/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:58:46,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:58:46,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:58:46,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:58:46,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:58:46,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:58:46,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:58:46,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:58:46,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:58:46,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:58:46,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:58:46,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:58:46,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:58:46,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:58:46,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:58:46,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:58:46,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:58:46,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:58:46,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:58:46,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:58:46,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:58:46,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:58:46,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:58:46,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:58:46,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:58:46,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:58:46,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:58:46,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:58:46,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:58:46,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:58:46,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:58:46,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:58:46,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:58:46,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:58:46,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:58:46,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:58:46,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:58:46,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:58:46,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:58:46,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:58:46,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:58:46,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:58:46,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:58:46,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:58:46,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:58:46,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:58:46,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:58:46,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:58:46,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:58:46,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:58:46,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:58:46,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:58:46,267 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:58:46,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:58:46,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:58:46,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:46,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:58:46,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:58:46,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:58:46,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:58:46,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:58:46,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:58:46,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:58:46,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:58:46,725 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:58:46,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-11-07 01:58:46,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5467e78f0/84b5b4b4c4734cef93256ecc28128c04/FLAG9222dc077 [2020-11-07 01:58:47,502 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:58:47,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-11-07 01:58:47,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5467e78f0/84b5b4b4c4734cef93256ecc28128c04/FLAG9222dc077 [2020-11-07 01:58:47,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5467e78f0/84b5b4b4c4734cef93256ecc28128c04 [2020-11-07 01:58:47,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:58:47,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:58:47,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:47,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:58:47,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:58:47,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:47" (1/1) ... [2020-11-07 01:58:47,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1963ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:47, skipping insertion in model container [2020-11-07 01:58:47,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:47" (1/1) ... [2020-11-07 01:58:47,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:58:47,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:58:48,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:48,132 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:58:48,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:48,173 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:58:48,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48 WrapperNode [2020-11-07 01:58:48,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:48,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:58:48,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:58:48,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:58:48,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:58:48,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:58:48,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:58:48,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:58:48,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (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 [2020-11-07 01:58:48,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:58:48,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:58:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:58:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:58:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:58:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:58:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:58:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 01:58:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 01:58:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:58:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:58:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 01:58:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:58:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:58:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:58:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:58:48,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:58:48,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:58:48,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:58:48,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:58:48,889 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:58:48,890 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 01:58:48,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:48 BoogieIcfgContainer [2020-11-07 01:58:48,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:58:48,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:58:48,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:58:48,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:58:48,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:47" (1/3) ... [2020-11-07 01:58:48,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b16d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:48, skipping insertion in model container [2020-11-07 01:58:48,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (2/3) ... [2020-11-07 01:58:48,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b16d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:48, skipping insertion in model container [2020-11-07 01:58:48,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:48" (3/3) ... [2020-11-07 01:58:48,911 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-11-07 01:58:48,931 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:58:48,935 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:58:48,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:58:48,989 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:58:48,989 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:58:48,990 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:58:48,990 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:58:48,990 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:58:48,990 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:58:48,990 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:58:48,991 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:58:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-11-07 01:58:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 01:58:49,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:49,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:49,031 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash -234938568, now seen corresponding path program 1 times [2020-11-07 01:58:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:49,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728820781] [2020-11-07 01:58:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:49,150 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:49,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728820781] [2020-11-07 01:58:49,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:49,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:58:49,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85544797] [2020-11-07 01:58:49,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:58:49,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:49,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:58:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:49,507 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-11-07 01:58:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:49,704 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-11-07 01:58:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:58:49,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-07 01:58:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:49,729 INFO L225 Difference]: With dead ends: 73 [2020-11-07 01:58:49,729 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 01:58:49,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 01:58:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 01:58:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 01:58:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-07 01:58:49,821 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2020-11-07 01:58:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:49,823 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-07 01:58:49,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:58:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-07 01:58:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 01:58:49,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:49,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:49,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:58:49,827 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:49,828 INFO L82 PathProgramCache]: Analyzing trace with hash 872969255, now seen corresponding path program 1 times [2020-11-07 01:58:49,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:49,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478491737] [2020-11-07 01:58:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:49,845 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:50,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478491737] [2020-11-07 01:58:50,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:50,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:58:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760711202] [2020-11-07 01:58:50,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:58:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:50,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:58:50,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:58:50,022 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2020-11-07 01:58:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:50,167 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-11-07 01:58:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 01:58:50,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-07 01:58:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:50,171 INFO L225 Difference]: With dead ends: 67 [2020-11-07 01:58:50,172 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 01:58:50,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:58:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 01:58:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-11-07 01:58:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 01:58:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-07 01:58:50,187 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2020-11-07 01:58:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:50,187 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-07 01:58:50,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:58:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-07 01:58:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 01:58:50,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:50,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:50,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:58:50,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash -568340233, now seen corresponding path program 1 times [2020-11-07 01:58:50,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:50,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238167671] [2020-11-07 01:58:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:50,280 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:50,282 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:50,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238167671] [2020-11-07 01:58:50,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:50,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:58:50,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425257792] [2020-11-07 01:58:50,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:58:50,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:58:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:58:50,396 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 6 states. [2020-11-07 01:58:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:50,572 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-11-07 01:58:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 01:58:50,572 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-07 01:58:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:50,574 INFO L225 Difference]: With dead ends: 78 [2020-11-07 01:58:50,574 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 01:58:50,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 01:58:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-11-07 01:58:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 01:58:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-11-07 01:58:50,586 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 32 [2020-11-07 01:58:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:50,586 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-11-07 01:58:50,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:58:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-11-07 01:58:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 01:58:50,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:50,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:50,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:58:50,589 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1329424935, now seen corresponding path program 2 times [2020-11-07 01:58:50,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:50,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777931679] [2020-11-07 01:58:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:50,657 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:50,659 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:50,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777931679] [2020-11-07 01:58:50,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:50,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:58:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129201331] [2020-11-07 01:58:50,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:58:50,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:50,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:58:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:58:50,787 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 6 states. [2020-11-07 01:58:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:50,998 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-11-07 01:58:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:58:50,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-11-07 01:58:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:51,000 INFO L225 Difference]: With dead ends: 57 [2020-11-07 01:58:51,001 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 01:58:51,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 01:58:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-11-07 01:58:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 01:58:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-11-07 01:58:51,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 39 [2020-11-07 01:58:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:51,020 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-11-07 01:58:51,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:58:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-11-07 01:58:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 01:58:51,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:51,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:51,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:58:51,025 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash 821039234, now seen corresponding path program 1 times [2020-11-07 01:58:51,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:51,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990687234] [2020-11-07 01:58:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:51,098 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:51,100 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:51,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990687234] [2020-11-07 01:58:51,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:51,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:58:51,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020436294] [2020-11-07 01:58:51,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:58:51,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:51,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:58:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:51,229 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 8 states. [2020-11-07 01:58:51,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:51,443 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-11-07 01:58:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 01:58:51,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-11-07 01:58:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:51,445 INFO L225 Difference]: With dead ends: 69 [2020-11-07 01:58:51,446 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 01:58:51,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 01:58:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-11-07 01:58:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 01:58:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-11-07 01:58:51,456 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 46 [2020-11-07 01:58:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:51,457 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-11-07 01:58:51,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:58:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-11-07 01:58:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 01:58:51,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:51,459 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:51,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:58:51,459 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:51,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1394712007, now seen corresponding path program 2 times [2020-11-07 