstractCegarLoop]: Abstraction has 677 states and 811 transitions. [2021-05-01 06:40:55,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 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 06:40:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 811 transitions. [2021-05-01 06:40:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-01 06:40:55,875 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:55,875 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:55,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-01 06:40:55,875 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:55,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1868426852, now seen corresponding path program 6 times [2021-05-01 06:40:55,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:55,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417424035] [2021-05-01 06:40:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:55,886 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:55,887 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:55,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:55,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:55,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:55,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:55,939 INFO L142 QuantifierPusher]: treesize reduction 16, result has 38.5 percent of original size [2021-05-01 06:40:55,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:55,945 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:40:55,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:55,952 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:40:55,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:55,960 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-05-01 06:40:55,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:55,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:55,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:55,974 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:55,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:55,978 INFO L142 QuantifierPusher]: treesize reduction 19, result has 50.0 percent of original size [2021-05-01 06:40:55,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:55,991 INFO L142 QuantifierPusher]: treesize reduction 19, result has 45.7 percent of original size [2021-05-01 06:40:55,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-05-01 06:40:56,005 INFO L142 QuantifierPusher]: treesize reduction 21, result has 36.4 percent of original size [2021-05-01 06:40:56,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 06:40:56,018 INFO L142 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-05-01 06:40:56,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:56,022 INFO L142 QuantifierPusher]: treesize reduction 15, result has 31.8 percent of original size [2021-05-01 06:40:56,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:56,036 INFO L142 QuantifierPusher]: treesize reduction 15, result has 31.8 percent of original size [2021-05-01 06:40:56,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:56,050 INFO L142 QuantifierPusher]: treesize reduction 16, result has 46.7 percent of original size [2021-05-01 06:40:56,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 06:40:56,069 INFO L142 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-05-01 06:40:56,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:56,088 INFO L142 QuantifierPusher]: treesize reduction 20, result has 47.4 percent of original size [2021-05-01 06:40:56,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:56,112 INFO L142 QuantifierPusher]: treesize reduction 20, result has 60.8 percent of original size [2021-05-01 06:40:56,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:56,144 INFO L142 QuantifierPusher]: treesize reduction 20, result has 58.3 percent of original size [2021-05-01 06:40:56,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:56,171 INFO L142 QuantifierPusher]: treesize reduction 20, result has 63.0 percent of original size [2021-05-01 06:40:56,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:56,202 INFO L142 QuantifierPusher]: treesize reduction 26, result has 73.2 percent of original size [2021-05-01 06:40:56,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-05-01 06:40:56,257 INFO L142 QuantifierPusher]: treesize reduction 24, result has 78.0 percent of original size [2021-05-01 06:40:56,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-05-01 06:40:56,306 INFO L142 QuantifierPusher]: treesize reduction 26, result has 75.9 percent of original size [2021-05-01 06:40:56,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-05-01 06:40:56,350 INFO L142 QuantifierPusher]: treesize reduction 20, result has 60.8 percent of original size [2021-05-01 06:40:56,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:56,380 INFO L142 QuantifierPusher]: treesize reduction 20, result has 60.0 percent of original size [2021-05-01 06:40:56,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-05-01 06:40:56,409 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:40:56,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:40:56,433 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:40:56,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:56,454 INFO L142 QuantifierPusher]: treesize reduction 42, result has 47.5 percent of original size [2021-05-01 06:40:56,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:40:56,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:56,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:56,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:56,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:56,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:56,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:40:56,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:56,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:56,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:56,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:56,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:56,572 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 06:40:56,572 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417424035] [2021-05-01 06:40:56,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417424035] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:56,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:56,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-01 06:40:56,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871999302] [2021-05-01 06:40:56,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-01 06:40:56,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-01 06:40:56,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-05-01 06:40:56,573 INFO L87 Difference]: Start difference. First operand 677 states and 811 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 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 06:40:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:59,357 INFO L93 Difference]: Finished difference Result 947 states and 1137 transitions. [2021-05-01 06:40:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-01 06:40:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 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 