01:58:51,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:51,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142629445] [2020-11-07 01:58:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:51,529 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:51,531 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:51,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142629445] [2020-11-07 01:58:51,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:51,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:58:51,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105238401] [2020-11-07 01:58:51,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:58:51,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:51,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:58:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:51,663 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 8 states. [2020-11-07 01:58:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:51,843 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-11-07 01:58:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 01:58:51,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-11-07 01:58:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:51,845 INFO L225 Difference]: With dead ends: 95 [2020-11-07 01:58:51,845 INFO L226 Difference]: Without dead ends: 68 [2020-11-07 01:58:51,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-07 01:58:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-11-07 01:58:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 01:58:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-11-07 01:58:51,856 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2020-11-07 01:58:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:51,857 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-11-07 01:58:51,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:58:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-11-07 01:58:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 01:58:51,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:51,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:51,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:58:51,859 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash -876567913, now seen corresponding path program 3 times [2020-11-07 01:58:51,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:51,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319578099] [2020-11-07 01:58:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:51,917 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:51,918 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319578099] [2020-11-07 01:58:52,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:52,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:58:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460750387] [2020-11-07 01:58:52,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:58:52,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:58:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:58:52,034 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 10 states. [2020-11-07 01:58:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:52,251 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-11-07 01:58:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 01:58:52,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-11-07 01:58:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:52,253 INFO L225 Difference]: With dead ends: 102 [2020-11-07 01:58:52,253 INFO L226 Difference]: Without dead ends: 75 [2020-11-07 01:58:52,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:58:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-07 01:58:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-11-07 01:58:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-07 01:58:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-11-07 01:58:52,277 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 60 [2020-11-07 01:58:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:52,277 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-11-07 01:58:52,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:58:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-11-07 01:58:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 01:58:52,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:52,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:52,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:58:52,280 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 501846983, now seen corresponding path program 4 times [2020-11-07 01:58:52,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:52,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582034798] [2020-11-07 01:58:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:52,345 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:52,349 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582034798] [2020-11-07 01:58:52,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:52,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:58:52,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329647925] [2020-11-07 01:58:52,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:58:52,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:52,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:58:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:52,526 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 12 states. [2020-11-07 01:58:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:52,764 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-11-07 01:58:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 01:58:52,765 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-11-07 01:58:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:52,766 INFO L225 Difference]: With dead ends: 109 [2020-11-07 01:58:52,766 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 01:58:52,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:58:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 01:58:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-11-07 01:58:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-07 01:58:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-11-07 01:58:52,778 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 67 [2020-11-07 01:58:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:52,778 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-11-07 01:58:52,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:58:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-11-07 01:58:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-07 01:58:52,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:52,780 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:52,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:58:52,780 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash 70773911, now seen corresponding path program 5 times [2020-11-07 01:58:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:52,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132730704] [2020-11-07 01:58:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:52,836 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:52,838 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:53,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132730704] [2020-11-07 01:58:53,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:53,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 01:58:53,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210493711] [2020-11-07 01:58:53,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 01:58:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 01:58:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 01:58:53,014 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 14 states. [2020-11-07 01:58:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:53,285 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-11-07 01:58:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 01:58:53,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-11-07 01:58:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:53,287 INFO L225 Difference]: With dead ends: 116 [2020-11-07 01:58:53,287 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 01:58:53,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-07 01:58:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 01:58:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-11-07 01:58:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 01:58:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-11-07 01:58:53,299 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 74 [2020-11-07 01:58:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:53,299 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-11-07 01:58:53,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 01:58:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-11-07 01:58:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-07 01:58:53,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:53,301 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:53,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:58:53,301 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash -661976633, now seen corresponding path program 6 times [2020-11-07 01:58:53,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:53,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487604431] [2020-11-07 01:58:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:53,356 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:53,357 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:53,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487604431] [2020-11-07 01:58:53,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:53,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 01:58:53,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019338534] [2020-11-07 01:58:53,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 01:58:53,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 01:58:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:58:53,546 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 16 states. [2020-11-07 01:58:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:53,852 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-11-07 01:58:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 01:58:53,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-11-07 01:58:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:53,854 INFO L225 Difference]: With dead ends: 123 [2020-11-07 01:58:53,854 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 01:58:53,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-11-07 01:58:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 01:58:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-11-07 01:58:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 01:58:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-11-07 01:58:53,886 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 81 [2020-11-07 01:58:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:53,886 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-11-07 01:58:53,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 01:58:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-11-07 01:58:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-07 01:58:53,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:53,888 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:53,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:58:53,888 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash 220575383, now seen corresponding path program 7 times [2020-11-07 01:58:53,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:53,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356401241] [2020-11-07 01:58:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:53,958 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:53,960 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:54,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:54,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356401241] [2020-11-07 01:58:54,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:54,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 01:58:54,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356874830] [2020-11-07 01:58:54,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 01:58:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 01:58:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 01:58:54,211 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 18 states. [2020-11-07 01:58:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:54,585 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-11-07 01:58:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 01:58:54,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-11-07 01:58:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:54,592 INFO L225 Difference]: With dead ends: 130 [2020-11-07 01:58:54,592 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 01:58:54,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-11-07 01:58:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 01:58:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 01:58:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 01:58:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-11-07 01:58:54,606 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 88 [2020-11-07 01:58:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:54,607 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-11-07 01:58:54,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 01:58:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-11-07 01:58:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 01:58:54,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:54,608 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:54,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:58:54,609 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash 140902343, now seen corresponding path program 8 times [2020-11-07 01:58:54,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:54,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281099884] [2020-11-07 01:58:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:54,657 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:54,658 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:54,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:54,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281099884] [2020-11-07 01:58:54,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:54,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 01:58:54,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320579187] [2020-11-07 01:58:54,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 01:58:54,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:54,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 01:58:54,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:58:54,924 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 20 states. [2020-11-07 01:58:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:55,388 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-11-07 01:58:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 01:58:55,388 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-11-07 01:58:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:55,390 INFO L225 Difference]: With dead ends: 137 [2020-11-07 01:58:55,390 INFO L226 Difference]: Without dead ends: 110 [2020-11-07 01:58:55,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 01:58:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-07 01:58:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-11-07 01:58:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-07 01:58:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-11-07 01:58:55,407 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-11-07 01:58:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:55,408 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-11-07 01:58:55,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 01:58:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-11-07 01:58:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-07 01:58:55,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:55,410 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:55,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 01:58:55,410 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1792409449, now seen corresponding path program 9 times [2020-11-07 01:58:55,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:55,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924052386] [2020-11-07 01:58:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:55,460 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:55,462 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924052386] [2020-11-07 01:58:55,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:55,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 01:58:55,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022952158] [2020-11-07 01:58:55,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 01:58:55,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 01:58:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-07 01:58:55,818 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 22 states. [2020-11-07 01:58:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:56,268 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2020-11-07 01:58:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 01:58:56,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-11-07 01:58:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:56,270 INFO L225 Difference]: With dead ends: 144 [2020-11-07 01:58:56,270 INFO L226 Difference]: Without dead ends: 117 [2020-11-07 01:58:56,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 01:58:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-07 01:58:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-11-07 01:58:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-07 01:58:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-11-07 01:58:56,295 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 102 [2020-11-07 01:58:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:56,297 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-11-07 01:58:56,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 01:58:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-11-07 01:58:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 01:58:56,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:56,305 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:56,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 01:58:56,306 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1255830983, now seen corresponding path program 10 times [2020-11-07 01:58:56,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:56,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178649097] [2020-11-07 01:58:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:56,381 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:56,382 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:56,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178649097] [2020-11-07 01:58:56,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:56,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 01:58:56,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597490943] [2020-11-07 01:58:56,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 01:58:56,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 01:58:56,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-07 01:58:56,768 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 24 states. [2020-11-07 01:58:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:57,336 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2020-11-07 01:58:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 01:58:57,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-11-07 01:58:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:57,340 INFO L225 Difference]: With dead ends: 151 [2020-11-07 01:58:57,340 INFO L226 Difference]: Without dead ends: 124 [2020-11-07 01:58:57,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 01:58:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-07 01:58:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-11-07 01:58:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-07 01:58:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-11-07 01:58:57,366 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 109 [2020-11-07 01:58:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:57,367 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-11-07 01:58:57,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 01:58:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-11-07 01:58:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-07 01:58:57,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:57,371 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:57,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 01:58:57,371 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash 853854871, now seen corresponding path program 11 times [2020-11-07 01:58:57,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:57,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411096935] [2020-11-07 01:58:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:57,439 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:57,440 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:57,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:57,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411096935] [2020-11-07 01:58:57,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:57,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 01:58:57,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647389485] [2020-11-07 01:58:57,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 01:58:57,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 01:58:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-07 01:58:57,875 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 26 states. [2020-11-07 01:58:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:58,592 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-11-07 01:58:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 01:58:58,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-11-07 01:58:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:58,595 INFO L225 Difference]: With dead ends: 158 [2020-11-07 01:58:58,595 INFO L226 Difference]: Without dead ends: 131 [2020-11-07 01:58:58,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 01:58:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-07 01:58:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-11-07 01:58:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 01:58:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-11-07 01:58:58,613 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 116 [2020-11-07 01:58:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:58,613 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-11-07 01:58:58,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 01:58:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-11-07 01:58:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-07 01:58:58,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:58,615 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:58,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 01:58:58,615 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1430809543, now seen corresponding path program 12 times [2020-11-07 01:58:58,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:58,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849129993] [2020-11-07 01:58:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:58,676 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:58,677 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:59,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:59,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849129993] [2020-11-07 01:58:59,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:59,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 01:58:59,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114835266] [2020-11-07 01:58:59,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 01:58:59,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:59,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 01:58:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-07 01:58:59,079 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 28 states. [2020-11-07 01:58:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:59,822 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2020-11-07 01:58:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 01:58:59,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2020-11-07 01:58:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:59,825 INFO L225 Difference]: With dead ends: 165 [2020-11-07 01:58:59,825 INFO L226 Difference]: Without dead ends: 138 [2020-11-07 01:58:59,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 01:58:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-07 01:58:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-11-07 01:58:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 01:58:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2020-11-07 01:58:59,847 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 123 [2020-11-07 01:58:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:59,848 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2020-11-07 01:58:59,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 01:58:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2020-11-07 01:58:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-07 01:58:59,849 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:59,850 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:59,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 01:58:59,850 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:59,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1693848727, now seen corresponding path program 13 times [2020-11-07 01:58:59,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:59,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651074462] [2020-11-07 01:58:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:59,910 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:59,911 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:00,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651074462] [2020-11-07 01:59:00,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:00,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-11-07 01:59:00,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470781492] [2020-11-07 01:59:00,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 01:59:00,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:00,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 01:59:00,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-07 01:59:00,430 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 30 states. [2020-11-07 01:59:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:01,264 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2020-11-07 01:59:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 01:59:01,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 130 [2020-11-07 01:59:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:01,266 INFO L225 Difference]: With dead ends: 172 [2020-11-07 01:59:01,267 INFO L226 Difference]: Without dead ends: 145 [2020-11-07 01:59:01,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 01:59:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-07 01:59:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-11-07 01:59:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-07 01:59:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-11-07 01:59:01,284 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 130 [2020-11-07 01:59:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:01,284 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-11-07 01:59:01,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 01:59:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-11-07 01:59:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-07 01:59:01,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:01,286 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:01,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 01:59:01,287 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash -183508537, now seen corresponding path program 14 times [2020-11-07 01:59:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:01,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767400975] [2020-11-07 01:59:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:01,337 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:01,338 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:01,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767400975] [2020-11-07 01:59:01,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:01,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 01:59:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874557759] [2020-11-07 01:59:01,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 01:59:01,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:01,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 01:59:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-07 01:59:01,827 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 32 states. [2020-11-07 01:59:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:02,780 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2020-11-07 01:59:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 01:59:02,781 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 137 [2020-11-07 01:59:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:02,782 INFO L225 Difference]: With dead ends: 179 [2020-11-07 01:59:02,782 INFO L226 Difference]: Without dead ends: 152 [2020-11-07 01:59:02,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 01:59:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-11-07 01:59:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-11-07 01:59:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-07 01:59:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-11-07 01:59:02,800 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2020-11-07 01:59:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:02,801 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-11-07 01:59:02,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 01:59:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-11-07 01:59:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-07 01:59:02,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:02,803 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:02,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 01:59:02,803 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:02,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1845633385, now seen corresponding path program 15 times [2020-11-07 01:59:02,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:02,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024310763] [2020-11-07 01:59:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:02,854 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:02,855 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:03,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:03,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024310763] [2020-11-07 01:59:03,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:03,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 01:59:03,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577369441] [2020-11-07 01:59:03,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 01:59:03,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 01:59:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 01:59:03,397 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 34 states. [2020-11-07 01:59:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:04,506 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-11-07 01:59:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 01:59:04,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 144 [2020-11-07 01:59:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:04,510 INFO L225 Difference]: With dead ends: 186 [2020-11-07 01:59:04,510 INFO L226 Difference]: Without dead ends: 159 [2020-11-07 01:59:04,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 01:59:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-07 01:59:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-11-07 01:59:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-07 01:59:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-11-07 01:59:04,528 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 144 [2020-11-07 01:59:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:04,528 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-11-07 01:59:04,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 01:59:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-11-07 01:59:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-07 01:59:04,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:04,530 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:04,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 01:59:04,530 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 261150663, now seen corresponding path program 16 times [2020-11-07 01:59:04,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:04,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353695763] [2020-11-07 01:59:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:04,586 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:04,587 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:05,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353695763] [2020-11-07 01:59:05,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:05,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 01:59:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182159737] [2020-11-07 01:59:05,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 01:59:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 01:59:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 01:59:05,151 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 36 states. [2020-11-07 01:59:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:06,277 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-11-07 01:59:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 01:59:06,278 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 151 [2020-11-07 01:59:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:06,279 INFO L225 Difference]: With dead ends: 193 [2020-11-07 01:59:06,279 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 01:59:06,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 01:59:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 01:59:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2020-11-07 01:59:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-11-07 01:59:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2020-11-07 01:59:06,301 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 151 [2020-11-07 01:59:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:06,302 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2020-11-07 01:59:06,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 01:59:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2020-11-07 01:59:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-11-07 01:59:06,304 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:06,304 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:06,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 01:59:06,305 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:06,306 INFO L82 PathProgramCache]: Analyzing trace with hash 144451735, now seen corresponding path program 17 times [2020-11-07 01:59:06,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:06,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832333550] [2020-11-07 01:59:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:06,362 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:06,364 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:07,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:07,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832333550] [2020-11-07 01:59:07,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:07,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 01:59:07,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338313944] [2020-11-07 01:59:07,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 01:59:07,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:07,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 01:59:07,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 01:59:07,037 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 38 states. [2020-11-07 01:59:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:08,272 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2020-11-07 01:59:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 01:59:08,272 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 158 [2020-11-07 01:59:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:08,274 INFO L225 Difference]: With dead ends: 200 [2020-11-07 01:59:08,274 INFO L226 Difference]: Without dead ends: 173 [2020-11-07 01:59:08,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 01:59:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-07 01:59:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2020-11-07 01:59:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 01:59:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-11-07 01:59:08,298 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-11-07 01:59:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:08,298 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-11-07 01:59:08,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 01:59:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-11-07 01:59:08,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 01:59:08,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:08,301 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:08,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 01:59:08,301 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:08,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1574220345, now seen corresponding path program 18 times [2020-11-07 01:59:08,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:08,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76803641] [2020-11-07 01:59:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:08,364 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:08,365 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:09,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:09,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76803641] [2020-11-07 01:59:09,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:09,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 01:59:09,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729092180] [2020-11-07 01:59:09,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 01:59:09,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 01:59:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 01:59:09,089 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 40 states. [2020-11-07 01:59:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:10,454 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2020-11-07 01:59:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 01:59:10,458 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2020-11-07 01:59:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:10,459 INFO L225 Difference]: With dead ends: 207 [2020-11-07 01:59:10,459 INFO L226 Difference]: Without dead ends: 180 [2020-11-07 01:59:10,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 01:59:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-07 01:59:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2020-11-07 01:59:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-11-07 01:59:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-11-07 01:59:10,481 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 165 [2020-11-07 01:59:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:10,481 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-11-07 01:59:10,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 01:59:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-11-07 01:59:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-07 01:59:10,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:10,483 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:10,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 01:59:10,483 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash -9375081, now seen corresponding path program 19 times [2020-11-07 01:59:10,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:10,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77184852] [2020-11-07 01:59:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:10,537 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:10,538 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:11,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:11,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77184852] [2020-11-07 01:59:11,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:11,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 01:59:11,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909182741] [2020-11-07 01:59:11,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 01:59:11,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:11,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 01:59:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 01:59:11,305 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 42 states. [2020-11-07 01:59:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:12,810 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2020-11-07 01:59:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 01:59:12,811 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 