64 [2021-05-01 06:40:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:59,360 INFO L225 Difference]: With dead ends: 947 [2021-05-01 06:40:59,360 INFO L226 Difference]: Without dead ends: 945 [2021-05-01 06:40:59,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1876.1ms TimeCoverageRelationStatistics Valid=776, Invalid=4924, Unknown=0, NotChecked=0, Total=5700 [2021-05-01 06:40:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-05-01 06:40:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 697. [2021-05-01 06:40:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 653 states have (on average 1.1807044410413476) internal successors, (771), 671 states have internal predecessors, (771), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 13 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-01 06:40:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 833 transitions. [2021-05-01 06:40:59,597 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 833 transitions. Word has length 64 [2021-05-01 06:40:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:59,597 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 833 transitions. [2021-05-01 06:40:59,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 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 06:40:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 833 transitions. [2021-05-01 06:40:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-01 06:40:59,598 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:59,598 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:59,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-01 06:40:59,599 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash 998054042, now seen corresponding path program 7 times [2021-05-01 06:40:59,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:59,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059718452] [2021-05-01 06:40:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:59,611 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:40:59,613 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:59,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:59,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:59,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:59,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:59,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:59,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:40:59,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:59,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:59,676 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:40:59,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:59,679 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-05-01 06:40:59,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:59,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:59,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:40:59,709 INFO L142 QuantifierPusher]: treesize reduction 4, result has 81.8 percent of original size [2021-05-01 06:40:59,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:59,726 INFO L142 QuantifierPusher]: treesize reduction 4, result has 77.8 percent of original size [2021-05-01 06:40:59,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 06:40:59,733 INFO L142 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-05-01 06:40:59,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:40:59,749 INFO L142 QuantifierPusher]: treesize reduction 8, result has 69.2 percent of original size [2021-05-01 06:40:59,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:40:59,769 INFO L142 QuantifierPusher]: treesize reduction 8, result has 79.5 percent of original size [2021-05-01 06:40:59,769 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 06:40:59,795 INFO L142 QuantifierPusher]: treesize reduction 8, result has 77.8 percent of original size [2021-05-01 06:40:59,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 06:40:59,817 INFO L142 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-05-01 06:40:59,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:40:59,842 INFO L142 QuantifierPusher]: treesize reduction 42, result has 48.8 percent of original size [2021-05-01 06:40:59,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:59,871 INFO L142 QuantifierPusher]: treesize reduction 19, result has 81.0 percent of original size [2021-05-01 06:40:59,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-05-01 06:40:59,920 INFO L142 QuantifierPusher]: treesize reduction 19, result has 80.6 percent of original size [2021-05-01 06:40:59,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-05-01 06:40:59,970 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:59,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:40:59,998 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:40:59,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:41:00,027 INFO L142 QuantifierPusher]: treesize reduction 10, result has 84.8 percent of original size [2021-05-01 06:41:00,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:41:00,061 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:41:00,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:41:00,062 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:41:00,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:41:00,094 INFO L142 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-05-01 06:41:00,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:41:00,124 INFO L142 QuantifierPusher]: treesize reduction 9, result has 79.5 percent of original size [2021-05-01 06:41:00,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 06:41:00,150 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:41:00,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:41:00,172 INFO L142 QuantifierPusher]: treesize reduction 32, result has 54.3 percent of original size [2021-05-01 06:41:00,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:41:00,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:00,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:41:00,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:00,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:41:00,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:00,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:41:00,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:00,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:00,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:41:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:41:00,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:00,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:00,290 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 06:41:00,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:41:00,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059718452] [2021-05-01 06:41:00,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059718452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:41:00,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:41:00,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-01 06:41:00,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917329968] [2021-05-01 06:41:00,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-01 