172 [2020-11-07 01:59:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:12,813 INFO L225 Difference]: With dead ends: 214 [2020-11-07 01:59:12,813 INFO L226 Difference]: Without dead ends: 187 [2020-11-07 01:59:12,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 01:59:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-07 01:59:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2020-11-07 01:59:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-11-07 01:59:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-11-07 01:59:12,836 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 172 [2020-11-07 01:59:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:12,837 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-11-07 01:59:12,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 01:59:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-11-07 01:59:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 01:59:12,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:12,838 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:12,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 01:59:12,838 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1036041273, now seen corresponding path program 20 times [2020-11-07 01:59:12,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:12,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560760122] [2020-11-07 01:59:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:12,897 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:12,899 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:13,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:13,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560760122] [2020-11-07 01:59:13,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:13,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-11-07 01:59:13,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815788145] [2020-11-07 01:59:13,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 01:59:13,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 01:59:13,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 01:59:13,799 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 44 states. [2020-11-07 01:59:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:15,312 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-11-07 01:59:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 01:59:15,313 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2020-11-07 01:59:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:15,315 INFO L225 Difference]: With dead ends: 221 [2020-11-07 01:59:15,315 INFO L226 Difference]: Without dead ends: 194 [2020-11-07 01:59:15,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 01:59:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-07 01:59:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2020-11-07 01:59:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-11-07 01:59:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-11-07 01:59:15,338 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 179 [2020-11-07 01:59:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:15,338 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-11-07 01:59:15,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 01:59:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-11-07 01:59:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-11-07 01:59:15,339 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:15,339 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:15,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 01:59:15,340 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1793311593, now seen corresponding path program 21 times [2020-11-07 01:59:15,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:15,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431182039] [2020-11-07 01:59:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:15,393 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:15,394 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:16,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:16,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431182039] [2020-11-07 01:59:16,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:16,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-11-07 01:59:16,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28595063] [2020-11-07 01:59:16,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 01:59:16,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:16,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 01:59:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 01:59:16,325 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 46 states. [2020-11-07 01:59:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:17,873 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2020-11-07 01:59:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-07 01:59:17,874 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 186 [2020-11-07 01:59:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:17,876 INFO L225 Difference]: With dead ends: 228 [2020-11-07 01:59:17,876 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 01:59:17,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 01:59:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 01:59:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-11-07 01:59:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-11-07 01:59:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2020-11-07 01:59:17,903 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 186 [2020-11-07 01:59:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:17,903 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2020-11-07 01:59:17,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 01:59:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2020-11-07 01:59:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-07 01:59:17,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:17,905 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:17,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 01:59:17,905 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1658013241, now seen corresponding path program 22 times [2020-11-07 01:59:17,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:17,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323879014] [2020-11-07 01:59:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:17,962 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:17,964 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:19,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:19,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323879014] [2020-11-07 01:59:19,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:19,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-11-07 01:59:19,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441608658] [2020-11-07 01:59:19,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 01:59:19,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:19,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 01:59:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 01:59:19,047 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 48 states. [2020-11-07 01:59:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:20,992 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2020-11-07 01:59:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 01:59:20,993 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 193 [2020-11-07 01:59:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:20,995 INFO L225 Difference]: With dead ends: 235 [2020-11-07 01:59:20,995 INFO L226 Difference]: Without dead ends: 208 [2020-11-07 01:59:20,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 01:59:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-07 01:59:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2020-11-07 01:59:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 01:59:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-11-07 01:59:21,023 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 193 [2020-11-07 01:59:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:21,023 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-11-07 01:59:21,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 01:59:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-11-07 01:59:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-11-07 01:59:21,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:21,025 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:21,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 01:59:21,025 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:21,026 INFO L82 PathProgramCache]: Analyzing trace with hash -801241449, now seen corresponding path program 23 times [2020-11-07 01:59:21,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:21,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105034378] [2020-11-07 01:59:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:21,084 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:21,085 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:22,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:22,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105034378] [2020-11-07 01:59:22,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:22,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-11-07 01:59:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774027504] [2020-11-07 01:59:22,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 01:59:22,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 01:59:22,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 01:59:22,209 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 50 states. [2020-11-07 01:59:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:24,194 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2020-11-07 01:59:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-07 01:59:24,194 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 200 [2020-11-07 01:59:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:24,197 INFO L225 Difference]: With dead ends: 242 [2020-11-07 01:59:24,197 INFO L226 Difference]: Without dead ends: 215 [2020-11-07 01:59:24,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 01:59:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-07 01:59:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2020-11-07 01:59:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-07 01:59:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2020-11-07 01:59:24,226 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 200 [2020-11-07 01:59:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:24,227 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2020-11-07 01:59:24,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 01:59:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2020-11-07 01:59:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 01:59:24,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:24,229 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:24,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 01:59:24,229 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2018750407, now seen corresponding path program 24 times [2020-11-07 01:59:24,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:24,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084169638] [2020-11-07 01:59:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:24,288 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:24,289 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:25,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084169638] [2020-11-07 01:59:25,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:25,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-07 01:59:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325710666] [2020-11-07 01:59:25,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 01:59:25,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 01:59:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 01:59:25,486 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 52 states. [2020-11-07 01:59:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:27,697 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2020-11-07 01:59:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 01:59:27,698 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2020-11-07 01:59:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:27,700 INFO L225 Difference]: With dead ends: 249 [2020-11-07 01:59:27,700 INFO L226 Difference]: Without dead ends: 222 [2020-11-07 01:59:27,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 01:59:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-11-07 01:59:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2020-11-07 01:59:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-11-07 01:59:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-11-07 01:59:27,740 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2020-11-07 01:59:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:27,741 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-11-07 01:59:27,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 01:59:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-11-07 01:59:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-07 01:59:27,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:27,743 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:27,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 01:59:27,743 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1619636073, now seen corresponding path program 25 times [2020-11-07 01:59:27,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:27,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615853396] [2020-11-07 01:59:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:27,806 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:27,807 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:29,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:29,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615853396] [2020-11-07 01:59:29,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:29,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-11-07 01:59:29,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910764187] [2020-11-07 01:59:29,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-07 01:59:29,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-07 01:59:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 01:59:29,141 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 54 states. [2020-11-07 01:59:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:31,243 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2020-11-07 01:59:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 01:59:31,243 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 214 [2020-11-07 01:59:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:31,248 INFO L225 Difference]: With dead ends: 256 [2020-11-07 01:59:31,249 INFO L226 Difference]: Without dead ends: 229 [2020-11-07 01:59:31,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 01:59:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-07 01:59:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 224. [2020-11-07 01:59:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-11-07 01:59:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-11-07 01:59:31,279 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 214 [2020-11-07 01:59:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:31,280 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-11-07 01:59:31,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-07 01:59:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-11-07 01:59:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-11-07 01:59:31,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:31,281 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:31,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 01:59:31,282 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:31,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1324079673, now seen corresponding path program 26 times [2020-11-07 01:59:31,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:31,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824003173] [2020-11-07 01:59:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:31,349 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:31,351 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:32,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:32,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824003173] [2020-11-07 01:59:32,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:32,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-11-07 01:59:32,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38326953] [2020-11-07 01:59:32,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 01:59:32,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 01:59:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 01:59:32,718 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 56 states. [2020-11-07 01:59:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:35,248 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2020-11-07 01:59:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 01:59:35,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 221 [2020-11-07 01:59:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:35,251 INFO L225 Difference]: With dead ends: 263 [2020-11-07 01:59:35,251 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 01:59:35,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 01:59:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 01:59:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2020-11-07 01:59:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-11-07 01:59:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-11-07 01:59:35,288 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-11-07 01:59:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:35,289 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-11-07 01:59:35,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 01:59:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-11-07 01:59:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-11-07 01:59:35,290 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:35,291 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:35,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 01:59:35,291 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:35,292 INFO L82 PathProgramCache]: Analyzing trace with hash -647685481, now seen corresponding path program 27 times [2020-11-07 01:59:35,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:35,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745266552] [2020-11-07 01:59:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:35,355 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:35,356 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:36,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:36,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745266552] [2020-11-07 01:59:36,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:36,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-11-07 01:59:36,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809413897] [2020-11-07 01:59:36,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-07 01:59:36,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:36,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-07 01:59:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 01:59:36,950 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 58 states. [2020-11-07 01:59:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:39,687 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2020-11-07 01:59:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-07 01:59:39,687 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 228 [2020-11-07 01:59:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:39,690 INFO L225 Difference]: With dead ends: 270 [2020-11-07 01:59:39,690 INFO L226 Difference]: Without dead ends: 243 [2020-11-07 01:59:39,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 01:59:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-11-07 01:59:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 238. [2020-11-07 01:59:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-11-07 01:59:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2020-11-07 01:59:39,731 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 228 [2020-11-07 01:59:39,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:39,732 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2020-11-07 01:59:39,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-07 01:59:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2020-11-07 01:59:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-07 01:59:39,734 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:39,734 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:39,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 01:59:39,734 