06:41:00,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:41:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-01 06:41:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-05-01 06:41:00,291 INFO L87 Difference]: Start difference. First operand 697 states and 833 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 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 06:41:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:41:02,455 INFO L93 Difference]: Finished difference Result 1073 states and 1283 transitions. [2021-05-01 06:41:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-01 06:41:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 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 64 [2021-05-01 06:41:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:41:02,459 INFO L225 Difference]: With dead ends: 1073 [2021-05-01 06:41:02,459 INFO L226 Difference]: Without dead ends: 936 [2021-05-01 06:41:02,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1588.3ms TimeCoverageRelationStatistics Valid=522, Invalid=3018, Unknown=0, NotChecked=0, Total=3540 [2021-05-01 06:41:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-05-01 06:41:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 826. [2021-05-01 06:41:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 774 states have (on average 1.1795865633074936) internal successors, (913), 797 states have internal predecessors, (913), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-01 06:41:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 985 transitions. [2021-05-01 06:41:02,757 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 985 transitions. Word has length 64 [2021-05-01 06:41:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:41:02,757 INFO L480 AbstractCegarLoop]: Abstraction has 826 states and 985 transitions. [2021-05-01 06:41:02,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 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 06:41:02,757 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 985 transitions. [2021-05-01 06:41:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-01 06:41:02,758 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:41:02,758 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:41:02,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-01 06:41:02,758 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:41:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:41:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1363947086, now seen corresponding path program 8 times [2021-05-01 06:41:02,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:41:02,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305282014] [2021-05-01 06:41:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:41:02,763 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:41:02,763 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:41:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:41:02,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:02,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:02,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:02,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:41:02,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:02,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:41:02,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:02,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:41:02,823 INFO L142 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-05-01 06:41:02,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:41:02,826 INFO L142 QuantifierPusher]: treesize reduction 10, result has 64.3 percent of original size [2021-05-01 06:41:02,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 06:41:02,836 INFO L142 QuantifierPusher]: treesize reduction 12, result has 69.2 percent of original size [2021-05-01 06:41:02,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-01 06:41:02,855 INFO L142 QuantifierPusher]: treesize reduction 12, result has 76.5 percent of original size [2021-05-01 06:41:02,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-01 06:41:02,880 INFO L142 QuantifierPusher]: treesize reduction 12, result has 75.0 percent of original size [2021-05-01 06:41:02,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 06:41:02,902 INFO L142 QuantifierPusher]: treesize reduction 12, result has 75.5 percent of original size [2021-05-01 06:41:02,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-01 06:41:02,924 INFO L142 QuantifierPusher]: treesize reduction 36, result has 52.6 percent of original size [2021-05-01 06:41:02,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:41:02,951 INFO L142 QuantifierPusher]: treesize reduction 15, result has 84.5 percent of original size [2021-05-01 06:41:02,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-05-01 06:41:02,994 INFO L142 QuantifierPusher]: treesize reduction 17, result has 82.3 percent of original size [2021-05-01 06:41:02,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-05-01 06:41:03,029 INFO L142 QuantifierPusher]: treesize reduction 15, result has 72.7 percent of original size [2021-05-01 06:41:03,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-01 06:41:03,054 INFO L142 QuantifierPusher]: treesize reduction 15, result has 81.0 percent of original size [2021-05-01 06:41:03,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-05-01 06:41:03,082 INFO L142 QuantifierPusher]: treesize reduction 14, result has 84.4 percent of original size [2021-05-01 06:41:03,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-05-01 06:41:03,126 INFO L142 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-05-01 06:41:03,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:41:03,136 INFO L142 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-05-01 06:41:03,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:41:03,164 INFO L142 QuantifierPusher]: treesize reduction 10, result has 85.9 percent of original size [2021-05-01 06:41:03,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-05-01 06:41:03,197 INFO L142 QuantifierPusher]: treesize reduction 10, result has 81.8 percent of original size [2021-05-01 06:41:03,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:41:03,208 INFO L142 QuantifierPusher]: treesize reduction 10, result has 81.8 percent of original size [2021-05-01 06:41:03,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:41:03,238 INFO L142 QuantifierPusher]: treesize reduction 10, result has 81.8 percent of original size [2021-05-01 06:41:03,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:41:03,267 INFO L142 QuantifierPusher]: treesize reduction 10, result has 81.8 percent of original size [2021-05-01 06:41:03,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:41:03,297 INFO L142 QuantifierPusher]: treesize reduction 15, result has 75.0 percent of original size [2021-05-01 06:41:03,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 06:41:03,323 INFO L142 QuantifierPusher]: treesize reduction 13, result has 72.3 percent of original size [2021-05-01 06:41:03,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-01 06:41:03,343 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-05-01 06:41:03,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 06:41:03,361 INFO L142 QuantifierPusher]: treesize reduction 17, result has 69.1 percent of original size [2021-05-01 06:41:03,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 06:41:03,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:03,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:41:03,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:03,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:41:03,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:03,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:41:03,431 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:03,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:03,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:41:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:41:03,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:03,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:03,476 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 06:41:03,476 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:41:03,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305282014] [2021-05-01 06:41:03,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [305282014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:41:03,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:41:03,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-01 06:41:03,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40321917] [2021-05-01 06:41:03,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-01 06:41:03,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:41:03,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-01 06:41:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-05-01 06:41:03,477 INFO L87 Difference]: Start difference. First operand 826 states and 985 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 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 06:41:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:41:05,458 INFO L93 Difference]: Finished difference Result 1212 states and 1454 transitions. [2021-05-01 06:41:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-01 06:41:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 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 64 [2021-05-01 06:41:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:41:05,461 INFO L225 Difference]: With dead ends: 1212 [2021-05-01 06:41:05,461 INFO L226 Difference]: Without dead ends: 1040 [2021-05-01 06:41:05,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1505.7ms TimeCoverageRelationStatistics Valid=671, Invalid=2635, Unknown=0, NotChecked=0, Total=3306 [2021-05-01 06:41:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-05-01 06:41:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 852. [2021-05-01 06:41:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 800 states have (on average 1.185) internal successors, (948), 823 states have internal predecessors, (948), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-01 06:41:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1020 transitions. [2021-05-01 06:41:05,769 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1020 transitions. Word has length 64 [2021-05-01 06:41:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:41:05,770 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1020 transitions. [2021-05-01 06:41:05,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 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 06:41:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1020 transitions. [2021-05-01 06:41:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-01 06:41:05,771 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:41:05,771 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:41:05,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-01 06:41:05,771 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:41:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:41:05,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1148832980, now seen corresponding path program 9 times [2021-05-01 06:41:05,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:41:05,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206719851] [2021-05-01 06:41:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:41:05,784 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:41:05,785 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:41:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:41:05,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:05,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:05,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:05,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:41:05,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:05,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:41:05,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:05,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-01 06:41:05,841 INFO L142 QuantifierPusher]: treesize reduction 19, result has 71.2 percent of original size [2021-05-01 06:41:05,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-05-01 06:41:05,860 INFO L142 QuantifierPusher]: treesize reduction 10, result has 66.7 percent of original size [2021-05-01 06:41:05,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 06:41:05,871 INFO L142 QuantifierPusher]: treesize reduction 12, result has 65.7 percent of original size [2021-05-01 06:41:05,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 06:41:05,876 INFO L142 QuantifierPusher]: treesize reduction 23, result has 58.9 percent of original size [2021-05-01 06:41:05,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 06:41:05,882 INFO L142 QuantifierPusher]: treesize reduction 29, result has 34.1 percent of original size [2021-05-01 06:41:05,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 06:41:05,888 INFO L142 QuantifierPusher]: treesize reduction 48, result has 54.3 percent of original size [2021-05-01 06:41:05,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-05-01 06:41:05,897 INFO L142 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size [2021-05-01 06:41:05,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-05-01 06:41:05,938 INFO L142 QuantifierPusher]: treesize reduction 41, result has 63.4 percent of original size [2021-05-01 06:41:05,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-05-01 06:41:05,972 INFO L142 QuantifierPusher]: treesize reduction 43, result has 62.3 percent of original size [2021-05-01 06:41:05,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-05-01 06:41:06,005 INFO L142 QuantifierPusher]: treesize reduction 26, result has 73.2 percent of original size [2021-05-01 06:41:06,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-05-01 06:41:06,035 INFO L142 QuantifierPusher]: treesize reduction 10, result has 72.2 percent of original size [2021-05-01 06:41:06,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 06:41:06,050 INFO L142 QuantifierPusher]: treesize reduction 26, result has 68.3 percent of original size [2021-05-01 06:41:06,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-05-01 06:41:06,080 INFO L142 QuantifierPusher]: treesize reduction 26, result has 66.7 percent of original size [2021-05-01 06:41:06,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 06:41:06,108 INFO L142 QuantifierPusher]: treesize reduction 26, result has 65.8 percent of original size [2021-05-01 06:41:06,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-01 06:41:06,133 INFO L142 QuantifierPusher]: treesize reduction 9, result has 65.4 percent of original size [2021-05-01 06:41:06,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 06:41:06,153 INFO L142 QuantifierPusher]: treesize reduction 9, result has 35.7 percent of original size [2021-05-01 06:41:06,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:41:06,168 INFO L142 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-05-01 06:41:06,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:06,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:06,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:06,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:41:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:41:06,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:41:06,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:41:06,205 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 06:41:06,205 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:41:06,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206719851] [2021-05-01 06:41:06,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [206719851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:41:06,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:41:06,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-01 06:41:06,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727567259] [2021-05-01 06:41:06,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-01 06:41:06,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:41:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-01 06:41:06,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-01 06:41:06,206 INFO L87 Difference]: Start difference. First operand 852 states and 1020 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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 06:41:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:41:07,212 INFO L93 Difference]: Finished difference Result 1174 states and 1416 transitions. [2021-05-01 06:41:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-01 06:41:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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 64 [2021-05-01 06:41:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:41:07,215 INFO L225 Difference]: With dead ends: 1174 [2021-05-01 06:41:07,215 INFO L226 Difference]: Without dead ends: 939 [2021-05-01 06:41:07,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-05-01 06:41:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-05-01 06:41:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 880. [2021-05-01 06:41:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 828 states have (on average 1.182367149758454) internal successors, (979), 851 states have internal predecessors, (979), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-01 06:41:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1051 transitions. [2021-05-01 06:41:07,548 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1051 transitions. Word has length 64 [2021-05-01 06:41:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:41:07,549 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 1051 transitions. [2021-05-01 06:41:07,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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 06:41:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1051 transitions. [2021-05-01 06:41:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-01 06:41:07,550 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:41:07,550 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:41:07,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-01 06:41:07,550 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:41:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:41:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -777241936, now seen corresponding path program 2 times [2021-05-01 06:41:07,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:41:07,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422533148] [2021-05-01 06:41:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:41:07,554 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:41:07,555 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:41:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:41:07,571 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:41:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:41:07,589 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:41:07,611 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-01 06:41:07,611 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 06:41:07,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-01 06:41:07,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 06:41:07 BoogieIcfgContainer [2021-05-01 06:41:07,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 06:41:07,625 INFO L168 Benchmark]: Toolchain (without parser) took 74592.44 ms. Allocated memory was 182.5 MB in the beginning and 413.1 MB in the end (delta: 230.7 MB). Free memory was 148.8 MB in the beginning and 150.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 229.2 MB. Max. memory is 8.0 GB. [2021-05-01 06:41:07,625 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 182.5 MB. Free memory is still 165.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 06:41:07,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.76 ms. Allocated memory is still 182.5 MB. Free memory was 148.6 MB in the beginning and 138.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 06:41:07,626 INFO L168 Benchmark]: Boogie Preprocessor took 53.47 ms. Allocated memory is still 182.5 MB. Free memory was 138.7 MB in the beginning and 166.0 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-01 06:41:07,626 INFO L168 Benchmark]: RCFGBuilder took 343.95 ms. Allocated memory is still 182.5 MB. Free memory was 166.0 MB in the beginning and 149.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-01 06:41:07,626 INFO L168 Benchmark]: TraceAbstraction took 74013.92 ms. Allocated memory was 182.5 MB in the beginning and 413.1 MB in the end (delta: 230.7 MB). Free memory was 148.8 MB in the beginning and 150.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 230.3 MB. Max. memory is 8.0 GB. [2021-05-01 06:41:07,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 182.5 MB. Free memory is still 165.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 174.76 ms. Allocated memory is still 182.5 MB. Free memory was 148.6 MB in the beginning and 138.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.47 ms. Allocated memory is still 182.5 MB. Free memory was 138.7 MB in the beginning and 166.0 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 343.95 ms. Allocated memory is still 182.5 MB. Free memory was 166.0 MB in the beginning and 149.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 74013.92 ms. Allocated memory was 182.5 MB in the beginning and 413.1 MB in the end (delta: 230.7 MB). Free memory was 148.8 MB in the beginning and 150.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 230.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j