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:39,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1127343161, now seen corresponding path program 28 times [2020-11-07 01:59:39,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:39,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744930009] [2020-11-07 01:59:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:39,797 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:39,798 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:41,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:41,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744930009] [2020-11-07 01:59:41,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:41,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-11-07 01:59:41,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627158731] [2020-11-07 01:59:41,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 01:59:41,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 01:59:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 01:59:41,455 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 60 states. [2020-11-07 01:59:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:44,207 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2020-11-07 01:59:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 01:59:44,208 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 235 [2020-11-07 01:59:44,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:44,210 INFO L225 Difference]: With dead ends: 277 [2020-11-07 01:59:44,211 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 01:59:44,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 01:59:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 01:59:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2020-11-07 01:59:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-11-07 01:59:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2020-11-07 01:59:44,256 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 235 [2020-11-07 01:59:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:44,256 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2020-11-07 01:59:44,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 01:59:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2020-11-07 01:59:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-11-07 01:59:44,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:44,258 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:44,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 01:59:44,259 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1017799831, now seen corresponding path program 29 times [2020-11-07 01:59:44,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:44,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999862268] [2020-11-07 01:59:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:44,321 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:44,322 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:46,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999862268] [2020-11-07 01:59:46,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:46,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-11-07 01:59:46,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477475341] [2020-11-07 01:59:46,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-07 01:59:46,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-07 01:59:46,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 01:59:46,158 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 62 states. [2020-11-07 01:59:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:49,279 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-11-07 01:59:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 01:59:49,280 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2020-11-07 01:59:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:49,282 INFO L225 Difference]: With dead ends: 284 [2020-11-07 01:59:49,282 INFO L226 Difference]: Without dead ends: 257 [2020-11-07 01:59:49,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 01:59:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-11-07 01:59:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 252. [2020-11-07 01:59:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-07 01:59:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2020-11-07 01:59:49,326 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 242 [2020-11-07 01:59:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:49,327 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2020-11-07 01:59:49,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-07 01:59:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2020-11-07 01:59:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-11-07 01:59:49,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:49,329 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:49,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 01:59:49,329 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:49,330 INFO L82 PathProgramCache]: Analyzing trace with hash 685871559, now seen corresponding path program 30 times [2020-11-07 01:59:49,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:49,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614499025] [2020-11-07 01:59:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:49,392 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:49,393 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:51,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614499025] [2020-11-07 01:59:51,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:51,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-11-07 01:59:51,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522607152] [2020-11-07 01:59:51,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 01:59:51,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 01:59:51,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 01:59:51,322 INFO L87 Difference]: Start difference. First operand 252 states and 254 transitions. Second operand 64 states. [2020-11-07 01:59:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:54,684 INFO L93 Difference]: Finished difference Result 291 states and 295 transitions. [2020-11-07 01:59:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 01:59:54,685 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 249 [2020-11-07 01:59:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:54,687 INFO L225 Difference]: With dead ends: 291 [2020-11-07 01:59:54,687 INFO L226 Difference]: Without dead ends: 264 [2020-11-07 01:59:54,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-11-07 01:59:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-11-07 01:59:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2020-11-07 01:59:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-11-07 01:59:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2020-11-07 01:59:54,735 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 249 [2020-11-07 01:59:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:54,736 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2020-11-07 01:59:54,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 01:59:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2020-11-07 01:59:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-11-07 01:59:54,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:54,738 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:54,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 01:59:54,738 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1877356183, now seen corresponding path program 31 times [2020-11-07 01:59:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:54,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532497884] [2020-11-07 01:59:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:54,802 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:54,803 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:56,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532497884] [2020-11-07 01:59:56,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:56,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-11-07 01:59:56,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604793853] [2020-11-07 01:59:56,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-07 01:59:56,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:56,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-07 01:59:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 01:59:56,926 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 66 states. [2020-11-07 02:00:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:00,503 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2020-11-07 02:00:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-07 02:00:00,504 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 256 [2020-11-07 02:00:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:00,506 INFO L225 Difference]: With dead ends: 298 [2020-11-07 02:00:00,506 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 02:00:00,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-11-07 02:00:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 02:00:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2020-11-07 02:00:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-11-07 02:00:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2020-11-07 02:00:00,561 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 256 [2020-11-07 02:00:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:00,561 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2020-11-07 02:00:00,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-07 02:00:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2020-11-07 02:00:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-07 02:00:00,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:00,564 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:00,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 02:00:00,564 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1699838009, now seen corresponding path program 32 times [2020-11-07 02:00:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:00,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251635100] [2020-11-07 02:00:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:00,629 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:00,631 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:02,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251635100] [2020-11-07 02:00:02,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:02,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-11-07 02:00:02,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848810319] [2020-11-07 02:00:02,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 02:00:02,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 02:00:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 02:00:02,846 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 68 states. [2020-11-07 02:00:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:06,417 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2020-11-07 02:00:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-07 02:00:06,417 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 263 [2020-11-07 02:00:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:06,419 INFO L225 Difference]: With dead ends: 305 [2020-11-07 02:00:06,420 INFO L226 Difference]: Without dead ends: 278 [2020-11-07 02:00:06,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-11-07 02:00:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-11-07 02:00:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2020-11-07 02:00:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 02:00:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2020-11-07 02:00:06,475 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2020-11-07 02:00:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:06,476 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2020-11-07 02:00:06,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 02:00:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2020-11-07 02:00:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-11-07 02:00:06,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:06,478 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:06,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 02:00:06,478 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 28866711, now seen corresponding path program 33 times [2020-11-07 02:00:06,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:06,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287065013] [2020-11-07 02:00:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:06,543 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:06,544 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:08,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287065013] [2020-11-07 02:00:08,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:08,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-11-07 02:00:08,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703264062] [2020-11-07 02:00:08,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-07 02:00:08,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:08,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-07 02:00:08,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 02:00:08,900 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand 70 states. [2020-11-07 02:00:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:12,987 INFO L93 Difference]: Finished difference Result 312 states and 316 transitions. [2020-11-07 02:00:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-07 02:00:12,989 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2020-11-07 02:00:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:12,990 INFO L225 Difference]: With dead ends: 312 [2020-11-07 02:00:12,990 INFO L226 Difference]: Without dead ends: 285 [2020-11-07 02:00:12,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-11-07 02:00:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-11-07 02:00:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 280. [2020-11-07 02:00:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-11-07 02:00:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2020-11-07 02:00:13,048 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 270 [2020-11-07 02:00:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:13,049 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2020-11-07 02:00:13,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-07 02:00:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2020-11-07 02:00:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 02:00:13,051 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:13,051 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:13,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 02:00:13,051 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -812319289, now seen corresponding path program 34 times [2020-11-07 02:00:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:13,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28867756] [2020-11-07 02:00:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:13,123 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:13,124 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:15,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:15,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28867756] [2020-11-07 02:00:15,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:15,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-11-07 02:00:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409523770] [2020-11-07 02:00:15,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 02:00:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 02:00:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 02:00:15,749 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand 72 states. [2020-11-07 02:00:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:20,167 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2020-11-07 02:00:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 02:00:20,167 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 277 [2020-11-07 02:00:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:20,170 INFO L225 Difference]: With dead ends: 319 [2020-11-07 02:00:20,170 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 02:00:20,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 02:00:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 02:00:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 287. [2020-11-07 02:00:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-07 02:00:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2020-11-07 02:00:20,234 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 277 [2020-11-07 02:00:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:20,234 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2020-11-07 02:00:20,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 02:00:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2020-11-07 02:00:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-11-07 02:00:20,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:20,237 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:20,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 02:00:20,237 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:20,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1757495959, now seen corresponding path program 35 times [2020-11-07 02:00:20,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:20,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844944449] [2020-11-07 02:00:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:20,302 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:20,304 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:22,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:23,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844944449] [2020-11-07 02:00:23,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:23,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-11-07 02:00:23,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38405824] [2020-11-07 02:00:23,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-07 02:00:23,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-07 02:00:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 02:00:23,059 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand 74 states. [2020-11-07 02:00:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:27,807 INFO L93 Difference]: Finished difference Result 326 states and 330 transitions. [2020-11-07 02:00:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-11-07 02:00:27,808 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 284 [2020-11-07 02:00:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:27,810 INFO L225 Difference]: With dead ends: 326 [2020-11-07 02:00:27,811 INFO L226 Difference]: Without dead ends: 299 [2020-11-07 02:00:27,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-11-07 02:00:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-11-07 02:00:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 294. [2020-11-07 02:00:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-11-07 02:00:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-11-07 02:00:27,856 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-11-07 02:00:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:27,856 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-11-07 02:00:27,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-07 02:00:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-11-07 02:00:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-11-07 02:00:27,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:27,858 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:27,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 02:00:27,858 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1661668409, now seen corresponding path program 36 times [2020-11-07 02:00:27,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:27,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538796486] [2020-11-07 02:00:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:27,923 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:27,924 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:30,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:30,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538796486] [2020-11-07 02:00:30,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:30,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-11-07 02:00:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245255054] [2020-11-07 02:00:30,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 02:00:30,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 02:00:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 02:00:30,861 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 76 states. [2020-11-07 02:00:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:35,718 INFO L93 Difference]: Finished difference Result 333 states and 337 transitions. [2020-11-07 02:00:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-11-07 02:00:35,719 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 291 [2020-11-07 02:00:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:35,721 INFO L225 Difference]: With dead ends: 333 [2020-11-07 02:00:35,721 INFO L226 Difference]: Without dead ends: 306 [2020-11-07 02:00:35,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-11-07 02:00:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-07 02:00:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2020-11-07 02:00:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-11-07 02:00:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2020-11-07 02:00:35,790 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 291 [2020-11-07 02:00:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:35,791 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2020-11-07 02:00:35,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 02:00:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2020-11-07 02:00:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-11-07 02:00:35,793 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:35,793 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:35,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 02:00:35,793 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash 60853399, now seen corresponding path program 37 times [2020-11-07 02:00:35,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:35,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603370850] [2020-11-07 02:00:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:35,866 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:35,867 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:39,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:39,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603370850] [2020-11-07 02:00:39,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:39,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-11-07 02:00:39,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536984153] [2020-11-07 02:00:39,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-07 02:00:39,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-07 02:00:39,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 02:00:39,119 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand 78 states. [2020-11-07 02:00:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:44,160 INFO L93 Difference]: Finished difference Result 340 states and 344 transitions. [2020-11-07 02:00:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-11-07 02:00:44,161 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 298 [2020-11-07 02:00:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:44,164 INFO L225 Difference]: With dead ends: 340 [2020-11-07 02:00:44,165 INFO L226 Difference]: Without dead ends: 313 [2020-11-07 02:00:44,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-11-07 02:00:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-11-07 02:00:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2020-11-07 02:00:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-11-07 02:00:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2020-11-07 02:00:44,241 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 298 [2020-11-07 02:00:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:44,242 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2020-11-07 02:00:44,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-07 02:00:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2020-11-07 02:00:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 02:00:44,243 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:44,243 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:44,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 02:00:44,244 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash -265393721, now seen corresponding path program 38 times [2020-11-07 02:00:44,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:44,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285021206] [2020-11-07 02:00:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:44,313 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:44,314 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:47,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:47,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285021206] [2020-11-07 02:00:47,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:47,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-11-07 02:00:47,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436157364] [2020-11-07 02:00:47,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 02:00:47,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:47,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 02:00:47,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 02:00:47,737 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand 80 states. [2020-11-07 02:00:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:53,098 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2020-11-07 02:00:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-11-07 02:00:53,098 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 305 [2020-11-07 02:00:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:53,101 INFO L225 Difference]: With dead ends: 347 [2020-11-07 02:00:53,101 INFO L226 Difference]: Without dead ends: 320 [2020-11-07 02:00:53,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-11-07 02:00:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-11-07 02:00:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 315. [2020-11-07 02:00:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-11-07 02:00:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2020-11-07 02:00:53,162 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 305 [2020-11-07 02:00:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:53,162 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2020-11-07 02:00:53,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 02:00:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2020-11-07 02:00:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-11-07 02:00:53,164 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:53,165 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:53,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 02:00:53,165 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash 418797207, now seen corresponding path program 39 times [2020-11-07 02:00:53,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:53,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735009702] [2020-11-07 02:00:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:53,260 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:53,261 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:56,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:56,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735009702] [2020-11-07 02:00:56,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:56,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-11-07 02:00:56,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044670618] [2020-11-07 02:00:56,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-07 02:00:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-07 02:00:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 02:00:56,907 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 82 states. [2020-11-07 02:01:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:03,185 INFO L93 Difference]: Finished difference Result 354 states and 358 transitions. [2020-11-07 02:01:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 02:01:03,186 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 312 [2020-11-07 02:01:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:03,189 INFO L225 Difference]: With dead ends: 354 [2020-11-07 02:01:03,190 INFO L226 Difference]: Without dead ends: 327 [2020-11-07 02:01:03,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 02:01:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-11-07 02:01:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 322. [2020-11-07 02:01:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-11-07 02:01:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2020-11-07 02:01:03,249 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 312 [2020-11-07 02:01:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:03,249 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2020-11-07 02:01:03,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-07 02:01:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2020-11-07 02:01:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-07 02:01:03,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:03,252 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:03,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 02:01:03,252 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash -828284985, now seen corresponding path program 40 times [2020-11-07 02:01:03,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:03,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729156105] [2020-11-07 02:01:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:03,330 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:03,332 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:07,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:07,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729156105] [2020-11-07 02:01:07,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:07,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-11-07 02:01:07,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126687490] [2020-11-07 02:01:07,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 02:01:07,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:07,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 02:01:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 02:01:07,380 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand 84 states. [2020-11-07 02:01:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:14,266 INFO L93 Difference]: Finished difference Result 361 states and 365 transitions. [2020-11-07 02:01:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 02:01:14,266 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 319 [2020-11-07 02:01:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:14,268 INFO L225 Difference]: With dead ends: 361 [2020-11-07 02:01:14,269 INFO L226 Difference]: Without dead ends: 334 [2020-11-07 02:01:14,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-11-07 02:01:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-07 02:01:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 329. [2020-11-07 02:01:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-11-07 02:01:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 331 transitions. [2020-11-07 02:01:14,359 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 331 transitions. Word has length 319 [2020-11-07 02:01:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:14,360 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 331 transitions. [2020-11-07 02:01:14,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 02:01:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 331 transitions. [2020-11-07 02:01:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-11-07 02:01:14,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:14,363 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:14,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 02:01:14,363 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash -681402217, now seen corresponding path program 41 times [2020-11-07 02:01:14,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:14,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078426736] [2020-11-07 02:01:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:14,443 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:14,445 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:18,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:18,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078426736] [2020-11-07 02:01:18,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:18,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-11-07 02:01:18,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568168673] [2020-11-07 02:01:18,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-07 02:01:18,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-07 02:01:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 02:01:18,886 INFO L87 Difference]: Start difference. First operand 329 states and 331 transitions. Second operand 86 states. [2020-11-07 02:01:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:26,327 INFO L93 Difference]: Finished difference Result 368 states and 372 transitions. [2020-11-07 02:01:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-11-07 02:01:26,328 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 326 [2020-11-07 02:01:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:26,331 INFO L225 Difference]: With dead ends: 368 [2020-11-07 02:01:26,331 INFO L226 Difference]: Without dead ends: 341 [2020-11-07 02:01:26,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-11-07 02:01:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-07 02:01:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 336. [2020-11-07 02:01:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 02:01:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2020-11-07 02:01:26,416 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 326 [2020-11-07 02:01:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:26,416 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2020-11-07 02:01:26,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-07 02:01:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2020-11-07 02:01:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-07 02:01:26,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:26,418 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:26,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 02:01:26,419 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1437455815, now seen corresponding path program 42 times [2020-11-07 02:01:26,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:26,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067467823] [2020-11-07 02:01:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:26,505 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:26,507 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:31,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:31,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067467823] [2020-11-07 02:01:31,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:31,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-11-07 02:01:31,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985085698] [2020-11-07 02:01:31,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 02:01:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 02:01:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 02:01:31,411 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand 88 states. [2020-11-07 02:01:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:39,550 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2020-11-07 02:01:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-11-07 02:01:39,551 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 333 [2020-11-07 02:01:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:39,554 INFO L225 Difference]: With dead ends: 375 [2020-11-07 02:01:39,554 INFO L226 Difference]: Without dead ends: 348 [2020-11-07 02:01:39,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-11-07 02:01:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-11-07 02:01:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 343. [2020-11-07 02:01:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 02:01:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2020-11-07 02:01:39,655 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 333 [2020-11-07 02:01:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:39,655 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2020-11-07 02:01:39,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-07 02:01:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2020-11-07 02:01:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-11-07 02:01:39,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:39,659 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:39,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 02:01:39,659 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1434806935, now seen corresponding path program 43 times [2020-11-07 02:01:39,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:39,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295300562] [2020-11-07 02:01:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:39,736 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:39,737 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:44,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:45,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295300562] [2020-11-07 02:01:45,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:45,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-11-07 02:01:45,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701318835] [2020-11-07 02:01:45,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-11-07 02:01:45,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:45,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-11-07 02:01:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 02:01:45,032 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand 90 states. [2020-11-07 02:01:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:53,877 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2020-11-07 02:01:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-11-07 02:01:53,878 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 340 [2020-11-07 02:01:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:53,881 INFO L225 Difference]: With dead ends: 382 [2020-11-07 02:01:53,881 INFO L226 Difference]: Without dead ends: 355 [2020-11-07 02:01:53,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-11-07 02:01:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-11-07 02:01:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 350. [2020-11-07 02:01:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-11-07 02:01:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 352 transitions. [2020-11-07 02:01:53,954 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 352 transitions. Word has length 340 [2020-11-07 02:01:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:53,955 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 352 transitions. [2020-11-07 02:01:53,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-11-07 02:01:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 352 transitions. [2020-11-07 02:01:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-11-07 02:01:53,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:53,957 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:53,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 02:01:53,957 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1162622009, now seen corresponding path program 44 times [2020-11-07 02:01:53,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:53,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482427800] [2020-11-07 02:01:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:54,035 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:54,037 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:59,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:00,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482427800] [2020-11-07 02:02:00,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:00,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-11-07 02:02:00,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687692304] [2020-11-07 02:02:00,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-07 02:02:00,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-07 02:02:00,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 02:02:00,014 INFO L87 Difference]: Start difference. First operand 350 states and 352 transitions. Second operand 92 states. [2020-11-07 02:02:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:09,657 INFO L93 Difference]: Finished difference Result 389 states and 393 transitions. [2020-11-07 02:02:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-11-07 02:02:09,658 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 347 [2020-11-07 02:02:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:09,660 INFO L225 Difference]: With dead ends: 389 [2020-11-07 02:02:09,661 INFO L226 Difference]: Without dead ends: 362 [2020-11-07 02:02:09,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-11-07 02:02:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-11-07 02:02:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2020-11-07 02:02:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-11-07 02:02:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-11-07 02:02:09,806 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-11-07 02:02:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:09,807 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-11-07 02:02:09,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-07 02:02:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-11-07 02:02:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-11-07 02:02:09,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:09,810 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:02:09,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 02:02:09,810 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:09,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1845578601, now seen corresponding path program 45 times [2020-11-07 02:02:09,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:09,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137027536] [2020-11-07 02:02:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:09,899 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:09,901 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:16,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:16,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137027536] [2020-11-07 02:02:16,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:16,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-11-07 02:02:16,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449519942] [2020-11-07 02:02:16,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-07 02:02:16,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:16,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-07 02:02:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-11-07 02:02:16,325 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 94 states. [2020-11-07 02:02:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:26,557 INFO L93 Difference]: Finished difference Result 396 states and 400 transitions. [2020-11-07 02:02:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-11-07 02:02:26,558 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 354 [2020-11-07 02:02:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:26,560 INFO L225 Difference]: With dead ends: 396 [2020-11-07 02:02:26,561 INFO L226 Difference]: Without dead ends: 369 [2020-11-07 02:02:26,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-11-07 02:02:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-11-07 02:02:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2020-11-07 02:02:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-11-07 02:02:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 366 transitions. [2020-11-07 02:02:26,648 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 366 transitions. Word has length 354 [2020-11-07 02:02:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:26,648 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 366 transitions. [2020-11-07 02:02:26,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-07 02:02:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 366 transitions. [2020-11-07 02:02:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-11-07 02:02:26,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:26,651 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:02:26,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 02:02:26,651 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1259553223, now seen corresponding path program 46 times [2020-11-07 02:02:26,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:26,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953003833] [2020-11-07 02:02:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:26,758 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:26,760 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:33,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953003833] [2020-11-07 02:02:34,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:34,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-11-07 02:02:34,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418892898] [2020-11-07 02:02:34,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-07 02:02:34,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-07 02:02:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 02:02:34,064 INFO L87 Difference]: Start difference. First operand 364 states and 366 transitions. Second operand 96 states. [2020-11-07 02:02:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:45,978 INFO L93 Difference]: Finished difference Result 403 states and 407 transitions. [2020-11-07 02:02:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-11-07 02:02:45,979 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 361 [2020-11-07 02:02:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:45,982 INFO L225 Difference]: With dead ends: 403 [2020-11-07 02:02:45,982 INFO L226 Difference]: Without dead ends: 376 [2020-11-07 02:02:45,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-11-07 02:02:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-11-07 02:02:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 371. [2020-11-07 02:02:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-11-07 02:02:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2020-11-07 02:02:46,083 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 361 [2020-11-07 02:02:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:46,084 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2020-11-07 02:02:46,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-07 02:02:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2020-11-07 02:02:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-11-07 02:02:46,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:46,087 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:02:46,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 02:02:46,088 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:46,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1936621207, now seen corresponding path program 47 times [2020-11-07 02:02:46,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:46,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88405207] [2020-11-07 02:02:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:46,208 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:46,210 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:54,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88405207] [2020-11-07 02:02:54,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:54,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-11-07 02:02:54,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835691667] [2020-11-07 02:02:54,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-11-07 02:02:54,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:54,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-11-07 02:02:54,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-11-07 02:02:54,300 INFO L87 Difference]: Start difference. First operand 371 states and 373 transitions. Second operand 98 states. [2020-11-07 02:03:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:07,570 INFO L93 Difference]: Finished difference Result 410 states and 414 transitions. [2020-11-07 02:03:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-11-07 02:03:07,572 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 368 [2020-11-07 02:03:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:07,575 INFO L225 Difference]: With dead ends: 410 [2020-11-07 02:03:07,575 INFO L226 Difference]: Without dead ends: 383 [2020-11-07 02:03:07,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-11-07 02:03:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-11-07 02:03:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 378. [2020-11-07 02:03:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-11-07 02:03:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 380 transitions. [2020-11-07 02:03:07,705 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 380 transitions. Word has length 368 [2020-11-07 02:03:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:07,706 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 380 transitions. [2020-11-07 02:03:07,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-11-07 02:03:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 380 transitions. [2020-11-07 02:03:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-11-07 02:03:07,709 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:07,709 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:03:07,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 02:03:07,709 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:07,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1814837191, now seen corresponding path program 48 times [2020-11-07 02:03:07,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:07,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745381460] [2020-11-07 02:03:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:07,817 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:07,819 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:03:17,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745381460] [2020-11-07 02:03:17,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:17,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-11-07 02:03:17,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974197300] [2020-11-07 02:03:17,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-07 02:03:17,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-07 02:03:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 02:03:17,066 INFO L87 Difference]: Start difference. First operand 378 states and 380 transitions. Second operand 100 states. [2020-11-07 02:03:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:31,401 INFO L93 Difference]: Finished difference Result 417 states and 421 transitions. [2020-11-07 02:03:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-11-07 02:03:31,403 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 375 [2020-11-07 02:03:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:31,406 INFO L225 Difference]: With dead ends: 417 [2020-11-07 02:03:31,406 INFO L226 Difference]: Without dead ends: 390 [2020-11-07 02:03:31,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-11-07 02:03:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-11-07 02:03:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 385. [2020-11-07 02:03:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-11-07 02:03:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 387 transitions. [2020-11-07 02:03:31,509 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 387 transitions. Word has length 375 [2020-11-07 02:03:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:31,509 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 387 transitions. [2020-11-07 02:03:31,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-07 02:03:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 387 transitions. [2020-11-07 02:03:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-11-07 02:03:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:31,512 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:03:31,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 02:03:31,512 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash -931870569, now seen corresponding path program 49 times [2020-11-07 02:03:31,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:31,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349449365] [2020-11-07 02:03:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:31,652 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:31,654 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:41,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:03:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349449365] [2020-11-07 02:03:41,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:41,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-11-07 02:03:41,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415064629] [2020-11-07 02:03:41,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-07 02:03:41,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:41,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-07 02:03:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-11-07 02:03:41,739 INFO L87 Difference]: Start difference. First operand 385 states and 387 transitions. Second operand 102 states. [2020-11-07 02:03:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:58,531 INFO L93 Difference]: Finished difference Result 424 states and 428 transitions. [2020-11-07 02:03:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-11-07 02:03:58,533 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 382 [2020-11-07 02:03:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:58,536 INFO L225 Difference]: With dead ends: 424 [2020-11-07 02:03:58,536 INFO L226 Difference]: Without dead ends: 397 [2020-11-07 02:03:58,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-11-07 02:03:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-11-07 02:03:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 392. [2020-11-07 02:03:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-11-07 02:03:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 394 transitions. [2020-11-07 02:03:58,643 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 394 transitions. Word has length 382 [2020-11-07 02:03:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:58,643 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 394 transitions. [2020-11-07 02:03:58,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-07 02:03:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 394 transitions. [2020-11-07 02:03:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-11-07 02:03:58,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:58,646 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:03:58,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 02:03:58,647 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:58,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1688293945, now seen corresponding path program 50 times [2020-11-07 02:03:58,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:58,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287955834] [2020-11-07 02:03:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:58,778 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:58,780 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:09,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:04:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287955834] [2020-11-07 02:04:10,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:10,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-11-07 02:04:10,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233677274] [2020-11-07 02:04:10,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-11-07 02:04:10,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:10,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-11-07 02:04:10,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 02:04:10,118 INFO L87 Difference]: Start difference. First operand 392 states and 394 transitions. Second operand 104 states. [2020-11-07 02:04:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:27,714 INFO L93 Difference]: Finished difference Result 431 states and 435 transitions. [2020-11-07 02:04:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-11-07 02:04:27,717 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 389 [2020-11-07 02:04:27,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:27,720 INFO L225 Difference]: With dead ends: 431 [2020-11-07 02:04:27,720 INFO L226 Difference]: Without dead ends: 404 [2020-11-07 02:04:27,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-11-07 02:04:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-11-07 02:04:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2020-11-07 02:04:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-11-07 02:04:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 401 transitions. [2020-11-07 02:04:27,835 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 401 transitions. Word has length 389 [2020-11-07 02:04:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:27,835 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 401 transitions. [2020-11-07 02:04:27,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-11-07 02:04:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 401 transitions. [2020-11-07 02:04:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-11-07 02:04:27,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:27,839 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:04:27,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 02:04:27,839 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1202819735, now seen corresponding path program 51 times [2020-11-07 02:04:27,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:27,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504031673] [2020-11-07 02:04:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:27,960 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:27,962 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:39,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:04:40,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504031673] [2020-11-07 02:04:40,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:40,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-11-07 02:04:40,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509574124] [2020-11-07 02:04:40,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-11-07 02:04:40,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:40,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-11-07 02:04:40,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-11-07 02:04:40,054 INFO L87 Difference]: Start difference. First operand 399 states and 401 transitions. Second operand 106 states. [2020-11-07 02:05:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:01,139 INFO L93 Difference]: Finished difference Result 438 states and 442 transitions. [2020-11-07 02:05:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-11-07 02:05:01,142 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 396 [2020-11-07 02:05:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:01,145 INFO L225 Difference]: With dead ends: 438 [2020-11-07 02:05:01,145 INFO L226 Difference]: Without dead ends: 411 [2020-11-07 02:05:01,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-11-07 02:05:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-11-07 02:05:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 406. [2020-11-07 02:05:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-11-07 02:05:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 408 transitions. [2020-11-07 02:05:01,245 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 408 transitions. Word has length 396 [2020-11-07 02:05:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:01,245 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 408 transitions. [2020-11-07 02:05:01,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-11-07 02:05:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 408 transitions. [2020-11-07 02:05:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-11-07 02:05:01,247 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:01,247 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:01,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 02:05:01,247 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1846191047, now seen corresponding path program 52 times [2020-11-07 02:05:01,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:01,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311669022] [2020-11-07 02:05:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:01,463 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:01,465 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:14,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311669022] [2020-11-07 02:05:15,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:15,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-11-07 02:05:15,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365664167] [2020-11-07 02:05:15,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-11-07 02:05:15,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-11-07 02:05:15,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 02:05:15,085 INFO L87 Difference]: Start difference. First operand 406 states and 408 transitions. Second operand 108 states. [2020-11-07 02:05:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:37,911 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2020-11-07 02:05:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-11-07 02:05:37,915 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 403 [2020-11-07 02:05:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:37,918 INFO L225 Difference]: With dead ends: 445 [2020-11-07 02:05:37,918 INFO L226 Difference]: Without dead ends: 418 [2020-11-07 02:05:37,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-11-07 02:05:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-11-07 02:05:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 413. [2020-11-07 02:05:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-11-07 02:05:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 415 transitions. [2020-11-07 02:05:38,101 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 415 transitions. Word has length 403 [2020-11-07 02:05:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:38,101 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 415 transitions. [2020-11-07 02:05:38,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-11-07 02:05:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 415 transitions. [2020-11-07 02:05:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-11-07 02:05:38,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:38,103 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:38,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 02:05:38,103 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1882923881, now seen corresponding path program 53 times [2020-11-07 02:05:38,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:38,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151674930] [2020-11-07 02:05:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:38,252 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:38,254 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:53,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:53,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151674930] [2020-11-07 02:05:53,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:53,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-11-07 02:05:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574752272] [2020-11-07 02:05:53,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-11-07 02:05:53,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-11-07 02:05:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-11-07 02:05:53,447 INFO L87 Difference]: Start difference. First operand 413 states and 415 transitions. Second operand 110 states. [2020-11-07 02:06:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:19,337 INFO L93 Difference]: Finished difference Result 452 states and 456 transitions. [2020-11-07 02:06:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-11-07 02:06:19,341 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 410 [2020-11-07 02:06:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:19,344 INFO L225 Difference]: With dead ends: 452 [2020-11-07 02:06:19,344 INFO L226 Difference]: Without dead ends: 425 [2020-11-07 02:06:19,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-11-07 02:06:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-11-07 02:06:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2020-11-07 02:06:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-11-07 02:06:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-11-07 02:06:19,474 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-11-07 02:06:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:19,475 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-11-07 02:06:19,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-11-07 02:06:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-11-07 02:06:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-11-07 02:06:19,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:19,477 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:19,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 02:06:19,477 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1852827193, now seen corresponding path program 54 times [2020-11-07 02:06:19,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:19,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988924941] [2020-11-07 02:06:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:19,676 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:19,678 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:36,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:36,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988924941] [2020-11-07 02:06:36,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:36,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-11-07 02:06:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209799850] [2020-11-07 02:06:36,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-11-07 02:06:36,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:36,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-11-07 02:06:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 02:06:36,363 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 112 states. [2020-11-07 02:07:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:04,313 INFO L93 Difference]: Finished difference Result 459 states and 463 transitions. [2020-11-07 02:07:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-11-07 02:07:04,317 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 417 [2020-11-07 02:07:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:04,320 INFO L225 Difference]: With dead ends: 459 [2020-11-07 02:07:04,321 INFO L226 Difference]: Without dead ends: 432 [2020-11-07 02:07:04,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-11-07 02:07:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-11-07 02:07:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 427. [2020-11-07 02:07:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-11-07 02:07:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 429 transitions. [2020-11-07 02:07:04,436 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 429 transitions. Word has length 417 [2020-11-07 02:07:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:04,436 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 429 transitions. [2020-11-07 02:07:04,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-11-07 02:07:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 429 transitions. [2020-11-07 02:07:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-11-07 02:07:04,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:04,439 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:04,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 02:07:04,439 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:04,440 INFO L82 PathProgramCache]: Analyzing trace with hash 659465879, now seen corresponding path program 55 times [2020-11-07 02:07:04,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:04,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319157867] [2020-11-07 02:07:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:04,628 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:04,629 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:23,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:23,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319157867] [2020-11-07 02:07:23,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:23,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-11-07 02:07:23,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168781588] [2020-11-07 02:07:23,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-11-07 02:07:23,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-11-07 02:07:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-11-07 02:07:23,903 INFO L87 Difference]: Start difference. First operand 427 states and 429 transitions. Second operand 114 states. [2020-11-07 02:07:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:53,445 INFO L93 Difference]: Finished difference Result 466 states and 470 transitions. [2020-11-07 02:07:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-11-07 02:07:53,452 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 424 [2020-11-07 02:07:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:53,455 INFO L225 Difference]: With dead ends: 466 [2020-11-07 02:07:53,455 INFO L226 Difference]: Without dead ends: 439 [2020-11-07 02:07:53,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-11-07 02:07:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-11-07 02:07:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 434. [2020-11-07 02:07:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-11-07 02:07:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 436 transitions. [2020-11-07 02:07:53,577 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 436 transitions. Word has length 424 [2020-11-07 02:07:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:53,577 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 436 transitions. [2020-11-07 02:07:53,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-11-07 02:07:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 436 transitions. [2020-11-07 02:07:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-11-07 02:07:53,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:53,580 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:53,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 02:07:53,580 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -884011065, now seen corresponding path program 56 times [2020-11-07 02:07:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:53,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115503756] [2020-11-07 02:07:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:53,766 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:53,768 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:14,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:14,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115503756] [2020-11-07 02:08:14,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:14,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-11-07 02:08:14,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990689928] [2020-11-07 02:08:14,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-11-07 02:08:14,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:14,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-11-07 02:08:14,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 02:08:14,490 INFO L87 Difference]: Start difference. First operand 434 states and 436 transitions. Second operand 116 states. [2020-11-07 02:08:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:48,971 INFO L93 Difference]: Finished difference Result 473 states and 477 transitions. [2020-11-07 02:08:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-11-07 02:08:48,977 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 431 [2020-11-07 02:08:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:48,979 INFO L225 Difference]: With dead ends: 473 [2020-11-07 02:08:48,980 INFO L226 Difference]: Without dead ends: 446 [2020-11-07 02:08:48,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-11-07 02:08:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-11-07 02:08:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 441. [2020-11-07 02:08:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-11-07 02:08:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 443 transitions. [2020-11-07 02:08:49,133 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 443 transitions. Word has length 431 [2020-11-07 02:08:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:49,134 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 443 transitions. [2020-11-07 02:08:49,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-11-07 02:08:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 443 transitions. [2020-11-07 02:08:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-11-07 02:08:49,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:49,136 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:49,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 02:08:49,137 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2096033943, now seen corresponding path program 57 times [2020-11-07 02:08:49,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:49,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473601805] [2020-11-07 02:08:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:49,355 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:49,357 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:11,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:12,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473601805] [2020-11-07 02:09:12,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:12,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-11-07 02:09:12,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228007703] [2020-11-07 02:09:12,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-11-07 02:09:12,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:12,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-11-07 02:09:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-11-07 02:09:12,104 INFO L87 Difference]: Start difference. First operand 441 states and 443 transitions. Second operand 118 states. [2020-11-07 02:09:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:36,632 INFO L93 Difference]: Finished difference Result 480 states and 484 transitions. [2020-11-07 02:09:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-11-07 02:09:36,645 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 438 [2020-11-07 02:09:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:36,647 INFO L225 Difference]: With dead ends: 480 [2020-11-07 02:09:36,648 INFO L226 Difference]: Without dead ends: 453 [2020-11-07 02:09:36,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-11-07 02:09:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-11-07 02:09:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 448. [2020-11-07 02:09:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-11-07 02:09:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 450 transitions. [2020-11-07 02:09:36,820 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 450 transitions. Word has length 438 [2020-11-07 02:09:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:36,821 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 450 transitions. [2020-11-07 02:09:36,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-11-07 02:09:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 450 transitions. [2020-11-07 02:09:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-11-07 02:09:36,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:36,823 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:36,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 02:09:36,823 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash -123238969, now seen corresponding path program 58 times [2020-11-07 02:09:36,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:36,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797056453] [2020-11-07 02:09:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:36,949 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:36,951 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:54,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:54,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797056453] [2020-11-07 02:09:54,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:54,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-11-07 02:09:54,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977800097] [2020-11-07 02:09:54,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-11-07 02:09:54,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-11-07 02:09:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 02:09:54,424 INFO L87 Difference]: Start difference. First operand 448 states and 450 transitions. Second operand 120 states. [2020-11-07 02:10:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:22,245 INFO L93 Difference]: Finished difference Result 487 states and 491 transitions. [2020-11-07 02:10:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-11-07 02:10:22,249 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 445 [2020-11-07 02:10:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:22,252 INFO L225 Difference]: With dead ends: 487 [2020-11-07 02:10:22,252 INFO L226 Difference]: Without dead ends: 460 [2020-11-07 02:10:22,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-11-07 02:10:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-11-07 02:10:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 455. [2020-11-07 02:10:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-11-07 02:10:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 457 transitions. [2020-11-07 02:10:22,403 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 457 transitions. Word has length 445 [2020-11-07 02:10:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:22,403 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 457 transitions. [2020-11-07 02:10:22,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-11-07 02:10:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 457 transitions. [2020-11-07 02:10:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-11-07 02:10:22,405 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:22,406 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:22,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 02:10:22,406 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:22,406 INFO L82 PathProgramCache]: Analyzing trace with hash -414860649, now seen corresponding path program 59 times [2020-11-07 02:10:22,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:22,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314854492] [2020-11-07 02:10:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:22,563 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:22,564 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:40,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:41,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314854492] [2020-11-07 02:10:41,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:41,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-11-07 02:10:41,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901605967] [2020-11-07 02:10:41,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-11-07 02:10:41,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-11-07 02:10:41,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-11-07 02:10:41,039 INFO L87 Difference]: Start difference. First operand 455 states and 457 transitions. Second operand 122 states. [2020-11-07 02:11:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:06,484 INFO L93 Difference]: Finished difference Result 494 states and 498 transitions. [2020-11-07 02:11:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-11-07 02:11:06,486 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 452 [2020-11-07 02:11:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:06,489 INFO L225 Difference]: With dead ends: 494 [2020-11-07 02:11:06,489 INFO L226 Difference]: Without dead ends: 467 [2020-11-07 02:11:06,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-11-07 02:11:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-11-07 02:11:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 462. [2020-11-07 02:11:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-11-07 02:11:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 464 transitions. [2020-11-07 02:11:06,638 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 464 transitions. Word has length 452 [2020-11-07 02:11:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:06,638 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 464 transitions. [2020-11-07 02:11:06,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-11-07 02:11:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 464 transitions. [2020-11-07 02:11:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-11-07 02:11:06,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:06,640 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:06,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-07 02:11:06,640 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 251231175, now seen corresponding path program 60 times [2020-11-07 02:11:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:06,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565050896] [2020-11-07 02:11:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:06,769 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:06,770 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:23,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:23,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565050896] [2020-11-07 02:11:23,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:23,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2020-11-07 02:11:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125569630] [2020-11-07 02:11:23,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-11-07 02:11:23,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-11-07 02:11:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-11-07 02:11:23,645 INFO L87 Difference]: Start difference. First operand 462 states and 464 transitions. Second operand 124 states.